HP Color LaserJet Enterprise CP4020 Service Manual

HP Color LaserJet Enterprise CP4020 Manual

Get HP Color LaserJet Enterprise CP4020 PDF manuals and user guides View all HP Color LaserJet Enterprise CP4020 manuals
Add to My Manuals
Save this manual to your list of manuals

HP Color LaserJet Enterprise CP4020 manual content summary:

  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 1
    COLOR LASERJET ENTERPRISE CP4020/CP4520 SERIES PRINTER Service Manual CP4025n CP4025dn CP4525n CP4525dn CP4525xh
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 2
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 3
    HP Color LaserJet Enterprise CP4020CP4520 Series Printers Service Manual
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 4
    HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP . PANTONE® is Pantone, Inc's checkstandard trademark for color. UNIX® is a registered trademark of The Open
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 5
    this guide TIP: Tips provide helpful hints or shortcuts. NOTE: Notes provide important information to explain a concept or to complete a task. CAUTION: Cautions indicate procedures that you should follow to avoid losing data or damaging the product. WARNING! Warnings alert you to specific procedures
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 6
    iv Conventions used in this guide ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 7
    Table of contents 1 Theory of operation Basic operation ...2 Sequence of operation ...3 Engine-control system ...4 DC controller ...5 Solenoids ...5 Clutches ...6 Switches ...6 Sensors ...7 Motors ...8 Fans ...9 High-voltage power supply 10 Low-voltage power supply 12 Overcurrent/overvoltage
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 8
    unit ...48 Loop control ...49 Pressure-roller pressurization control 50 Duplexing unit (HP Color LaserJet CP4525dn, HP Color LaserJet CP4025dn, and HP Color LaserJet CP4525xh only 52 Duplexing reverse and feed control 52 Duplex print operation 53 Jam detection ...55 Optional paper feeder ...57
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 9
    Before performing service ...70 After performing service ...70 Post-service test ...71 Print-quality test ...71 Parts removal order ...72 Customer self repair (CSR) components 74 Print cartridges ...74 Toner-collection unit ...76 Formatter PCA ...
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 10
    Cassette feed guide ...118 Secondary transfer assembly 119 Reinstall the secondary transfer assembly 120 ...145 Remove the delivery assembly 145 Reinstall the delivery assembly 149 Duplex-drive assembly ...151 Remove the duplex-drive assembly 151 Power-supply fan ...152 Remove the power-supply
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 11
    Lifter-drive assembly ...173 Remove the lifter-drive assembly 173 Lifter base assembly ...175 Remove the lifter base assembly 175 Reinstall the lifter base assembly 176 Tray-pickup drive assembly 178 Remove the tray-pickup drive assembly 178 Tray-pickup assembly ...180 Remove the tray-pickup
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 12
    Remove the controller PCA (optional paper feeder 232 3 Solve problems Solve problems checklist ...234 Menu map ...236 Troubleshooting process ...237 Determine the problem source 237 Pre-troubleshooting checklist 237 Troubleshooting flowchart 239 Power subsystem ...240 Power-on checks 240 Power
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 13
    components 284 General timing chart 294 Circuit diagrams 294 HP Easy Printer Care ...298 Open the HP Easy Printer Care software 299 HP Easy Printer Care software sections 299 Internal print-quality test pages 302 Print-quality-troubleshooting pages 302 Diagnostics page 305 Cleaning page 306
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 14
    Diagnostics menu 342 Service menu 344 Interpret duplex area (HP Color LaserJet CP4525dn, HP Color LaserJet CP4025dn, and HP Color LaserJet CP4525xh only 397 Jams in Tray 1, Tray 2 and internal paper path 399 Jams in Tray 3, 4, and 5 400 Change jam recovery ...402 Solve paper-handling problems
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 15
    wrinkled 406 Product will not duplex or duplexes incorrectly 406 Use manual print modes ...408 Solve image-quality problems ...410 Image defects table ... Cables and interfaces ...427 Customer self repair (CSR) parts 428 Service maintenance kits 428 Unique components ...429 Screws ...430 How to
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 16
    495 HP Color LaserJet Fuser Kit Limited Warranty Statement 496 End User License Agreement ...497 Customer self-repair warranty service 499 Customer support ...500 Appendix B Product specifications Physical specifications ...502 Performance specifications ...502 Electrical specifications ...502
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 17
    Return and recycling instructions 508 United States and Puerto Rico 508 Multiple returns (more than one cartridge 508 Single returns 508 Shipping 508 Non-U.S. returns 508 Paper ...508 Material restrictions ...509 Disposal of waste equipment by users in private households in the European Union
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 18
    xvi ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 19
    1-17 Electrical components for the paper feeder 59 Table 1-18 Pickup feed components (1 x 500-sheet paper feeder 60 Table 3-1 Pre-troubleshooting checklist ...237 Table 3-2 Troubleshooting flowchart ...239 Table 3-3 Manual sensor diagnostic tests ...246 Table 3-4 Default state of bits ...246 Table
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 20
    MP modes under the OPTIMIZE submenu 409 Table 4-1 Maintenance kits ...428 Table 4-2 110V and 220V unique components 429 Table 4-3 Simplex and duplex unique components 429 Table 4-4 Common fasteners ...430 Table 4-5 External covers, panels, and doors 433 Table 4-6 Right door assembly ...435 Table
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 21
    Table B-3 Table B-4 Table B-5 Table B-6 Product dimensions, with all doors and trays fully opened 502 Power requirements ...503 Power consumption (average, in watts)1246 503 HP Color LaserJet Enterprise CP4020-CP4520 Series13 503 Media registration and image placement accuracy 504 ENWW xix
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 22
    xx ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 23
    List of figures Figure 1-1 Relationship between the main product systems 2 Figure 1-2 Engine-control system ...4 Figure 1-3 DC controller block diagram ...5 Figure 1-4 High-voltage power supply circuits 10 Figure 1-5 Low-voltage power-supply circuit ...12 Figure 1-6 Fuser components ...14 Figure
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 24
    and delivery unit ...49 Figure 1-41 Loop-control mechanism ...50 Figure 1-42 Pressure-roller pressurization control 51 Figure 1-43 Duplexing unit ...52 Figure 1-44 Duplex reverse and feed control 53 Figure 1-45 Jam detection sensors ...55 Figure 1-46 1 x 500 optional paper feeder ...57 Figure
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 25
    Remove the right-door assembly (7 of 9 116 Remove the right-door assembly (8 of 9 116 Remove the right-door assembly (9 of 9 117 Remove the cassette feed guide (1 of 2 118 Remove the cassette feed (2 of 2 118 ENWW xxiii
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 26
    Figure 2-71 Remove the secondary transfer assembly (1 of 3 119 Figure 2-72 Remove the secondary transfer assembly (2 of 3 119 Figure 2-73 Remove the secondary transfer assembly (3 of 3 120 Figure 2-74 Reinstall the secondary transfer assembly 120 Figure 2-75 Remove the separation pad (1 of 6
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 27
    (1 of 4 149 Reinstall the delivery assembly (2 of 4 149 Reinstall the delivery assembly (3 of 4 150 Reinstall the delivery assembly (4 of 4 150 Remove the duplex-drive assembly 151 Remove the power-supply fan 152 Remove the ICB (1 of 2) ...153 Remove the ICB (2 of 2) ...154 Remove the DC
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 28
    Figure 2-159 Figure 2-160 Figure 2-161 Figure 2-162 Figure 2-163 Figure 2-164 Figure 2-165 Figure 2-166 Figure 2-167 Figure 2-168 Figure 2-169 Figure 2-170 Figure 2-171 Figure 2-172 Figure 2-173 Figure 2-174 Figure 2-175 Figure 2-176 Figure 2-177 Figure 2-178 Figure 2-179 Figure 2-180 Figure 2-181
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 29
    Figure 2-203 Reinstall the main-drive assembly (2 of 7 207 Figure 2-204 Reinstall the main-drive assembly (3 of 7 208 Figure 2-205 Reinstall the main-drive assembly (4 of 7 209 Figure 2-206 Reinstall the main-drive assembly (5 of 7 209 Figure 2-207 Reinstall the main-drive assembly (6 of 7 210
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 30
    2 249 Figure 3-8 Test the fuser delivery sensor (2 of 2 249 Figure 3-9 Test the duplex re-pickup sensor 250 Figure 3-10 Test the output-bin-full sensor ...251 Figure 3-11 circuit diagram (3 X 500-sheet 297 Figure 3-48 Print-quality troubleshooting procedure 302 Figure 3-49 Yellow print-quality
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 31
    Figure 3-50 Yellow comparison page ...303 Figure 3-51 Black print-quality troubleshooting page 304 Figure 3-52 Configuration page ...307 Figure 3-53 HP embedded Jetdirect page ...309 Figure 3-54 Embedded protocol page ...310 Figure 3-55 Repetitive defects ruler ...312 Figure 3-56 Sample event log
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 32
    xxx ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 33
    1 Theory of operation ● Basic operation ● Engine-control system ● Laser/scanner system ● Image-formation system ● Pickup, feed, and delivery system ● Jam detection ● Optional paper feeder ENWW 1
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 34
    Basic operation The product routes all high-level processes through the formatter, which stores font information, processes the print image, and communicates with the host computer. The basic product operation comprises the following systems: ● The engine-control system, which includes the power
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 35
    Sequence of operation The DC controller PCA controls the operating sequence, as described in the following table. Table 1-1 Sequence of operation Period Duration Description Waiting Standby Initial rotation Printing Last rotation From the time the power is turned on, the ● door is closed, or
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 36
    Engine-control system The engine-control system receives commands from the formatter and interacts with the other main systems to coordinate all product functions. The engine-control system consists of the following components: ● DC controller ● Low-voltage power supply ● High-voltage power supply
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 37
    Component abbreviation SL1 SL2 SL3 SL4 Component name Primary transfer roller disengagement solenoid Duplex reverse solenoid (HP Color LaserJet CP4525dn, HP Color LaserJet CP4025dn, and HP Color LaserJet CP4525xh only) Multipurpose-tray pickup solenoid Cassette pickup solenoid ENWW Engine-control
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 38
    Clutches Component abbreviation CL1 Component name Duplex re-pickup clutch (HP Color LaserJet CP4525dn, HP Color LaserJet CP4025dn, and HP Color LaserJet CP4525xh only) Switches Table 1-3 Switches Component abbreviation SW1 SW2 SW3 SW4 SW5 SW6 Component name 5V interlock switch 24V interlock
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 39
    ITB sensor Developer alienation sensor Loop sensor 1 Loop sensor 2 TOP (top of page) sensor Duplex re-pickup sensor (HP Color LaserJet CP4525dn, HP Color LaserJet CP4025dn, and HP Color LaserJet CP4525xh only) Tray 2 paper surface 1 sensor Tray 2 paper surface 2 sensor Tray 2 paper present sensor
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 40
    disengagement Drives the developing unit No motor disengagement M11 Duplex reverse motor (HP Drives the duplex reverse No Color LaserJet CP4525dn, roller and duplex feed roller HP Color LaserJet CP4025dn , and HP Color LaserJet CP4525xh only) M12 Residual toner-feed motor Drives the
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 41
    The DC controller determines if a motor has failed and notifies the formatter when it encounters the following conditions: ● Startup failure: the motor does not reach a specified speed within a specified time from when the motor starts. ● Rotational failure: the rotational speed of the motor is not
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 42
    photosensitive drum to prepare for image formation. The primary-charging-bias circuit in the high-voltage power supply generates the biases for each color. The developing bias adheres toner to an electrostatic latent image formed on the photosensitive drum. The developing-bias circuit in the high
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 43
    toner from each photosensitive drum onto the ITB. The primary transfer bias circuit in the high-voltage power supply generates the biases for each color. The secondary transfer bias transfers the toner image from the ITB onto the paper. The secondary transfer bias circuit in the high-voltage power
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 44
    Low-voltage power supply The low-voltage power-supply circuit converts the AC power from the wall receptacle into the DC voltage that the product components use. The product has two low-voltage power-supplies for 110 Volt or 220 Volt input. Figure 1-5 Low-voltage power-supply circuit AC input DC
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 45
    Table 1-8 Converted DC voltages (continued) Main DC voltage Sub-voltage +24 VB +5 V +5 VB +5 VC +3.3 V 3.3 V 3.3 VS Behavior Interrupted when the front door or right door open Constantly supplied Interrupted when the front door or right door open Constantly supplied Stopped during Sleep (
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 46
    Fuser control The fuser heater-control circuit and the fuser heater safety circuit control the fuser temperature according to commands from the DC controller. Figure 1-6 Fuser components TH3 Pressure roller TP1 TH1 H1 TH2 Low-voltage power supply unit DC controller FUSER HEATER CONTROL
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 47
    Fuser temperature control The fuser temperature control maintains the target surface temperature of the fuser sleeve. Figure 1-7 Fuser temperature-control circuit Fuser Fuser sleeve unit TH1 TH2 TP1 TH3 H1 Pressure roller H1: Fuser heater TP1:Thermoswitch TH1: Main thermistor TH2: Sub thermistor 1
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 48
    ◦ Current detection circuit ◦ Thermoswitch ● DC controller: The DC controller monitors the detected temperature of the main thermistor and sub thermistors. The DC controller deactivates the FIXING HEATER CONTROL signal and releases the relay to interrupt power supply to the fuser heater under the
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 49
    installed. The fuser from a different product (for example, the HP Color LaserJet CP 3525 Series printer) can be installed in this product, but it will not If a new fuser is installed for troubleshooting purposes, be sure to remove it before printing 100 pages. ENWW Engine-control system
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 50
    Laser/scanner system The laser/scanner system forms the latent electrostatic image on the photosensitive drums according to the VIDEO signals sent from the formatter. The product has two laser/scanners: one for yellow and magenta and the other for cyan and black. The main components of the laser/
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 51
    Laser/scanner failure The DC controller determines that a laser/scanner has failed when any of the following conditions occurs: ● Laser failure: The detected laser intensity does not match a specified value when the product initializes. ● Scanner motor startup failure: The scanner motor does not
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 52
    Figure 1-9 Protective-glass cleaners (PGCs) 20 Chapter 1 Theory of operation ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 53
    Image-formation system The image-formation system creates the printed image on the paper. The system consists of the following components: ● Print cartridges ● ITB ● Secondary transfer roller ● Fuser ● Laser /scanner units The DC controller controls the laser scanner unit and each of the high-
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 54
    Figure 1-11 Image-formation drive system M2 Fuser motor Primary charging roller Developing roller Primary charging roller Developing roller Primary charging roller Developing roller Primary charging roller Developing roller M3 Y drum motor M4 M drum motor M5 C drum motor M6 Bk drum motor
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 55
    Image-formation process The image-formation system consists of ten steps divided into six functional blocks. Figure 1-12 Image-formation process : Media path : Direction of drum rotation : Block Delivery : Step ITB cleaning 9. ITB cleaning Fuser Transfer 8. Fusing 7. Separation 6. Secondary
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 56
    Step 1: Pre-exposure Light from the pre-exposure LED strikes the surface of the photosensitive drum to remove any residual electrical charges from the drum surface. Figure 1-13 Pre-exposure LED Photosensitive drum Step 2: Primary charging The primary-charging roller contacts the photosensitive drum
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 57
    Step 3: Laser-beam exposure The laser beam strikes the surface of the photosensitive drum in the areas where the image will form. The negative charge neutralizes in those areas, which are then ready to accept toner. Figure 1-15 Laser-beam exposure Laser beam Step 4: Development Toner acquires a
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 58
    Step 5: Primary transfer The positively charged primary-transfer rollers contact the ITB, giving the ITB a positive charge. The ITB attracts the negatively charged toner from the surface of each photosensitive drum, and the complete toner image transfers onto the ITB. Figure 1-17 Primary transfer
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 59
    Step 7: Separation The stiffness of the paper causes it to separate from the ITB as the ITB bends. The static-charge eliminator removes excess charge from the paper to make sure that the toner fuses correctly. Figure 1-19 Separation Secondary transfer opposed roller ITB Paper Secondary transfer
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 60
    Step 9: ITB cleaning The cleaning blade scrapes the residual toner off the surface of the ITB. The residual toner feed screw deposits residual toner in the toner collection box. Figure 1-21 ITB cleaning Residual toner feed screw ITB Cleaning blade Step 10: Drum cleaning The cleaning blade scrapes
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 61
    The DC controller rotates the drum motor to drive the photosensitive drum, developing roller, and the primary-charging roller. Figure 1-23 Print-cartridge system DC controller M10 Developing disengagement motor SR11: Developing disengagement sensor Developing unit SR1/SR2/SR3/SR4: Drum home
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 62
    of the cartridge reaches a specified time or the cartridge runs out of toner. Developing-roller engagement and disengagement The product can print in full-color mode or in black-only mode. To print in black-only mode, the product disengages the developing rollers in the cyan, magenta, and yellow
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 63
    developing disengagement cam. ● As the cam rotates, the developing unit engages with or separates from the photosensitive drum. When the print mode is full color, the developing units engage with the drums. When the print mode is black-only, only the black developing units engages with the drum. The
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 64
    ITB is engaged with all four photosensitive drums. The state for full-color printing. Black roller engaged The ITB is engaged with only the the ITB unit is replaced. If swapping ITB units between two products for troubleshooting purposes, be sure to return the ITB units to their original products
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 65
    disengaged> ITB SR9: Primary transfer disengagement sensor M2 Fuser motor SL1 Primary transfer disengagement solenoid Photosensitive drum Primary transfer roller Primary transfer roller disengagement cam YMC primary transfer roller slide plate
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 66
    sensor Toner collection box Calibration The product calibrates itself to maintain excellent print quality. Calibration corrects color-misregistration and color-density variation. During calibration, the product places a specific pattern of toner on the surface of the ITB. Sensors at the end of the
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 67
    Color-misregistration control Internal variations in the laser/scanners can cause the toner images to become misaligned. The colormisregistration control corrects the following problems: ● Horizontal scanning start position ● Horizontal scanning magnification ● Vertical scanning start position The
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 68
    the high-voltage biases to correct the problem under the following conditions: The image . ● A specified number of pages have printed. ● After a specific period of the completion of a previous DMAX ● The environment changes color misregistration control starts. 36 Chapter 1 Theory of operation ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 69
    Pickup, feed, and delivery system The pickup, feed, and delivery system uses a series of rollers to move the paper through the product. Figure 1-29 Paper path Duplex model only Simplex media path Duplex media path Reverse roller Fuser sleeve Pressure roller Secondary transfer roller MP tray
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 70
    SR14 Loop sensor 1 SR15 Loop sensor 2 SR20 TOP (top of page) sensor SR21 MP tray media-presence sensor SR22 Duplex re-pickup sensor (duplex models only) SR23 Cassette-media stack-surface sensor 1 SR24 Cassette-media stack-surface sensor 2 SR25 Cassette presence sensor SW4 Cassette
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 71
    Component M1 ITB motor M2 Fuser motor M7 Lifter motor M11 Duplex reverse motor (duplex models only) M13 Pickup motor CL1 Duplex re-pickup clutch (duplex models only) SL2 Duplex reverse solenoid (duplex models only) SL3 Multipurpose tray pickup solenoid SL4 Cassette pickup solenoid
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 72
    each pickup source to the fuser inlet ● Fuser-and-delivery block: From the fuser to the delivery destination ● Duplex block: From the duplex reverse unit to duplex re-pickup unit (for duplex models only) Figure 1-32 Three main units of the pickup, feed, and delivery system Fusing-and-delivery block
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 73
    or the cassettes, carries it through the secondary-transfer unit, and feeds it into the fuser. Figure 1-33 Pickup-and-feed unit Simplex media path Duplex media path Pickup-and-feed block Cassette pickup The sequence of steps for the cassette-tray pickup operation is the following: 1. The product is
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 74
    7. As the pickup arm lowers, the cassette pickup roller touches the surface of the paper stack. 8. One sheet of paper feeds into the product. Figure 1-34 Cassette-pickup mechanism DC controller Cassette pickup cam Pickup motor M13 Cassette feed roller Cassette pickup roller Cassette feed roller
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 75
    Cassette lift operation and cassette paper-presence detection The product keeps the paper stack surface at the correct pickup position. The cassette lift-up operation is performed under the following conditions: ● The product is turned on ● The cassette is inserted ● The paper stack surface in the
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 76
    The low friction force between the sheets weakens the driving force from the cassette feed roller. Therefore, the separation roller is driven by its own driving force and holds back any multiple-fed sheets from the cassette. Figure 1-36 Multiple-feed prevention Cassette feed roller Cassette pickup
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 77
    up from the multipurpose tray is fed to the registration unit as the pickup motor rotates. The duplex model has the duplex feed clutch. The driving force of the pickup motor is transmitted to the duplex re-pickup roller by turning on the clutch. 2. The registration shutter corrects the skew-feed
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 78
    paper size specified by the formatter. Figure 1-38 Paper-feed mechanism DC controller ITB Pickup motor M13 Media sensor M1 ITB motor TOP sensor SR20 Duplex re-pickup clutch CL1 Registration shutter Duplex re-pickup roller Registration front feed roller 46 Chapter 1 Theory of operation ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 79
    Skew-feed prevention The product can straighten the paper without slowing the feed operation. 1. The leading edge of paper strikes the registration shutter, and the leading edge is aligned with the shutter. 2. As the feed rollers keep pushing the paper, the paper warps. 3. When the force is great
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 80
    OHT), but the media sensor detects another paper type. ● The specified print mode is not auto or OHT, but the media sensor detects OHT. Duplex printing ● The media sensor detects OHT. The DC controller flashes the media sensor during the initial rotation period under the following conditions: ● The
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 81
    a specified time. Figure 1-40 Fuser and delivery unit Simplex media path Duplex media path Fusing-and-delivery block SR6 Face-down tray media full sensor failure occurs because the pressure roller pulls the paper. To prevent these problems, loop sensor 1 and loop sensor 2 detect the paper loop
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 82
    sensor 2 is for heavy media. The DC controller slows the fuser motor when the sensor is off and speeds up the sensor when the sensor is on. Figure 1-41 Loop-control mechanism Pressure roller SR15: Loop sensor 2 SR14: Loop sensor 1 For heavy media For light media Sensor flag Pressure roller
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 83
    Pressure-roller pressurization control To prevent excessive wear on the pressure roller and help with jam-clearing procedures, the pressure roller pressurizes only during printing and standby. The DC controller reverses the fuser motor. The fuser motor rotates the fuser pressure-release cam. Figure
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 84
    Duplexing unit (HP Color LaserJet CP4525dn, HP Color LaserJet CP4025dn, and HP Color LaserJet CP4525xh only) For supported models, the duplexing unit reverses the paper and feeds it through the paper path to print the second side. Figure 1-43 Duplexing unit Simplex media path Duplex media path
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 85
    . Figure 1-44 Duplex reverse and feed control Duplex reverse unit Duplex flapper M11 SL2 Duplex reverse motor Duplex reverse solenoid Duplex feed unit Pickup motor CL1 M13 Duplex re-pickup clutch Duplex re-pickup position Simplex media path Duplex media path Duplex print operation The
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 86
    media-feed mode for each two-sided print job. Duplex printable media size (A4, Letter, B5, Legal and Executive) and designated print mode (Auto, Normal, Heavy media 1, Heavy media 2 (120 g/m2 or lighter), Glossy media 1,
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 87
    delivery sensor (SR5) ● TOP (top of page) sensor (SR20) ● Loop sensor 1 (SR14) ● Loop sensor 2 (SR15) ● Duplex re-pickup sensor (SR22) Figure 1-45 Jam detection sensors Duplex model only Simplex media path Duplex media path SR5 SR14 SR15 SR20 SR22 The product determines that a jam has occurred if
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 88
    re-pickup sensor does not detect the leading edge of the paper within a specified period after the media reverse operation starts in the duplex reverse unit. Duplexing re-pickup jam 2 The TOP sensor does not detect the leading edge of the paper within a specified period after the paper is re
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 89
    Optional paper feeder The 1 x 500-sheet paper feeder is optionally installed at bottom of the product. The paper feeder picks up the print media and feeds it to the product. There are two types of paper feeders: 1 x 500-sheet paper feeder and 3 x 500-sheet paper feeder. The operational sequence of
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 90
    Figure 1-47 3 x 500-sheet optional paper feeder PD feed roller PD pickup roller PD separation roller Figure 1-48 Signals for the paper feeder DC controller +3.3V +24V Paper deck controller Paper deck Motor Solenoid Photointerrupter Switch The input trays contain several motors, solenoids,
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 91
    Table 1-17 Electrical components for the paper feeder Component type Abbreviation Component name Motors M1 PD lifter motor 1 M2 PD pickup motor M3 PD lifter motor 2 (3 x 500-sheet paper feeder only) M4 PD lifter motor 3 (3 x 500-sheet paper feeder only) Solenoids SL1 PD pickup solenoid
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 92
    Component PD lifter motor 3 (3 x 500-sheet paper M4 feeder only) PD pickup motor M2 Drives Lifter of the lower cassette Failure detection No PD pickup roller, PD feed roller, and PD No separation roller Paper-feeder pickup and feed operation The paper feeder picks up one sheet from the paper-
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 93
    Table 1-18 Pickup feed components (1 x 500-sheet paper feeder) (continued) Component SR3 Tray 3 paper presence sensor SR4 Tray 3 paper present sensor SW2 Tray 3 paper size switches SW2 SW3 SW4 M2 Pickup arm SR2 SR3 SR1 SR8 M1 SR6 SR5 M3 SR11 SR9 SR12 SR4 SL1 SR7 SW1 SL2 SR10 SL3
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 94
    SR5 SR6 SR7 SR8 SR9 SR10 SR11 SR12 SW1 SW2 SW3 SW4 Tray 4 paper surface sensor 1 (3 x 500-sheet paper feeder only) Tray 4 paper surface sensor 2 (3 x 500-sheet paper feeder only) Tray 4 feed sensor (3 x 500-sheet paper feeder only) Tray 4 media-stack-surface sensor (3 x 500-sheet paper feeder only)
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 95
    tray media-stack-surface sensor does not detect a stack surface within a specified period after the PD lifter motor starts rotating, the paper feeder driver determines that the PD lifter motor has failed and through the DC controller notifies the formatter. Figure 1-50 Paper-feeder cassette lift PD
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 96
    Paper feeder jam detection The 1 x 500-sheet paper feeder uses the tray 3 paper presence sensor (SR4) to detect the presence of paper and to check whether paper has jammed. Figure 1-51 Jam detection (1 x 500-sheet paper feeder) SR4 The 1 x 500-sheet paper feeder detects the following jams: ● 1 x
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 97
    Figure 1-52 Jam detection (3 x 500-sheet paper feeder) SR4 SR7 SR10 The 3 x 500-sheet paper feeder detects the following jams: ● 3 x 500-sheet PD pickup delay jam: One of the tray feed sensors does not detect the leading edge of paper within a specified time (including two retries) after the
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 98
    66 Chapter 1 Theory of operation ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 99
    2 Removal and replacement ● Introduction ● Removal and replacement strategy ● Electrostatic discharge ● Required tools ● Before performing service ● After performing service ● Post-service test ● Parts removal order ● Customer self repair (CSR) components ● External panels, covers, and doors ●
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 100
    HP does not support repairing individual subassemblies or troubleshooting to the component level. Note the length, diameter, color lance points, or wire-harness guides and retainers. Removal and troubleshooting. However, disconnect the power supply during parts removal. Never operate or service
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 101
    Electrostatic discharge CAUTION: Some parts are sensitive to electrostatic discharge (ESD). Look for the ESD reminder when removing product parts. Always perform service work at an ESD-protected workstation or mat, or use an ESD strap. If an ESD workstation, mat, or strap is not available, ground
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 102
    the product from the optional paper feeder by yourself. Three people are required to lift the product off of the feeder. After performing service ● Plug in the power cable. ● Reinstall the print cartridges. ● Reinstall the tray cassette or cassettes. ● If the optional paper feeder was installed
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 103
    Post-service test Perform the following test to verify that the repair or replacement was successful. Print-quality test 1. Verify that you meets expectations. 8. If necessary, restore any customer-specified settings. 9. Clean the outside of the product with a damp cloth. ENWW Post-service test 71
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 104
    Parts removal order Figure 2-2 Parts removal order (1 of 2) 72 Chapter 2 Removal and replacement ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 105
    Figure 2-3 Parts removal order (2 of 2) DCCA 2T assembly DCCA DCCA HVPS-upper DCCA HVPS-upper HVPS-upper DCCA DCCA HVPS-upper HVPS-upper ENWW Parts removal order 73
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 106
    Customer self repair (CSR) components Print cartridges CAUTION: If toner gets on your clothing, wipe it off with a dry cloth and wash clothing in cold water. Hot water sets toner into fabric. 1. Open the front door. Make sure that the door is completely open. Figure 2-4 Remove the print cartridge (1
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 107
    2. Grasp the print-cartridge handle and pull out to remove. CAUTION: Do not touch the green roller. Doing so can damage the cartridge. Do not expose the cartridge to strong light. Cover the cartridge with a sheet of paper to protect it from light. Reinstallation tip Align the print cartridge with
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 108
    reuse it. Doing so could cause toner to spill inside the product and result in reduced print quality. For recycling information, see the product user guide. 1. Open the front door. Make sure that the door is completely open. Figure 2-6 Remove the toner-collection unit (1 of 4) 2. Grasp the top of
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 109
    3. To prevent toner spills, place the blue cap (callout 1) over the blue opening at the top of the unit (callout 2). Figure 2-8 Remove the toner-collection unit (3 of 4) 2 1 Figure 2-9 Remove the toner-collection unit (4 of 4) ENWW Customer self repair (CSR) components 77
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 110
    Formatter PCA CAUTION: ESD sensitive component. 1. Turn the product off and disconnect the power and interface cable or interface cables. 2. Unscrew the formatter thumb screws, and then firmly pull the formatter from the product. Place the formatter on a clean, flat, grounded surface. Figure 2-10
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 111
    Hard drive Before proceeding, remove the following components: ● Formatter PCA. See Formatter PCA on page 78. Remove the hard drive CAUTION: ESD sensitive component. 1. Disconnect two connectors. Figure 2-11 Remove the hard drive (1 of 3) 2. Release one tab. Figure 2-12 Remove the hard drive
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 112
    3. Rotate the hard drive assembly away from the formatter until the slots in the hinges are aligned with the elongated hinge pins, and then slide the hard drive assembly off the hinge pins. Figure 2-13 Remove the hard drive (3 of 3) 1 2 80 Chapter 2 Removal and replacement ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 113
    Memory DIMM Before proceeding, remove the following components: ● Formatter PCA. See Formatter PCA on page 78. Remove the memory DIMM CAUTION: ESD sensitive component. NOTE: See Enable memory on page 82 after installing a new memory DIMM. 1. Place the formatter on a clean, flat, grounded
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 114
    1. Click Start. Windows Server 2008, and Windows Vista 2. Click Settings. 3. Click Printers and Faxes (using the default Start menu view) or click Printers (using the Classic Start menu view). 4. Right-click the product driver icon, and then select Properties. 5. Click the Device Settings tab
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 115
    product driver icon, and then select Printer properties. 4. Click the Device Settings tab. 5. Expand the area for Installable Options. 6. Next to Automatic Configuration, select Update Now. 7. Click OK. NOTE: If the memory is not updated correctly after using the Update Now option, you can manually
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 116
    Tray NOTE: Use this procedure to remove Tray 2 and the optional Trays 3, 4, and 5. 1. Pull the tray straight out of the product until it stops. Figure 2-16 Remove the tray (1 of 2) 2. Carefully lift up on the tray to release it, and then remove the tray. Figure 2-17 Remove the tray (2 of 2) 84
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 117
    cool. NOTE: The product detects a new fuser using a fusible link that blows after 100 pages have been printed. If a new fuser is installed for troubleshooting purposes, be sure to remove it before printing 100 pages. 1. Open the right-door assembly. Figure 2-18 Remove the fuser (1 of 2) 2. Grasp the
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 118
    rollers (Trays 2-5) CAUTION: Do not touch the spongy roller surface unless you are replacing the roller. Skin oils on the roller can cause paper pickup problems. 1. Locate the feed and separation rollers for the tray. TIP: You do not have to separate the product from the feeder to remove these
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 119
    (Tray 1) CAUTION: Do not touch the spongy roller surface unless you are replacing the roller. Skin oils on the roller can cause paper pickup problems. 1. Open Tray 1. Figure 2-21 Remove the pickup roller (Tray 1) (1 of 5) 2. Push the top edge of the cover to release the tabs. Figure 2-22 Remove
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 120
    3. Open the right-door assembly, and then remove the cover. Figure 2-23 Remove the pickup roller (Tray 1) (3 of 5) 4. Release the two blue tabs. Figure 2-24 Remove the pickup roller (Tray 1) (4 of 5) 88 Chapter 2 Removal and replacement ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 121
    5. Rotate the roller body away from the product to remove it. Figure 2-25 Remove the pickup roller (Tray 1) (5 of 5) ENWW Customer self repair (CSR) components 89
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 122
    CAUTION: Do not touch the spongy roller surface unless you are replacing the roller. Skin oils on the roller can cause image quality problems. 1. Open the right-door assembly. Figure 2-26 Remove the transfer roller (1 of 3) 2. Use the blue lever to lower the secondary transfer assembly. Figure
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 123
    3. Grasp the roller shaft collars, and lift the transfer roller off of the product. Figure 2-28 Remove the transfer roller (3 of 3) Reinstall the transfer roller When you reinstall the transfer roller, make sure that the pins on the shaft collars align with the holes in the mounting assembly. After
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 124
    Intermediate transfer belt (ITB) CAUTION: Do not touch the black-plastic belt. Skin oils and fingerprints on the belt can cause printquality problems. Always place the ITB on a flat surface in a safe and protected location. 1. Open the right-door assembly. Figure 2-30 Remove the intermediate
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 125
    3. Grasp the small handles on the ITB and then pull the ITB out of the product until two large handles expand along the right- and left-side of the ITB. Figure 2-32 Remove the intermediate transfer belt (3 of 4) ENWW Customer self repair (CSR) components 93
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 126
    4. Grasp the large handles on the ITB and then pull the ITB straight out of the product to remove it. CAUTION: The ITB is a sensitive component. Be careful when handling the ITB so that it is not damaged. Always place the ITB in a safe and protected location. Figure 2-33 Remove the intermediate
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 127
    External panels, covers, and doors Identification and location Figure 2-34 External panels, covers, and doors; identification and location 1 12 11 2 3 10 4 9 5 8 6 7 Item 1 2 3 4 5 6 Description Item Rear-top cover (see Rear-top cover 7 on page 102) Right-door assembly (see Right-door
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 128
    Upper-left cover 1. Open the front-door assembly. Figure 2-35 Remove the upper-left cover (1 of 3) 2. Remove one screw. Figure 2-36 Remove the upper-left cover (2 of 3) 96 Chapter 2 Removal and replacement ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 129
    3. Release two tabs, slightly push the cover upward and toward the rear of the product, pull outward on the rear corner, and then remove the upper-left cover. Figure 2-37 Remove the upper-left cover (3 of 3) ENWW External panels, covers, and doors 97
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 130
    Power-supply cover ▲ Remove one screw (callout 1), release one tab (callout 2), and then remove the power-supply cover (callout 3). Figure 2-38 Remove the power-supply cover 2 3 1 98 Chapter 2 Removal and replacement ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 131
    Left cover Before proceeding, remove the following components: ● Upper-left cover. See Upper-left cover on page 96. ● Power-supply cover. See Power-supply cover on page 98. Remove the left cover 1. Open the front-door assembly. 2. Remove four screws. Figure 2-39 Remove the left cover (1 of 2) 3.
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 132
    Front-top cover Before proceeding, remove the following components: ● Upper-left cover. See Upper-left cover on page 96. Remove the front-top cover 1. Open the front-door assembly. 2. Remove three screws. Figure 2-41 Remove the front-top cover (1 of 3) 3. Flex the back left corner of the cover and
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 133
    4. Remove the cover. Figure 2-43 Remove the front-top cover (3 of 3) ENWW External panels, covers, and doors 101
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 134
    Rear-top cover Before proceeding, remove the following components: ● Upper-left cover. See Upper-left cover on page 96. ● Front-top cover. See Front-top cover on page 100. Remove the rear-top cover 1. Remove two screws. Figure 2-44 Remove the rear-top cover (1 of 2) 2. Open the right-door assembly.
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 135
    Right-front cover Before proceeding, remove the following components: ● Upper-left cover. See Upper-left cover on page 96. ● Front-top cover. See Front-top cover on page 100. ● Rear-top cover. See Rear-top cover on page 102. Remove the right-front cover NOTE: Be careful. When removing the cover, do
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 136
    2. Release two tabs, and then remove the right-front cover. Figure 2-48 Remove the right-front cover (3 of 3) Reinstall the power button Snap the power button into the holders on the cover. Make sure that the spring is correctly installed. Figure 2-49 Reinstall the power button 104 Chapter 2
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 137
    Control-panel assembly Before proceeding, remove the following components: ● Upper-left cover. See Upper-left cover on page 96. ● Front-top cover. See Front-top cover on page 100. ● Rear-top cover. See Rear-top cover on page 102. ● Right-front cover. See Right-front cover on page 103. Remove the
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 138
    2. Disconnect one connector, and then remove the control-panel assembly. Figure 2-51 Remove the control-panel assembly (2 of 2) 106 Chapter 2 Removal and replacement ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 139
    Front-door assembly Before proceeding, remove the following components: ● Upper-left cover. See Upper-left cover on page 96. ● Front-top cover. See Front-top cover on page 100. ● Rear-top cover. See Rear-top cover on page 102 ● Right-front cover. See Right-front cover on page 103 Remove the front-
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 140
    3. Squeeze the tab on the left link arm using needle nose pliers to release it from the front door assembly. NOTE: Hold the link arm firmly when releasing to prevent it from snapping against the front of the product. Figure 2-53 Remove the front-door assembly (2 of 5) 4. Remove two screws (callout
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 141
    5. Remove two screws. Figure 2-55 Remove the front-door assembly (4 of 5) 6. Remove the front-door assembly. Figure 2-56 Remove the front-door assembly (5 of 5) ENWW External panels, covers, and doors 109
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 142
    Right-rear cover Before proceeding, remove the following components: ● Upper-left cover. See Upper-left cover on page 96. ● Front-top cover. See Front-top cover on page 100. ● Rear-top cover. See Rear-top cover on page 102. Remove the right-rear cover 1. Open the right-door assembly. 2. Release one
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 143
    3. Lift the cover to remove. Figure 2-58 Remove the right-rear cover (2 of 2) ENWW External panels, covers, and doors 111
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 144
    Rear cover Before proceeding, remove the following components: ● Upper-left cover. See Upper-left cover on page 96. ● Power-supply cover. See Power-supply cover on page 98, ● Front-top cover. See Front-top cover on page 100. ● Rear-top cover. See Rear-top cover on page 102. Remove the rear cover ▲
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 145
    Right-door assembly 1. Open the right-door assembly. Figure 2-60 Remove the right-door assembly (1 of 9) 2. Carefully remove the hinge cover (callout 1). Figure 2-61 Remove the right-door assembly (2 of 9) 1 ENWW External panels, covers, and doors 113
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 146
    3. Remove three screws. Figure 2-62 Remove the right-door assembly (3 of 9) 4. Remove the hinge assembly. Reinstallation tip When the hinge is reinstalled, make sure that the tab (callout 1) is correctly positioned on the door. Figure 2-63 Remove the right-door assembly (4 of 9) 1 114 Chapter 2
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 147
    5. Release one pin, and then release the link arm (callout 1). CAUTION: The link arm is spring loaded. Hold the arm securely (as shown) to prevent the spring from abruptly retracting. Figure 2-64 Remove the right-door assembly (5 of 9) 1 6. Release one tab, and then remove the cover (callout 1). TIP
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 148
    7. Disconnect two connectors. Figure 2-66 Remove the right-door assembly (7 of 9) 8. Lift two link arms to release. Figure 2-67 Remove the right-door assembly (8 of 9) 116 Chapter 2 Removal and replacement ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 149
    9. Slide the right-door assembly toward the front of the product and remove. Figure 2-68 Remove the right-door assembly (9 of 9) ENWW External panels, covers, and doors 117
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 150
    some photos in this chapter show components removed that would not be removed to service the product. If necessary, remove the components listed at the beginning of a procedure before proceeding to service the product. Cassette feed guide TIP: If a page is jammed in the product, you might be able to
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 151
    Secondary transfer assembly The secondary transfer assembly includes the transfer roller. 1. Open the right-door assembly. Figure 2-71 Remove the secondary transfer assembly (1 of 3) 2. Release one tab and carefully remove the stopper. NOTE: You might have to slightly lift up on the corner of the
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 152
    3. Remove the secondary transfer assembly. CAUTION: Do not damage the blue release lever when removing the assembly. Figure 2-73 Remove the secondary transfer assembly (3 of 3) Reinstall the secondary transfer assembly Press and hold the blue release lever when you reinstall the assembly. Figure 2-
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 153
    Separation pad (Tray 1) Before proceeding, remove the following components: ● Pickup roller. See Pickup roller (Tray 1) on page 87. ● Right door assembly. See Right-door assembly on page 113. Remove the separation pad (Tray 1) 1. Remove two screws (callout 1) and the cover (callout 2). Figure 2-75
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 154
    3. Release two tabs (callout 1) and slide the locking cap and sub roller toward the edge of the tray. Figure 2-77 Remove the separation pad (3 of 6) 1 4. Release two tabs (callout 1) and slide the locking cap and sub roller toward the edge of the tray. CAUTION: Do not damage the flag (callout 2).
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 155
    5. Release one tab (callout 1) and slide the pickup-roller holder toward the edge of the tray. CAUTION: Do not damage the flag (callout 2). Figure 2-79 Remove the separation pad (5 of 6) 2 1 6. Release one tab (callout 1) and remove the separation pad. Figure 2-80 Remove the separation pad (6 of
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 156
    Registration density (RD) sensor assembly Before proceeding, remove the following components: ● Intermediate transfer belt (ITB). See Intermediate transfer belt (ITB) on page 92. ● Secondary transfer assembly. See Secondary transfer assembly on page 119. Remove the RD sensor assembly 1. Release one
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 157
    2. Release one tab, and then remove the wire-harness cover. TIP: Open the front door to make it easier to remove the cover. Figure 2-83 Remove the RD sensor assembly (3 of 7) 3. Disconnect three connectors. Figure 2-84 Remove the RD sensor assembly (4 of 7) ENWW Internal assemblies 125
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 158
    4. Remove two screws. Figure 2-85 Remove the RD sensor assembly (5 of 7) 5. Slide the shutter toward the back side of the product. Keep the shutter in this position for the following step. Figure 2-86 Remove the RD sensor assembly (6 of 7) 126 Chapter 2 Removal and replacement ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 159
    6. Carefully remove the assembly from the product. CAUTION: Do not damage the shutter as it passes through the chassis. Figure 2-87 Remove the RD sensor assembly (7 of 7) ENWW Internal assemblies 127
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 160
    Registration assembly Before proceeding, remove the following components: ● Intermediate transfer belt (ITB). See Intermediate transfer belt (ITB) on page 92. ● Secondary transfer assembly. See Secondary transfer assembly on page 119. 128 Chapter 2 Removal and replacement ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 161
    is installed, you must use the control-panel menus to reset the registration-roller count and input the media sensor value. See Service menu on page 420 and Service menu on page 420. 1. Release one tab (callout 1), and then remove the cover (callout 2). Figure 2-88 Remove the registration assembly
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 162
    2. Release one tab, and then remove the wire-harness cover. TIP: To make the cover easier to remove, open the front-door assembly to close the RD-sensor shutter. Figure 2-90 Remove the registration assembly (3 of 8) 3. Disconnect two connectors. Figure 2-91 Remove the registration assembly (4 of 8)
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 163
    4. Remove two screws (callout 1), and then remove the cassette feed guide (callout 2). Figure 2-92 Remove the registration assembly (5 of 8) 2 1 5. Remove four screws. Figure 2-93 Remove the registration assembly (6 of 8) ENWW Internal assemblies 131
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 164
    6. Release two pins and the front of the assembly. Figure 2-94 Remove the registration assembly (7 of 8) 7. Remove the assembly from the product. Reinstallation tip When you reinstall the registration assembly, make sure that it is correctly positioned in the product. The tabs on the assembly must
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 165
    Residual-toner-feed motor Before proceeding, remove the following components: ● Intermediate transfer belt (ITB). See Intermediate transfer belt (ITB) on page 92. ● Upper-left cover. See Upper-left cover on page 96. Remove the residual-toner-feed motor Remove one screw (callout 1), disconnect one
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 166
    Residual-toner duct and feed assembly Before proceeding, remove the following components: ● Toner-collection unit. See Toner-collection unit on page 76. ● Intermediate transfer belt (ITB). See Intermediate transfer belt (ITB) on page 92. ● Upper-left cover. See Upper-left cover on page 96. ●
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 167
    2. Release one tab, and then remove the waste toner duct. Figure 2-98 Remove the residual-toner duct and feed assembly (2 of 4) 3. Remove one screw. Figure 2-99 Remove the residual-toner duct and feed assembly (3 of 4) ENWW Internal assemblies 135
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 168
    4. Push the residual-toner feed assembly into the product and then remove through the print cartridge cavity. CAUTION: The waste toner feed assembly contains toner. Place a cloth below the work area to catch any spilled toner. Figure 2-100 Remove residual-toner duct and feed assembly (4 of 4) 136
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 169
    Cartridge fan and environmental sensor Before proceeding, remove the following components: ● Upper-left cover. See Upper-left cover on page 96. ● Power-supply cover. See Power-supply cover on page 98. ● Left cover. See Left cover on page 99. Remove the cartridge fan and environmental sensor 1.
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 170
    2. Release one spring. TIP: Close the front-door assembly to reduce tension in the spring. Figure 2-102 Remove the cartridge fan and environmental sensor (2 of 7) 3. Release one tab and then slide the fan assembly toward the back of the product. Figure 2-103 Remove the cartridge fan and
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 171
    4. Pull the fan assembly out of the product, and then disconnect two connectors. TIP: One connector is below the sponge. Figure 2-104 Remove the cartridge fan and environmental sensor (4 of 7) 5. Release two tabs (callout 1), and then remove the cover (callout 2). Figure 2-105 Remove the cartridge
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 172
    6. Disconnect one connector (callout 1), and then remove the fan (callout 2). Figure 2-106 Remove the cartridge fan and environmental sensor (6 of 7) 2 1 7. Carefully release one tab, and then remove the environmental sensor. CAUTION: ESD-sensitive part. Figure 2-107 Remove the cartridge fan
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 173
    Toner-collection sensor and scanner-thermistor assembly Before proceeding, remove the following components: ● Toner-collection unit. See Toner-collection unit on page 76. ● Upper-left cover. See Upper-left cover on page 96. ● Power-supply cover. See Power-supply cover on page 98. ● Left cover. See
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 174
    2. Open the front-door assembly, and then remove one screw. Figure 2-109 Remove the toner-collection sensor and scanner-thermistor assembly (2 of 3) 3. Disconnect two connectors (callout 1), and then remove the toner-collection sensor and scannerthermistor assembly (callout 2). Figure 2-110 Remove
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 175
    Delivery fan Before proceeding, remove the following components: ● Upper-left cover. See Upper-left cover on page 96. ● Front-top cover. See Front-top cover on page 100. ● Rear-top cover. See Rear-top cover on page 102. Remove the delivery fan 1. Remove one screw (callout 1), disconnect one
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 176
    2. Release one tab (callout 1), and then remove the delivery fan (callout 2). Figure 2-112 Remove the delivery fan (2 of 2) 2 1 144 Chapter 2 Removal and replacement ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 177
    Delivery assembly Before proceeding, remove the following components: ● Fuser. See Fuser on page 85. ● Intermediate transfer belt (ITB). See Intermediate transfer belt (ITB) on page 92. ● Upper-left cover. See Upper-left cover on page 96. ● Power-supply cover. See Power-supply cover on page 98. ●
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 178
    (callout 1), and then remove the paper guide (callout 2). NOTE: Duplex models only: press the duplex solenoid (callout 3) to create enough clearance to remove the paper guide (callout 2). TIP: The fuser delivery sensor is installed on the rear of the paper guide. Leave the sensor attached to the
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 179
    4. Remove two screws. Figure 2-116 Remove the delivery assembly (4 of 7) 5. Pull one tab out, and then push the tab down to release the bushing. Figure 2-117 Remove the delivery assembly (5 of 7) ENWW Internal assemblies 147
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 180
    6. Remove two screws. Figure 2-118 Remove the delivery assembly (6 of 7) 7. Remove the assembly. Figure 2-119 Remove the delivery assembly (7 of 7) 148 Chapter 2 Removal and replacement ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 181
    , the output-bin full sensor must be removed from the discarded assembly, and then installed on the replacement assembly. 1. Duplex models only: Make sure that the solenoid plunger is correctly installed on the replacement assembly. Figure 2-120 Reinstall the delivery assembly (1 of 4) 2. For all
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 182
    b. Hold the delivery assembly with the diverter (callout 1) in the depressed position to move the sensor flag (callout 2) away from the sensor. Release one tab (callout 3). Figure 2-122 Reinstall the delivery assembly (3 of 4) 1 2 3 c. Slide the sensor up toward the top of the delivery assembly to
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 183
    assembly on page 105. ● Delivery fan. See Delivery fan on page 143. ● Delivery assembly. See Delivery assembly on page 145. Remove the duplex-drive assembly ▲ Disconnect two connectors (callout 1), remove three screws (callout 2), and then remove the assembly (callout 3). Figure 2-124 Remove the
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 184
    Power-supply fan Before proceeding, remove the following components: ● Upper-left cover. See Upper-left cover on page 96. ● Power-supply cover. See Power-supply cover on page 98. ● Front-top cover. See Front-top cover on page 100. ● Rear-top cover. See Rear-top cover on page 102. ● Right-rear cover.
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 185
    then install it into a different product. Failure to follow this warning will result in severe damage to that product and cause it to be unusable. HP recommends that if you remove and replace the ICB, you should destroy the discarded ICB so that it can not accidentally be installed in a different
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 186
    2. Carefully rotate and slide the ICB up and away from the chassis, disconnect one connector, and then remove the ICB. Figure 2-127 Remove the ICB (2 of 2) 154 Chapter 2 Removal and replacement ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 187
    DC controller PCA only NOTE: Use the following procedure to replace only the DC controller PCA. To access components behind the DC controller, remove the PCA and the sheet-metal backing tray. See DC controller PCA and tray on page 161. Before proceeding, remove the following components: ● Upper-
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 188
    2. Remove four screws (callout 1), and then remove the DC controller PCA. Figure 2-129 Remove the DC controller PCA only (2 of 2) 156 Chapter 2 Removal and replacement ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 189
    Low-voltage power supply (LVPS) Before proceeding, remove the following components: ● Formatter. See Formatter PCA on page 78. ● Upper-left cover. See Upper-left cover on page 96. ● Power-supply cover. See Power-supply cover on page 98. ● Left cover. See Left cover on page 99. ● Front-top cover. See
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 190
    on page 281. Figure 2-131 Remove the low-voltage power supply (1 of 6) 3. Disconnect one connector, and then release the wire harness from the guide. Reinstallation tip Make sure that you reconnect this connector when the power supply is reinstalled. Figure 2-132 Remove the low-voltage power supply
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 191
    4. Remove three screws. Figure 2-133 Remove the low-voltage power supply (3 of 6) 5. Remove three screws. Reinstallation tip When the low-voltage power supply is reinstalled, make sure the tab on the mounting bracket behind the bottom screw (callout 1), is inserted in the slot in the product
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 192
    6. Slide the bottom of the assembly away from the product, tip the top of the assembly away from the product, and then remove the assembly. Figure 2-135 Remove the low-voltage power supply (5 of 6) 2 1 7. Place the assembly on a flat surface. Remove two screws (callout 1), and then separate the
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 193
    DC controller PCA and tray Before proceeding, remove the following components: ● Upper-left cover. See Upper-left cover on page 96. ● Power-supply cover. See Power-supply cover on page 98. ● Front-top cover. See Front-top cover on page 100. ● Rear-top cover. See Rear-top cover on page 102. ● Rear
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 194
    2. Remove two screws. Figure 2-138 Remove the DC controller PCA and tray (2 of 3) 3. Disengage three tabs (two along the left edge of the PCA and one at the top-right corner of the PCA). Figure 2-139 Remove the DC controller PCA and tray (3 of 3) 162 Chapter 2 Removal and replacement ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 195
    High-voltage power supply lower (HVPS-D) Before proceeding, remove the following components: ● Formatter. See Formatter PCA on page 78. ● Upper-left cover. See Upper-left cover on page 96. ● Power-supply cover. See Power-supply cover on page 98. ● Left cover. See Left cover on page 99. ● Front-top
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 196
    2. Remove three screws. Figure 2-141 Remove the high-voltage power supply lower (2 of 7) 164 Chapter 2 Removal and replacement ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 197
    3. Release four locking clips. NOTE: Squeeze each locking clip to remove. Figure 2-142 Remove the high-voltage power supply lower (3 of 7) Figure 2-143 Remove the high-voltage power supply lower (4 of 7) ENWW Internal assemblies 165
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 198
    4. Release five tabs. Figure 2-144 Remove the high-voltage power supply lower (5 of 7) 5. Rotate the top of the power supply away from the chassis, and then disconnect two connectors on the back of the power supply. NOTE: Remove the FFC (callout 1) with the high-voltage power supply PCA. Do not
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 199
    (callout 2) and then remove the power supply. NOTE: Remove the FFC (callout 1) and guide (callout 2) with the PCA. Replacement high-voltage power supply PCAs have the FFC and guide installed. Figure 2-146 Remove the high-voltage power supply lower (7 of 7) 1 2 Reinstall the high-voltage power supply
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 200
    Developing-disengagement motor Before proceeding, remove the following components: ● Formatter. See Formatter PCA on page 78. ● Upper-left cover. See Upper-left cover on page 96. ● Power-supply cover. See Power-supply cover on page 98. ● Left cover. See Left cover on page 99. ● Front-top cover. See
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 201
    Exhaust fan and fan duct Before proceeding, remove the following components: ● Formatter. See Formatter PCA on page 78. ● Upper-left cover. See Upper-left cover on page 96. ● Power-supply cover. See Power-supply cover on page 98. ● Left cover. See Left cover on page 99. ● Front-top cover. See Front-
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 202
    2. Release five tabs (callout 1) and remove the cover (callout 2). Figure 2-150 Remove the exhaust fan and fan duct (2 of 3) 2 1 3. Disconnect one connector, and then remove the fan from the duct. Figure 2-151 Remove the exhaust fan and fan duct (3 of 3) 170 Chapter 2 Removal and replacement ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 203
    Reinstall the exhaust fan and fan duct Be sure that the toroid (callout 1) is correctly aligned in the FFC cable guide before attempting to reinstall the exhaust fan and duct. Figure 2-152 Reinstall the exhaust fan and fan duct 1 ENWW Internal assemblies 171
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 204
    Pickup motor Before proceeding, remove the following components: ● Formatter. See Formatter PCA on page 78. ● Upper-left cover. See Upper-left cover on page 96. ● Power-supply cover. See Power-supply cover on page 98. ● Left cover. See Left cover on page 99. ● Front-top cover. See Front-top cover on
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 205
    Lifter-drive assembly Before proceeding, remove the following components: ● Formatter. See Formatter PCA on page 78. ● Intermediate transfer belt (ITB). See Intermediate transfer belt (ITB) on page 92. ● Upper-left cover. See Upper-left cover on page 96. ● Power-supply cover. See Power-supply cover
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 206
    2. Disconnect one connector (callout 1), and then remove two screws (callout 2). Figure 2-155 Remove the lifter-drive assembly (2 of 3) 1 2 3. Remove the lifter-drive assembly from the product. CAUTION: The spring on the assembly is not captive. Do not lose the spring when the assembly is removed
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 207
    Lifter base assembly Before proceeding, remove the following components: ● Formatter. See Formatter PCA on page 78 ● Upper-left cover. See Upper-left cover on page 96. ● Power-supply cover. See Power-supply cover on page 98. ● Left cover. See Left cover on page 99. ● Front-top cover. See Front-top
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 208
    2. From inside the Tray 2 cavity, remove four screws, and then remove the lifter base assembly. NOTE: Pull the assembly straight from the product without tipping to prevent the spring from falling from the assembly. Reinstallation tip If the tray does not completely close when reinstalled, push on
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 209
    2. Place the spring in the lifter before installing the assembly on the product. Figure 2-160 Reinstall the lifter base assembly (2 of 2) ENWW Internal assemblies 177
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 210
    Tray-pickup drive assembly Before proceeding, remove the following components: ● Formatter. See Formatter PCA on page 78. ● Upper-left cover. See Upper-left cover on page 96. ● Power-supply cover. See Power-supply cover on page 98. ● Left cover. See Left cover on page 99. ● Front-top cover. See
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 211
    DC controller and tray to provide additional space. See DC controller PCA and tray on page 161. You might also need to remove the wire guide from the main-drive assembly. See Figure 2-198 Remove the main-drive assembly (3 of 6) on page 205. Figure 2-163 Remove the tray-pickup drive assembly
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 212
    . See High-voltage power supply lower (HVPS-D) on page 163. Remove the tray-pickup assembly NOTE: This task requires that you remove three feed guides on the right side of the product before you can remove the tray-pickup assembly. 1. Remove one screw (callout 1), and then disconnect two connectors
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 213
    2. From the front of the product, remove one screw (callout 1), and then remove one tray rail (callout 2). Figure 2-165 Remove the tray-pickup assembly (2 of 11) 1 2 3. From the right side of the product, remove two screws (callout 1) and one cover (callout 2). Figure 2-166 Remove the tray-pickup
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 214
    -pickup assembly (4 of 11) 5. Open the right-door assembly. Lift the two link arms (callout 1) to release from the product, and then remove the paper guide (callout 2). Figure 2-168 Remove the tray-pickup assembly (5 of 11) 2 1 182 Chapter 2 Removal and replacement ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 215
    assembly. Push the two tabs toward each other, and then push up to release the feed guide. Figure 2-169 Remove the tray-pickup assembly (6 of 11) 7. Open the right-door assembly, and then remove the feed guide. Figure 2-170 Remove the tray-pickup assembly (7 of 11) ENWW Internal assemblies 183
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 216
    then remove two brackets (callout 2). Figure 2-171 Remove the tray-pickup assembly (8 of 11) 2 1 9. Release one tab (callout 1), and then slide the feed guide (callout 2) toward the front of the product to remove. Figure 2-172 Remove the tray-pickup assembly (9 of 11) 1 2 184 Chapter 2 Removal and
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 217
    10. Remove one screw. Figure 2-173 Remove the tray-pickup assembly (10 of 11) 11. Remove the tray-pickup assembly. Figure 2-174 Remove the tray-pickup assembly (11 of 11) ENWW Internal assemblies 185
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 218
    Laser/scanner assembly (Y/M) Before proceeding, remove the following components: ● Toner collection unit. See Toner-collection unit on page 76. ● Intermediate transfer belt (ITB). See Intermediate transfer belt (ITB) on page 92. ● Upper-left cover. See Upper-left cover on page 96. ● Power-supply
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 219
    Remove the laser/scanner assembly (Y/M) NOTE: After installing a new laser/scanner assembly, be sure to calibrate the product. See Calibrate the product on page 313. 1. Release one spring. CAUTION: The spring is not captive. Do not lose the spring when it is removed. Use a pair of needle-nose pliers
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 220
    one spring (callout 1), and then disconnect one FFC (callout 2). Reinstallation tip When reinstalled, the toroid (callout 3) must be correctly positioned on the wire guide (in the provided slots) so that the fan duct will fully seat in the product when it is reinstalled. Figure 2-177 Remove the
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 221
    4. Rotate the front of the laser/scanner assembly down (callout 1), and then slide it toward the right (callout 2). Lower the left corner, and then rotate the left corner out of the product (callout 3). Reinstallation tip When the scanner is reinstalled, make sure that the tab on the front of the
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 222
    Laser/scanner assembly (C/Bk) Before proceeding, remove the following components: ● Toner collection unit. See Toner-collection unit on page 76. ● Intermediate transfer belt (ITB). See Intermediate transfer belt (ITB) on page 92. ● Upper-left cover. See Upper-left cover on page 96. ● Power-supply
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 223
    Remove the laser/scanner assembly (C/Bk) NOTE: After installing a new laser/scanner assembly, be sure to calibrate the product. See Calibrate the product on page 313. 1. Release one spring (callout 1), and then disconnect one FFC (callout 2). CAUTION: The spring is not captive. Do not lose the
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 224
    3. Remove five screws (callout 1), and then remove the cover (callout 2). CAUTION: Be careful. The PGC actuators are easily dislodged when the cover is removed. See Figure 2-185 Reinstall the PGC actuators (1 of 5) on page 193. To reinstall the actuators, see Reinstall the protective glass cleaner (
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 225
    5. Rotate the corner of the assembly away from the product until you can see the PCA, and then remove the assembly from the product. Reinstallation tip When the laser/scanner is correctly positioned in the chassis, the plastic parts which protrude at the front and rear of the product will be firmly
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 226
    2. Remove the actuator and spring from the product. Install the spring on the actuator. Figure 2-186 Reinstall the PGC actuators (2 of 5) 3. Before proceeding, take note of the following: ● Callout 1: The pin on the actuator will be installed into the slot in the chassis. ● Callout 2: The pin on
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 227
    4. Place the end of the actuator into the PGC rod, and then use a small flat blade screw driver to fasten the end of the spring on the tab on the chassis. Figure 2-188 Reinstall the PGC actuators (4 of 5) 5. Push down on the actuator
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 228
    High-voltage power supply upper (HVPS-T) Before proceeding, remove the following components: ● Formatter. See Formatter PCA on page 78. ● Upper-left cover. See Upper-left cover on page 96. ● Power-supply cover. See Power-supply cover on page 98. ● Left cover. See Left cover on page 99. ● Front-top
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 229
    2. Remove three screws (callout 1), release four tabs (callout 2), and then remove the power supply. Figure 2-191 Remove the high-voltage power supply upper (2 of 2) 1 2 ENWW Internal assemblies 197
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 230
    Reinstall the high-voltage power supply upper When you reinstall the power supply, look through the holes in the PCA and make sure that the highvoltage contact springs are correctly seated against the PCA. NOTE: For a replacement power supply, remove one wire harness (callout 1) and then install it
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 231
    Yellow, magenta, cyan, and black drum motors Before proceeding, remove the following components: ● Upper-left cover. See Upper-left cover on page 96. ● Power-supply cover. See Power-supply cover on page 98. ● Left cover. See Left cover on page 99. ● Front-top cover. See Front-top cover on page 100.
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 232
    Fuser motor Before proceeding, remove the following components: ● Formatter. See Formatter PCA on page 78. ● Upper-left cover. See Upper-left cover on page 96. ● Power-supply cover. See Power-supply cover on page 98. ● Left cover. See Left cover on page 99. ● Front-top cover. See Front-top cover on
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 233
    Remove the fuser motor Remove three screws (callout 1), disconnect one connector (callout 2), and then remove the motor (callout 3). Figure 2-194 Remove the fuser motor 1 2 3 ENWW Internal assemblies 201
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 234
    ITB motor Before proceeding, remove the following components: ● Upper-left cover. See Upper-left cover on page 96. ● Power-supply cover. See Power-supply cover on page 98. ● Front-top cover. See Front-top cover on page 100. ● Rear-top cover. See Rear-top cover on page 102. ● Left cover. See Left
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 235
    Main-drive assembly NOTE: Removing the main-drive assembly typically requires more than 2 hours to complete. Before proceeding, remove the following components: ● Formatter. See Formatter PCA on page 78. ● Intermediate transfer belt (ITB). See Intermediate transfer belt (ITB) on page 92. ● Upper-
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 236
    Remove the main-drive assembly 1. Remove eight connectors (callout 1), and then release the wire harnesses from the guides (callout 2). NOTE: Leave the wire harnesses with the product. Figure 2-196 Remove the main-drive assembly (1 of 6) 1 2 2. Remove two screws (callout 1), disconnect one connector
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 237
    the main-drive assembly (callout 2). NOTE: Leave the wire harnesses connected to the wire guide and attached to the product for easier reinstallation. Figure 2-198 Remove the main-drive assembly (3 of 6) 1 2 4. Remove 10 screws. Figure 2-199 Remove the main-drive
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 238
    Separate the main-drive assembly from the product. Figure 2-200 Remove the main-drive assembly (5 of 6) 6. Release the wire harness (callout 1) from the guides, and then remove the main-drive assembly from the product. Reinstallation tip It might be easier to pass this harness over the edge of the
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 239
    Reinstall the main-drive assembly 1. Locate the cams (callout 1) on the back side of the assembly. Figure 2-202 Reinstall the main-drive assembly (1 of 7) 1 2. Slowly rotate the shaft near the black cam. WARNING! Do not touch the plastic gears or cams. You must not wipe away any of the grease that
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 240
    3. Continue to rotate the shaft until the holes in the black-cam gear align as shown below. When correctly aligned, the bottom-most hole in the gear is aligned with a hole in the sheet-metal chassis. NOTE: The holes in the other cam gears have a different alignment. You must make sure that the holes
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 241
    4. Verify that the cams (callout 1) align correctly. TIP: The second cam in from the right (the white cam to the left of the black cam), should have the second hole aligned with the hole in the sheet-metal chassis. The third cam in from the right, should have the third hole aligned with the hole in
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 242
    . Figure 2-208 Reinstall the main-drive assembly (7 of 7) TIP: After reassembling the product, use the DIAGNOSTICS menu to print a COLOR BAND TEST page. If the test page shows one or more color planes are not printing (usually in the upper left corner of the page), the cam or cams for the missing
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 243
    Fuser-drive assembly NOTE: Removing the fuser-drive assembly typically requires more than 2 hours to complete. Before proceeding, remove the following components: ● Formatter. See Formatter PCA on page 78. ● Fuser. See Fuser on page 85. ● Upper-left cover. See Upper-left cover on page 96. ● Power-
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 244
    1. Remove one screw (callout 1), and then remove the cover (callout 2). Figure 2-209 Remove the fuser-drive assembly (1 of 7) 2 1 2. Release the wire harness (callout 1) from the guides. Figure 2-210 Remove the fuser-drive assembly (2 of 7) 1 212 Chapter 2 Removal and replacement ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 245
    3. Remove two screws (callout 1), one static wire (callout 2), and one switch (callout 3). Figure 2-211 Remove the fuser-drive assembly (3 of 7) 1 3 2 4. Release one tab, and then slide the wire harness holder (callout 1) to release it from the fuser-drive assembly. NOTE: Releasing the wire harness
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 246
    5. Disconnect two connectors. Figure 2-213 Remove the fuser-drive assembly (5 of 7) 6. Remove three screws. Figure 2-214 Remove the fuser-drive assembly (6 of 7) 214 Chapter 2 Removal and replacement ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 247
    7. Carefully remove the assembly. Figure 2-215 Remove the fuser-drive assembly (7 of 7) Reinstall the fuser-drive assembly Rotate the motor until the gears align, and the assembly is flat against the chassis. Figure 2-216 Reinstall the fuser-drive assembly ENWW Internal assemblies 215
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 248
    ) on page 220 The following procedures apply to both the 1 x 500-sheet optional paper feeder and the 3 x 500-sheet optional paper unless specifically noted. Front door (optional paper feeder) 1. Release one tab (callout 1), and then remove the stopper (callout 2). Figure 2-217 Remove the front door
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 249
    2. Release the link arm (callout 1), and then remove the front door (callout 2). Figure 2-218 Remove the front door (optional paper feeder) (2 of 2) 1 2 ENWW Optional paper feeder assemblies (1 x 500-sheet and 3 x 500-sheet) 217
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 250
    Rear cover (optional paper feeder) ▲ Remove two screws (callout 1), and then remove the rear cover (callout 2). Figure 2-219 Remove the rear cover (optional paper feeder) 1 2 218 Chapter 2 Removal and replacement ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 251
    Right-front cover (optional paper feeder) ▲ Open the front and right doors, remove one screw (callout 1), and then lift the right-front cover (callout 2) to remove. Figure 2-220 Remove the right-front cover (optional paper feeder) 1 2 ENWW Optional paper feeder assemblies (1 x 500-sheet and 3 x
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 252
    Right door (optional paper feeder) 1. Open the right door, release one tab (callout 1), and then remove the stopper (callout 2) Figure 2-221 Remove the right door (optional paper feeder) (1 of 3) 1 2 2. Close the right door slightly, and then release the upper link arm. Figure 2-222 Remove the right
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 253
    3. Slide the door to release the lower link arm, and then remove the right door. Figure 2-223 Remove the right door (optional paper feeder) (3 of 3) ENWW Optional paper feeder assemblies (1 x 500-sheet and 3 x 500-sheet) 221
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 254
    Left cover (optional paper feeder) Before proceeding, remove the following components: ● Front door (optional paper feeder). See Front door (optional paper feeder) on page 216. ● Right-front cover (optional paper feeder). See Right-front cover (optional paper feeder) on page 219. Remove the left
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 255
    2. 1 x 500 paper feeder only: Remove three screws (callout 1), and then remove the storage box (callout 2). Figure 2-225 Remove the left cover (optional paper feeder) (2 of 3) 1 2 3. Release five tabs (callout 1), and then remove the left cover (callout 2). Figure 2-226 Remove the left cover (
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 256
    Right cover (optional paper feeder) Before proceeding, remove the following components: ● Right door (optional paper feeder). See Right door (optional paper feeder) on page 220. Remove the right cover (optional paper feeder) ▲ Remove two screws (callout 1), release one tab (callout 2), and then
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 257
    Rear-right cover (optional paper feeder) Before proceeding, remove the following components: ● Right door (optional paper feeder). See Right door (optional paper feeder) on page 220. Remove the rear-right cover (optional paper feeder) ▲ Remove one screw (callout 1), and then lift the rear-right
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 258
    Pickup assembly (optional paper feeder) Before proceeding, remove the following components: ● Paper feeder right front cover. See Right-front cover (optional paper feeder) on page 219. ● Paper feeder rear cover. See Rear cover (optional paper feeder) on page 218. NOTE: The following procedure shows
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 259
    2. 1 x 500-sheet optional paper feeder only: Remove three screws (callout 1), disconnect one connector (callout 2), and then remove the motor assembly (callout 3). Figure 2-230 Remove the pickup assembly (optional paper feeder) (2 of 5) 2 3 1 3. 3 x 500-sheet optional paper feeder only: Remove four
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 260
    4. Remove one screw (callout 1), and then disconnect three connectors (callout 2). Figure 2-232 Remove the pickup assembly (optional paper feeder) (4 of 5) 2 1 5. Remove one screw (callout 1), and then remove the pickup assembly (callout 2). Figure 2-233 Remove the pickup assembly (optional paper
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 261
    Lifter assembly (optional paper feeder) Before proceeding, remove the following components: ● Rear cover (optional paper feeder). See Rear cover (optional paper feeder) on page 218. Remove the lifter assembly (optional paper feeder) 1. Disconnect one connector (callout 1). Figure 2-234 Remove the
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 262
    the lifter-drive assembly (optional paper feeder) 1. Disconnect one connector (callout 1), and then release the wire harnesses (callout 3) from the guides (callout 2). Figure 2-236 Remove the lifter-drive assembly (optional paper feeder) (1 of 2) 1 2 3 2. Remove two screws (callout 1), and then
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 263
    Pickup motor assembly (optional paper feeder) Before proceeding, remove the following components: ● Rear cover (optional paper feeder). See Rear cover (optional paper feeder) on page 218. Remove the pickup motor (optional paper feeder) assembly 1. 1 x 500-sheet optional paper feeder only: Remove
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 264
    Controller PCA (optional paper feeder) Before proceeding, remove the following components: ● Rear cover (optional paper feeder). See Rear cover (optional paper feeder) on page 218. Remove the controller PCA (optional paper feeder) 1. 1 x 500-sheet optional paper feeder only: Disconnect four
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 265
    checklist ● Menu map ● Troubleshooting process ● Tools for troubleshooting ● Clear paper jams ● Solve paper-handling problems ● Use manual print modes ● Solve image-quality problems ● Clean the product ● Solve performance problems ● Solve connectivity problems ● Service mode functions ● Product
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 266
    paused, or set to print offline. Windows: Click Start, click Settings, and then click Printers or Printers and Faxes. Double-click HP Color LaserJet CP4525. -or- Mac OS X: Open Printer Setup Utility, and then double-click the line for the HP Color LaserJet CP4525. 234 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 267
    Color LaserJet Enterprise CP4020-CP4520 Series printer driver. Check the program to make sure that you are using the HP Color LaserJet Enterprise CP4020-CP4520 Series printer driver. 9. Print a short document from a different program that has worked in the past. If this solution works, the problem
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 268
    MENU MAP submenu, and then press the OK button to print the menu structure. 4. Press the back arrow to exit the menus. 236 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 269
    problem and to reduce the number of steps that are required to fix the problem. ● Use the troubleshooting flowchart to pinpoint the root cause of hardware malfunctions. The flowchart guides in chapter 1 of this manual? ● Is the product exposed Does the customer use only supported media? ● Is the media
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 270
    troubleshooting checklist (continued) Input trays Print cartridges ITB and fuser Covers Condensation Miscellaneous ● Is the amount of media in the tray within specifications? ● Is the media correctly placed in the tray? ● Are the paper guides any non-HP components ( troubleshooting. ● For
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 271
    follow to quickly isolate and solve product hardware problems. Each row depicts a major troubleshooting step. A "yes" answer to a follow the instructions there. After completing the instructions, go to the next major step in this troubleshooting flowchart. Table 3-2 Troubleshooting flowchart 1
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 272
    the information in this section to isolate and solve the problem. Power-on troubleshooting overview Turn on the product power. If the control panel formatter, and then verify that the heartbeat LED is flashing. 6. Remove any HP Jetdirect or other EIO cards, and then try to turn the product on again
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 273
    ● 00:36 seconds; HP logo appears on the control-panel display ● 00:60 seconds; engine noises stop (you can run engine test at this point) ● 00:83 seconds; Initializing continues ● 00:85 fans rotate at slow speed ● 00:90 seconds; product enters the Ready state ENWW Troubleshooting process 241
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 274
    , and individual diagnostics can identify and troubleshoot product problems. Understand lights on the formatter Three failures, check all the network cable connections. In addition, you can try to manually configure the link settings on the embedded print server by using the product control-panel
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 275
    HP Color LaserJet Enterprise CP4020-CP4520 Series product. The product contains extensive internal diagnostics that help in troubleshooting position. WARNING! Be careful when performing printer diagnostics to avoid risk of injury. Only trained service personnel should open and run the diagnostics
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 276
    product. This test can be used isolate problems, such as noise, and to isolate print-quality problems that are related to individual print cartridges. NOTE: Color cartridges are not keyed and can be rear of the product. The test page should have a series of 244 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 277
    pages that you can use to isolate the cause of jams. To isolate a problem, specify which input tray to use, specify whether to use the duplex path, and specify the number of copies to print. Multiple copies can be -path test options for the test you want to run. ENWW Tools for troubleshooting 245
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 278
    button. 3. Press the down arrow to highlight the MANUAL SENSOR TEST option, and then press the OK button. C loop 2 sensor D fuser delivery sensor E duplex re-pickup sensor F output bin full sensor G I J K L M N Bit 1 1 1 1 0 0 0 0 0 1 0 0 0 246 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 279
    the control-panel display for sensor response. 4. If there is no response, replace the registration assembly. See Registration assembly on page 128. ENWW Tools for troubleshooting 247
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 280
    loop sensors 4. Check the control-panel display for a sensor response. 5. If there is no response, replace fuser. See Fuser on page 85. 248 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 281
    fuser delivery sensor (2 of 2) 5. Check the control-panel display for a sensor response. 6. If there is no response, replace the fuser delivery sensor. ENWW Tools for troubleshooting 249
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 282
    pickup sensor 1. Open the right door. 2. Lift the secondary-transfer assembly. 3. Press the flag to activate the sensor. Figure 3-9 Test the duplex re-pickup sensor 4. Check the control-panel display for sensor response. 5. If there is no response, replace the registration assembly. See Registration
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 283
    is moving. If not, replace the delivery assembly. See Delivery assembly on page 145. If the sensor is malfunctioning, replace the sensor. ENWW Tools for troubleshooting 251
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 284
    inside the main-drive assembly and cannot be accessed for direct manual testing. To test this sensor, do the following. 1. Access the manual-sensor test menu and select sensor test I. 2. Locate connector from "0" to "1" if the sensor is properly functioning. 252 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 285
    fuser pressure-release sensor 5. Check the control-panel display for sensor response. 6. If there is no response, replace fuser pressure-release sensor. ENWW Tools for troubleshooting 253
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 286
    the ITB. Figure 3-12 Test the primary transfer-roller-disengagement sensor (1 of 4) 1 Figure 3-13 Test the primary transfer-roller-disengagement sensor (2 of 4) 2 254 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 287
    the flag is moving. Figure 3-15 Test the primary transfer-roller-disengagement sensor (4 of 4) 7. If the flag moves correctly, replace the sensor. ENWW Tools for troubleshooting 255
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 288
    L media sensor 1. You cannot test this sensor with a manual sensor test. Test using the paper-path sensors test. See Paper- displays if the media type is Soft gloss ● 1; displays if the media type is HP multipurpose paper ● D; displays if the media type is Premium Choice 32lb 256 Chapter 3 Solve
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 289
    , and then check the control panel on the product for sensor response. TIP: You can leave the front door open and use a slender blade screw driver or pencil to activate the switch. 3. If there is no response, replace the front-door switch. ENWW Tools for
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 290
    flag, and check the control panel on the product for sensor response. 3. If there is no response, replace the right-door switch. 258 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 291
    feeder) d Tray 5 paper size switches SW4 (paper feeder) The following items cannot be tested using the manual sensor test. 5 V laser and 24 V interlock switches SW1 and SW2 Power switch SW3 New ITB sensor 1. It can take a few seconds for bits to toggle. ENWW Tools for troubleshooting 259
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 292
    Table 3-6 Default state of bits Label O P Q R S T U V W X Y Z a b c d Bit 11 111 0 11 101 11 0 11 ● Test each switch individually. 260 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 293
    O Tray 1 paper present sensor 1. Open Tray 1. 2. Toggle the Tray 1 paper-present sensor flag. Figure 3-19 Test the Tray 1 media-present sensor 3. Check the control-panel display for sensor response. 4. If there is no response, replace Tray 1. ENWW Tools for troubleshooting 261
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 294
    -panel display for sensor response. 4. If there is no response, replace the cassette-pickup assembly. See Tray-pickup assembly on page 180. 262 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 295
    -panel display for sensor response. 4. If there is no response, replace the cassette-pickup assembly. See Tray-pickup assembly on page 180. ENWW Tools for troubleshooting 263
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 296
    control-panel display for sensor response. 3. If there is no response, replace the lifter assembly. See Lifter base assembly on page 175. 264 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 297
    sensor See T Tray 3 feed sensor on page 265. Y Tray 4 paper surface 1 and 2 sensors See Q Tray 2 paper surface 1 and 2 sensors on page 263. ENWW Tools for troubleshooting 265
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 298
    2 sensors See Q Tray 2 paper surface 1 and 2 sensors on page 263. d Tray 5 paper size switches See R Tray 2 paper size switches on page 264. 266 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 299
    doors (and access ports in the covers; callout 2) that actuate the front- and right-door interlock switch (behind the right-front cover). 2 1 2 1 ENWW Tools for troubleshooting 267
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 300
    index card, into a 10 mm (.375 in) strip, and then wedge the strip into the opening at the front of the product. 268 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 301
    index card, into a 10 mm (.375 in) strip, and then insert the strip into the opening at the right of the product. ENWW Tools for troubleshooting 269
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 302
    ● Right-door logic switch ◦ Use masking tape to keep the switch flag depressed. TIP: You might have to use two pieces of tape to overcome the tension return spring on the flag. 270 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 303
    the hole just below the handle (callout 2) and then rotate the ITB alienation gear (callout 3). Figure 3-25 Test the new ITB sensor 2 3 1 ENWW Tools for troubleshooting 271
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 304
    Tray 3, 4, and 5 right door switch NOTE: There is no manual sensor test for this sensor. 1. Open the paper feeder right door. Check the control-panel display for the CLOSE the door flag (callout 1) is not damaged or missing. Figure 3-26 Test the right door switch 1 272 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 305
    SR14 C loop 2 sensor SR15 D fuser delivery sensor SR5 E duplex re-pick up sensor SR22 F output bin full sensor SR6 G HP Multi-purpose paper; a "D" displays for HP Premium Choice 32lb paper. Print/stop test Use this diagnostic test to isolate the cause of problems troubleshooting 273
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 306
    during testing, activate the door switch. Component tests Component test (special-mode test) This test activates individual parts independently to isolate problems. Each component test can be performed once or repeatedly. If you select CONTINUOUS from the dropdown menu as the repeat option, the
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 307
    M11: Duplex reverse motor Comments Activates the yellow/magenta scanner motor for 10 seconds. Activate the fuser motor at a specified speed for 10 seconds. Reverses the fuser motor and pressurizes or depressurizes the fuser. Activates CMYK developer alienation in the following sequence: All colors
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 308
    REPEAT Comments Activates the duplex flapper solenoid for 10 seconds causing the switch-back diverter to move. Allows you to specify the number of times the product sequences. The choices are ONCE (default) and CONTINUOUS. To terminate the test, press STOP 276 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 309
    10 11 21 20 Description ITB Primary transfer roller Duplex flapper (duplex model) Duplex reverse roller (duplex model) Pressure roller Fuser Fuser sleeve Duplex feed roller (duplex model) Secondary transfer roller ITB drive roller RD sensor /scanner assembly ENWW Tools for troubleshooting 277
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 310
    Figure 3-28 Optional paper feeder (1 x 500-sheet) 1 2 5 4 3 Item 1 2 3 4 5 Description Pickup roller Feed roller Separation roller Storage space Cassette 278 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 311
    Figure 3-29 Optional paper feeder (3 x 500-sheet) 1 2 4 3 Item 1 2 3 4 Description Pickup roller Feed roller Separation roller Cassette ENWW Tools for troubleshooting 279
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 312
    a cable-type security lock Figure 3-30 Formatter PCA 4 1 2 3 Table 3-9 Formatter PCA Item Description 1 DIMM slot 2 Internal hard drive 3 USB ports 4 EIO slot 280 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 313
    TOP (top of page) sensor (SR20), duplex re-pickup sensor (SR22), and duplex repickup clutch (CL1) (HP Color LaserJet CP4525dn, HP Color LaserJet CP4025dn, and HP Color LaserJet CP4525xh only) J102: not used J116: HVPS M5) and black J150: LVPS drum position (M6) ENWW Tools for troubleshooting 281
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 314
    (SR2), cyan drum home-position sensor (SR3), black drum home-position sensor (SR4), and primary transfer roller disengagement solenoid (SL1) J162: fuser 282 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 315
    J405: lifter motor 2 signal J406: cassette media presence 2 J407: lifter motor 1 signal J408: cassette media presence 1 J409: pickup motor J410: communication (command) ENWW Tools for troubleshooting 283
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 316
    Left cover 5 6 7 Item 7 8 9 10 11 12 Description Power-supply cover Rear cover Tray 2 Front-door assembly Control-panel assembly Front-top cover 284 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 317
    Figure 3-34 Major component locations (1 of 3) 1 6 5 2 4 3 Item 1 2 3 4 5 6 Description Main drive assembly Fuser Registration assembly Toner collection unit Laser/scanner assembly (C/Bk) Laser/scanner assembly (Y/M) ENWW Tools for troubleshooting 285
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 318
    of 3) 9 1 8 7 2 6 Item 1 2 3 4 5 Description Duplex-drive assembly MP tray assembly Delivery assembly RD sensor assembly Tray-pickup assembly 3 4 5 Item 6 7 8 9 Description Delivery fan Cartridge fan Residual toner full sensor Residual-toner-feed motor 286 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 319
    Figure 3-36 Major component locations (3 of 3) 1 6 5 2 4 Item 1 2 3 4 5 6 Description Fuser-drive assembly Tray-pickup drive assembly Secondary transfer assembly ITB Lifter-drive assembly Lifter base assembly ENWW 3 Tools for troubleshooting 287
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 320
    motor 3 Tray 1 separation pad 4 Yellow drum motor 5 Magenta drum motor 6 Cyan drum motor 7 ITB motor 8 Power supply fan 288 Chapter 3 Solve problems 4 5 6 7 8 9 10 Item Description 9 Tray 2 feed roller 10 Tray 2 separation roller 11 Tray 2 pickup roller 12 Secondary transfer roller 13 Black
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 321
    PCA Low-voltage power supply Item 4 5 6 Description High-voltage power supply upper (HVPS-T) High-voltage power supply lower (HVPS-D) Environment sensor PCA ENWW Tools for troubleshooting 289
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 322
    Figure 3-39 Optional paper feeder (1 x 500-sheet) component locations (1 of 2) 1 8 2 7 3 6 5 4 Item 1 2 3 4 Description Rear-right cover Right door Right cover Left cover Item 5 6 7 8 Description Rear cover Right front cover Front door Tray 3 290 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 323
    Figure 3-40 Optional paper feeder (1 x 500-sheet) component locations (2 of 2) 5 1 2 4 3 Item 1 2 3 Description Lifter-drive assembly Pickup motor Pickup assembly Item 4 5 Description Controller PCA Lifter base assembly ENWW Tools for troubleshooting 291
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 324
    Figure 3-41 Optional paper feeder (3 x 500-sheet) component locations (1 of 2) 1 7 2 3 6 5 4 Item 1 2 3 4 Description Rear right cover Right door Right cover Left cover Item 5 6 7 Description Rear cover Right front cover Trays 3, 4, and 5 292 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 325
    2) 5 1 2 4 3 Item 1 2 3 Description Lifter-drive assembly (Trays 3, 4, and 5) Pickup motor Pickup assembly (Trays 3, 4, and 5) Item 4 5 Description Controller PCA Lifter base assembly (Trays 3, 4, and 5) ENWW Tools for troubleshooting 293
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 326
    ENWW 294 Chapter 3 Solve problems Operation 1 Cassette pickup solenoid 2 TOP sensor 3 Fixing delivery sensor 4 Fixing motor 5 Scanner motor 6 TOP signal 7 Y drum motor 8 M drum motor 9 C drum motor 10 K drum motor 11
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 327
    J511 J43 1 SGND RDOORSN S 21 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 J130 Laser Scanner Unit (C/Bk) J503 23 FM1 321 21 J147 ENWW Tools for troubleshooting 295
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 328
    6 5 4 3 2 1 NPLED PGND PGND J51D J64DH J64D PGND CHK24V 4321 J77L Registration Unit (Duplex model) J53D J53DH J53 L DRMKF R /DRM4ACC /DRM4DE C /DRM4FG +24VA +24VA J162 SGND 1 10 9 8 7 6 5 4 3 2 1 J131 12 11 10 9 8 7 6 5 4 3 2 1 J145 654321 J148 296 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 329
    Tools for troubleshooting 297 ENWW 1234 1234 J409 6 5 4 3 2 SR1 SR2 SR3 SR4 J11L 1 2 3 4 5 J11LH J11D 5 4 3 2 1 J12 3 2 1 J13L J13LH 123 J13D 3 2 1 SL1 SL 12 1 2 J18L J18LH 2 1 J18D 1 2 3 4 5 1 J10LB DCC I/F
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 330
    +3.3U GND T3_PSNS T3_PLVL_P T3_PLVL_A +3.3U GND T3_PATHS +24V T3_PICK_SL Figure 3-47 Paper feeder circuit diagram (3 X 500-sheet) 298 Chapter 3 Solve problems 6 5 4 3 2 SR1 SR2 SR3 1 2 3 4 5 J11L SR4 J12 3 2 1 J13LH J13L 123 SL1 SL 12 1 2 J18L J18LH J10LB DCC I/F B5 A4 J10LA J10L
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 331
    Printers Provides a list of all the HP products that support HP Easy Printer Care software. Find Other Printers window Add more products to the My HP Printers list Click the Find Other Printers end of life. After you correct a problem with the product, click the refresh button troubleshooting 299
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 332
    links to information about HP Easy Printer Care, to advanced product settings, and to product usage reports. Settings tab ● Troubleshooting and Help: Provides links to tools that you can use to resolve problems, to online product support information, and to online HP experts. ● About: Provides
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 333
    for specific print jobs. Color Access Control Use this feature to permit or restrict color printing. NOTE: This item is available only for HP color products that support Color Access Control. NOTE: This item is available from the Overview and Support tabs. ENWW Tools for troubleshooting 301
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 334
    returns to the Ready state after printing the print-quality-troubleshooting pages. Follow the instructions on the pages that print out. Figure 3-48 Print-quality troubleshooting procedure hp color LaserJet CP 4520 Printers Print Quality Troubleshooting Procedure 1 302 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 335
    Figure 3-49 Yellow print-quality troubleshooting page Yellow Green Figure 3-50 Yellow comparison page Green Yellow Yellow cannot be easily seen unless combined with cyan, so half of each page is yellow and the other half is an amplified version of yellow problems (green half). Compare the yellow
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 336
    printing, the box with no extra color in each area on each page shows how far off the CPR of that color is. Each page has two process quality troubleshooting, go to www.hp.com/support/ cljcp4025 or www.hp.com/support/cljcp4525 and select PQ Troubleshooting Tools. 304 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 337
    , and then press the OK button. 3. Press the down arrow to highlight PRINT DIAGNOSTICS PAGE, and then press the OK button to print the page. HP Color LaserJet CP 4520 Printers Diagnostics Page 1 24 Page 1 3 5 6 78 DD MMM YYYY XX:XX 1 Calibration information 2 Parameters
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 338
    arrow / to highlight the PROCESS CLEANING PAGE option, and then press the OK button. 6. Discard the printed page. The task is complete. 306 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 339
    information about those devices. Figure 3-52 Configuration page HP Color LaserJet CP 4520 Printers Configuration Page 1 4 Page 1 5 2 6 3 7 8 ENGLISH 1 Printer information 2 Installed personalities and options 3 Color density 4 Calibration information ENWW Tools for troubleshooting 307
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 340
    5 Memory 6 Event log 7 Security 8 Paper trays and options 308 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 341
    HP embedded Jetdirect page HP Color LaserJet CP 4520 Printers Embedded Jetdirect Page 1 4 Page 1 2 5 3 6 1 HP Jetdirect Configuration indicates the product status, model the status line under the HP Jetdirect configuration lines indicates "I/O Card Ready". ENWW Tools for troubleshooting 309
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 342
    Embedded protocol page The embedded protocol page contains the following information: Figure 3-54 Embedded protocol page HP Color LaserJet CP 3525 Printers Embedded Protocol Page Page 1 1 3 4 2 1 IPX/SPX 2 Novell/NetWare 3 AppleTalk 4 DLC/LLC 310 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 343
    servicing the product. This information is on the various configuration pages. Table 3-12 Important information on the configuration pages Type of information Specific HP HP Duplex unit Look on the main configuration page, under "Installed Personalities and Options." Shows model highlight COLOR BAND
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 344
    Print-quality troubleshooting tools Repetitive defects ruler If defects repeat at regular intervals 55 mm 63 mm 76 mm 76 mm 80 mm 96 mm 101 mm 312 Chapter 3 Solve problems Product components that cause the defect Print cartridge Print cartridge Transfer unit Print cartridge Transfer roller Print
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 345
    quality problems, manually after a laser scanner is replaced. ● QUICK CALIBRATE NOW: takes approximately 1 minute and performs Dmax and Dhalf calibrations. Use QUICK CALIBRATE NOW if colors are wrong, highlights are missing, or if colors are too dark or too light. ENWW Tools for troubleshooting
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 346
    panel. Use the control panel to access features not supported by the printer driver or software application, and to configure trays for paper size instructions for loading 4 x 6 media. Provides instructions for printing on both sides of the paper (duplex printing). Provides a list of the supported
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 347
    message appears if a user has two or more driver are multiplied by the number of copies specified on the control panel. For example, if you specified two copies in the driver and specify two copies on the control panel, a total of four copies of the job are printed. ENWW Tools for troubleshooting
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 348
    PRINT AND DELETE ● COPIES DELETE 316 Chapter 3 Solve problems Description This message appears if a user has two or more stored jobs that do not require Select the JOB option to print the number of copies specified in the driver. ● Select the CUSTOM VALUE option to specify the number of copies of
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 349
    Tray 1 to First mode or Cassette mode. On HP Color LaserJet Enterprise CP4020-CP4520 Series printers, setting Tray 1 to ANY SIZE and ANY TYPE is equivalent to First mode. Setting Tray 1 to a setting other than ANY SIZE or ANY TYPE is equivalent to Cassette mode. ENWW Tools for troubleshooting 317
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 350
    Description Allows you to configure the paper size for Tray 1. The default is ANY SIZE. See the product user guide for a complete list of available sizes. Allows you to configure the paper type for Tray 1. The default that the supply needs to be replaced. 318 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 351
    an alert message, but it continues printing. PRINT IN BLACK: The product prints in black when a color cartridge is near the end of its estimated life. STOP: The product stops until you replace the toner leakage, especially when replacing the Toner collection unit. Tools for troubleshooting 319
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 352
    Menu item USER DEFINED LOW SUPPLY MESSAGES Sub-menu item YELLOW CARTRIDGE MAGENTA CARTRIDGE CYAN CARTRIDGE BLACK CARTRIDGE TRANSFER KIT FUSER KIT LOW the control panel. LEVEL GAUGE: Determines whether or not a supply level gauge appears on the control panel. 320 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 353
    only in monochrome. ENABLE COLOR: All color pages sent to the product print in color. COLOR IF ALLOWED: A permissions database is referenced to verify if color pages are printed in color or monochrome. These menu -default values. Some menu items have no default. ENWW Tools for troubleshooting 321
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 354
    to ON makes MANUAL FEED the default for jobs that do not select a tray. The Autoselect option in the printer driver overrides this option. Allows you to select a version of the Courier font. The DARK setting is an internal Courier font available on HP LaserJet Series III printers and older. Allows
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 355
    number that maps to the various available trays and feeders. ● The STANDARD numbering is based on newer HP LaserJet printers with updated changes to the numbering of trays and feeders. ● The CLASSIC numbering is based on HP LaserJet 4 printers and earlier models. ENWW Tools for troubleshooting 323
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 356
    have no default. Item ADJUST COLOR SET REGISTRATION Sub-item Sub-item DENSITY ● BLACK DENSITY RESTORE COLOR VALUES ADJUST TRAY PRINT the color settings by resetting the density values of each color. For instructions for setting the registration of the image location. 324 Chapter 3 Solve
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 357
    a tray. When TRANSPARENCY ONLY is selected, the product senses only the first page. The product can distinguish transparencies from other paper types. ENWW Tools for troubleshooting 325
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 358
    . The default value is Image REt 3600. Try the 1200x1200 dpi setting to improve printing for detailed line work or small text. 326 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 359
    : adaptive halftoning and trapping. Adaptive halftoning increases edge sharpness. Trapping reduces the effect of color-plane misregistration by overlapping the edges of adjacent objects slightly. ● OFF turns off both when the AUTO CLEANING option is set to ON. ENWW Tools for troubleshooting 327
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 360
    PAGE Sub-item Values Description Prints a page of instructions for cleaning excess toner off the pressure roller in the fuser. NOTE: This option is available only for the HP Color LaserJet CP4025n printer and the HP Color LaserJet CP4525n printer. Allows you to create and process a cleaning page
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 361
    with the Ready message. Use this menu to control how the product handles paper trays and related prompts at the control panel. ENWW Tools for troubleshooting 329
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 362
    before printing a manual-feed job. ● UNLESS LOADED: A message appears only if the multipurpose tray is empty or does not match the size or type of the job. This option affects how paper is handled when printing from an Adobe PS print driver. ● ENABLED uses HP's paperhandling model. ● DISABLED uses
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 363
    of the page. NOTE: This option is available only for models that have automatic duplexing. This option controls how the product handles two-sided jobs (duplexing). Two options are available: ● AUTO: Enables Smart Duplexing, which instructs the product not to process both sides if the second side
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 364
    . ● JOB: The warning message disappears at the end of the job. ● ON: The warning message remains until you press the OK button. 332 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 365
    OFF: Stops the product from printing until the error is cleared by the user. Sets whether the product will attempt to reprint pages after a jam. If This is only available if there is no hard disk installed and the printer has at least 8 MB of memory. If the AUTO setting is for troubleshooting 333
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 366
    HP Web Jetadmin or the embedded Web server. For more information on these options, see the product user guide that contains the current security settings on the HP Jetdirect print server. NO: A security settings product. This name is listed on the HP Jetdirect configuration page. The default host name
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 367
    MANUAL MANUAL SETTINGS IP ADDRESS SUBNET MASK DEFAULT GATEWAY DEFAULT IP AUTO IP* LEGACY DHCP RELEASE NO* YES Description Specifies the method that TCP/IPv4 parameters will be configured on the HP example, when manually configured to , consistent with older HP Jetdirect products. This
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 368
    RENEW Sub-item NO* YES PRIMARY DNS SECONDARY DNS IPV6 SETTINGS ENABLE ON OFF* ADDRESS MANUAL SETTINGS ● ENABLE ● ADDRESS DHCPV6 POLICY ROUTER SPECIFIED ROUTER UNAVAILABLE* ALWAYS PRIMARY DNS SECONDARY secondary DNS server that the print server should use. 336 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 369
    networks, you might need to contact your Internet Service Provider (ISP) for the proxy server address. Type the port number used by the proxy server for client support. The port number identifies the port reserved for using either HTTP or HTTPS is permitted. ENWW Tools for troubleshooting 337
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 370
    factory defaults. NO: The current security settings are maintained. This menu provides tests to help diagnose network hardware or TCP/IP network connection problems. Embedded tests help to identify whether a network fault is internal or external to the product. Use an embedded test to check hardware
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 371
    this test, or NO to not choose it. This test helps to identify data path and corruption problems on an HP postscript level 3 emulation product. It sends a predefined PS file to the product, However, the test 4. To configure the test to run continuously, select 0. ENWW Tools for troubleshooting 339
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 372
    0. Shows whether a ping test is in progress. YES indicates a test in progress, and NO indicates that a test completed or was not run. 340 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 373
    out or you manually return to the main duplex operation. 100TX HALF: 100 Mbps, half-duplex operation. 100TX FULL: 100 Mbps, full-duplex operation. 100TX AUTO: Limits auto-negotiation to a maximum link speed of 100 Mbps. 1000T FULL: 1000 Mbps, full-duplex operation. ENWW Tools for troubleshooting
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 374
    any item when the user enters the menu item SLEEP DELAY SHOW EVENT LOG PQ TROUBLESHOOTING PRINT DIAGNOSTICS PAGE instructions, pages for each color, a demo page, and a configuration page. These pages can help isolate print-quality problems. Prints a page that can assist in diagnosing product problems
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 375
    specific tray. TRAY 3 TRAY 4 TRAY 5 OFF ON Determines whether the duplexer is included in the test. NOTE: This option is available only for models that have an automatic duplexer need to be manually cleared. A service representative should perform this test. ENWW Tools for troubleshooting 343
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 376
    . Service menu The SERVICE menu is locked and requires a PIN for access. This menu is intended for use by authorized service personnel. See Service mode functions on page 420. Product PINs ● HP Color LaserJet CP4025: 11402509 ● HP Color LaserJet CP4525: 11452509 344 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 377
    can indicate the status of or problems with the product. Message type setting. If a critical error persists, service is required. Control-panel messages Table 3- you believe you purchased a genuine HP supply, go to www.hp.com/go/ anticounterfeit. 10.XX. Yellow ENWW Tools for troubleshooting 345
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 378
    4, or 5) on page 393. 13.XX.YY JAM IN RIGHT DOOR A jam has occurred in the duplex and feed For instructions on clearing the jam, see area inside the right door. Clear jams in the right door on page 387. (Some data might be lost.) Check the host configuration. 346 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 379
    To continue press OK Too much data was sent to the embedded HP Jetdirect print server. Press the OK button to print the transferred data registration assembly. 41.7 ERROR To continue press OK 48.01 TRANSFER UNIT ERROR Printer error ● X = 2; beam detected misprint ● X = 7; media transport error
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 380
    jobs, software applications issues, nonproduct specific printer drivers, poor-quality USB or network cables printer driver, a problem with the software application, or a problem with the file you are printing. ◦ Upgrading the product firmware might help resolve the error. See the product user guide
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 381
    connector J50 between the fuser and the product. If either is damaged, replace the connector or fuser. See Fuser on page 85. ENWW Tools for troubleshooting 349
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 382
    ● 52.00 ERROR: If the laser/scanner assembly (Y/M) does not start up, reconnect connector J71 on the laser driver PCA and connector J112 on the DC controller PCA. If the laser/scanner assembly (C/Bk) does not start up, PCA. See DC controller PCA only on page 155. 350 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 383
    the DC controller PCA. If the message persists, replace the low-voltage power supply. See Lowvoltage power supply (LVPS) on page 157. ENWW Tools for troubleshooting 351
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 384
    DIAGNOSTICS menu. If the message persists, replace the magenta drum motor. See Yellow, magenta, cyan, and black drum motors on page 199. 352 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 385
    the disengagement mechanism is functioning properly. If it is not, replace the developing disengagement motor. See Developing-disengagement motor on page 168. ENWW Tools for troubleshooting 353
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 386
    deck controller PCA. 4. If the message persists, replace the lifter drive assembly. See Lifter-drive assembly (optional paper feeder) on page 230. 354 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 387
    Lifter-drive assembly (optional paper feeder) on page 230. 62 NO SYSTEM The product has an internal problem. Turn the product off and then on. To continue turn off then on 68.X PERMANENT STORAGE on. X values ● 0 = Internal memory ● 1 = Removable disk ENWW Tools for troubleshooting 355
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 388
    embedded HP Jetdirect card has failed. Download the correct firmware upgrade file for this product, and then reinstall the upgrade. See the product user guide Duplex registration is not available when the Configure the tray to a specific problem persist, replace the connector for tray. 356
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 389
    Signature Upgrade cancelled The firmware upgrade code does not match the product signature. Download the correct firmware upgrade file for this product, and then reinstall the upgrade. See the product user guide for more information. BLACK CARTRIDGE LOW The product indicates when a supply level
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 390
    be initialized before use. Use the embedded Web server or HP Web Jetadmin to initialize the component. CHECKING PAPER PATH The will be cleared from memory. Print the job by using a printer driver for a different printer language, or add the requested language to the product (if problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 391
    so it is available when the installed cartridge has reached the end of its estimated life. See Print cartridges on page 74. ENWW Tools for troubleshooting 359
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 392
    print cartridge at this time unless print quality is no longer acceptable. After an HP supply has reached the very low threshold, the HP premium protection warranty for that supply has ended. Press the OK button to continue system because the file system was full. 360 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 393
    kit. Instructions are included with the fuser kit. Genuine HP supplies HP. HP SECURE DRIVE DISABLED The drive has been encrypted for another product. Remove the drive or see the embedded Web server for more information. INCOMPATIBLE CARTRIDGE The indicated color troubleshooting 361
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 394
    action is necessary. INSTALL CARTRIDGE The print cartridge second time for more information about the specific supply. Insert the supply item or make error persists, use the manual sensor test to check the ITB alienation sensor (SR9). See Manual sensor test (special-mode test problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 395
    the size and type of paper loaded. 4. Confirm that the paper guides are in the correct position. 5. To use another tray, remove paper 6 in) paper, which requires the HP postcard media insert in the indicated tray. Install the HP postcard media insert in the indicated tray troubleshooting 363
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 396
    the HP premium protection warranty for that supply has ended. Press the OK button to continue. If print quality is no longer acceptable, replace the print cartridge. See Print cartridges on page 74. MANUALLY FEED < exit the message and then press the OK button. 364 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 397
    manual duplex job and is waiting for the user HP supply. Any product repair required as a result of using non-HP or unauthorized supplies is not covered under warranty. HP Performing... COLOR BAND TEST The color-band necessary. Processing duplex job Do not comes while printing a duplex job. Do not
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 398
    . RAM DISK NOT INITIALIZED This file-storage component must be initialized before use. Use the HP Embedded Web Server or HP Web Jetadmin to initialize the component. Ready The product is online and ready for data. door. 2. Remove the orange cartridge locks. 366 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 399
    . After the fuser kit reaches its approximated end of life, HP's premium Protection Warranty on that fuser kit ends. CAUTION: The color supply has reached its estimated end of life. However, the color supply might still be able to produce acceptable print quality. No user troubleshooting 367
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 400
    have set the COLOR CARTRIDGES items to printing in color, either replace of life, HP's premium Protection in the need to service the product. REPLACE TRANSFER HP's premium Protection Warranty on that transfer kit ends. Replace the transfer kit. Instructions COLOR USE setting for a particular user
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 401
    it. Rotating Motor To exit press A component test is in progress; the Press the stop button component selected is the cartridge this test more print-cartridge slots contain the Install the correct color cartridge in each slot. wrong color print cartridge. From left to right, the
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 402
    is no longer acceptable. After an HP supply has reached the very low threshold, the HP premium protection warranty for that supply has ended. To continue printing in color, either replace the supply or reconfigure menu, see Manage supplies menu on page 318. 370 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 403
    print quality is no longer acceptable, replace the transfer kit. Instructions are included with the new transfer kit. TRANSFER KIT LOW LESS HP supply has reached the very low threshold, the HP premium protection warranty for that supply has ended. To continue printing in color troubleshooting 371
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 404
    print on a small paper size that requires the HP postcard mediainsert to be installed in this tray. memory Install additional memory in the product. or configuration problem. Unsupported data on [FS] DIMM in slot x file system is not a type that the product supports. [FS] can be either a ROM or Flash
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 405
    print cartridge is for a different HP product. If print quality is no longer acceptable, replace the print cartridge. For a list of supported print cartridges, see Parts and If you believe you purchased a genuine HP supply, go to www.hp.com/go/ anticounterfeit. ENWW Tools for troubleshooting 373
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 406
    messages (continued) Description Recommended action WAIT FOR PRINTER TO REINITIALIZE This message can appear for a print cartridge from that slot, and install a cartridge that is the correct color. YELLOW CARTRIDGE LOW The product indicates when a supply level is low. Actual problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 407
    quality is no longer acceptable. After an HP supply has reached the very low threshold, the HP premium protection warranty for that supply has ended quality is no longer acceptable. After an HP supply has reached the very low threshold, the HP premium protection warranty for that supply has ended
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 408
    log. For additional numeric messages, see the control-panel message section in this manual. See Control-panel messages on page 345. Print an event log Use the event log to help diagnose and solve product problems. 1. Press the Home button. 2. Press the down arrow to highlight DIAGNOSTICS, and then
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 409
    3-56 Sample event log hp color LaserJet CP 4520 Series Event Log Page 1 1 2 3 45 6 7 1 Product information 2 Event number 3 Date and time 4 Engine cycles 5 Event log code 6 Firmware version number 7 Description of personality Clear the event log Use the SERVICE menu to clear the
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 410
    .08.00 13.11.00 13.12.00 378 Chapter 3 Solve problems Description Black toner cartridge Cyan toner cartridge Magenta toner cartridge Yellow toner JAM NON-SPECIFIC PAPER JAM DUPLEX TURN AROUND, PAPER STOPPED JAM DUPLEX PATH, PAPER LATE JAM Comments Printing monochrome after the color cartridge out
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 411
    DUPLEX PATH, PAPER STOPPED JAM FUSER ACCORDION JAM PRINTER supported environment. If the error persists, replace the CN1 environment sensor. Printer error Developer failure Printer error Density sensor failure. Printer and then press the OK button. Printer error Rotary motor error Drum phase
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 412
    misregistration is out the OK button. of range. 4. Press the down arrow to highlight FULL CALIBRATE NOW, and then press the OK button. Printer error ITB speed control sensor. CPR sensor abnormal Replace RD sensor assembly. Auto clean error Check RD sensors tor toner residue. 380 Chapter
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 413
    and tray on page 161. DCC restored DCC NVRAM was restored from the formatter. Color table error This event occurs when the color table cannot read a table from the disk and the component reverts to the version . The permanent storage date does not match the engine. Tools for troubleshooting 381
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 414
    .07 99.00.08 99.00.09 99.00.10 99.00.11 99.00.12 99.00.13 99.00.28 382 Chapter 3 Solve problems Description Comments The permanent storage date does match the engine. Disk error: either the number does not match or the write failed New registration roller
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 415
    jams Common causes of jams The product is jammed. Cause Solution The paper does not meet specifications. Use only paper that meets HP specifications. See the product user guide. A component is installed incorrectly. Verify that the transfer belt and transfer roller are correctly installed
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 416
    locks have been removed from the product. Always use the HP postcard media insert when printing on 10 x 15 cm (4 x 6 in) paper, problems Tray5(Option Feeder3) Description SR4 (PDU) Tray 3 feed sensor Item E BC A E Tray1 T X b Description SR22 Duplex re-pickup sensor (duplex models
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 417
    at T, X, b, A, B/C, D, or E ● Media jammed at any position 13.1C.00 ● Media fuser wrap Description SR6 Delivery tray media full sensor Registration stop position Duplex media waiting position 1 (duplex models only) Duplex media waiting position 2 (duplex models only) ENWW Clear paper jams 385
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 418
    Jam locations Use this illustration to identify locations of jams. In addition, instructions appear on the control panel to direct you to the location of jammed paper and how to clear it. right door on page 387. See Clear jams in the output bin area on page 390. 386 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 419
    Type of jam 13.XX.YY JAM IN TRAY 1 13.XX.YY JAM IN TRAY 2 13.XX.YY JAM IN OPTIONAL TRAYS 13.XX.YY JAM IN LOWER RIGHT DOOR Procedure See Clear jams in Tray 1 on page 390. See Clear jams in Tray 2 or optional Trays 3, 4, or 5 on page 392. See Clear jams in Tray 2 or optional Trays 3, 4, or 5 on page
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 420
    the fuser to cool before handling it. 6. Grasp the fuser handles, lift up slightly, and pull straight out to remove the fuser. 388 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 421
    7. Open the jam-access door. If paper is jammed inside the fuser, gently pull it straight up to remove it. If the paper tears, remove all paper fragments. CAUTION: Even if the body of the fuser has cooled, the rollers that are inside could still be hot. Do not touch the fuser rollers until they have
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 422
    . 2. If you cannot remove the paper, or if no jammed paper is visible in Tray 1, close Tray 1 and open the right door. 390 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 423
    3. Gently pull the paper out of the pick up area. 4. Close the right door. ENWW Clear paper jams 391
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 424
    jammed or damaged sheets of paper. To access jammed paper from the tray cavity, remove Tray 2 from the product. 2. Close the tray. 392 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 425
    Clear jams in the lower right door (Tray 3, 4, or 5) 1. Open the lower right door. 2. If paper is visible, gently pull the jammed paper up or down to remove it. 3. Close the lower right door. ENWW Clear paper jams 393
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 426
    assembly on page 145. See Manual sensor test (special-mode test) on page 246 for troubleshooting information. Poor contact of the page. See Cleaning page on page 306. The guide of the fuser delivery unit is dirty. Clean the guide. The fuser roller or the pressure roller is worn problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 427
    the output bin full sensor and (J128) on the DC tray has a poor connection. controller PCA. The output bin full sensor is defective. Run the manual sensor test to verify the output bin full sensor is functioning properly. See F output bin full sensor on page 251. If not, replace the sensor
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 428
    Duplex re-pickup sensor (SR22): Replace the registration assembly. See Registration assembly on page 128. If service was recently performed on the product, a sensor connector might be disconnected. Run the manual sensor and (J115) on the DC controller PCA. 396 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 429
    properly. See Manual sensor test (special-mode test) on page 246 for information. If it is not, replace the registration assembly. See Registration assembly on page 128. Jams in the duplex area (HP Color LaserJet CP4525dn, HP Color LaserJet CP4025dn, and HP Color LaserJet CP4525xh only) Table
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 430
    duplex re-pickup sensor (SR22) is defective. Run the manual sensor test to verify that the duplex re-pickup sensor (SR22) is functioning properly. See Manual duplex reverse solenoid connector Reconnect the connector (J69) of the duplex defective. Run the manual sensor test. See Manual sensor test (
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 431
    reverse sensor (J8) and sensor connector (J90) and the duplexing driver PCA (J107). The duplex repickup sensor (SR22) is defective. Run the manual sensor test to verify that the duplex repickup sensor is functioning properly. See Manual sensor test (special-mode test) on page 246 for information
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 432
    to verify that the paper-feeder media feed sensor is functioning properly. See Manual sensor test 2 (special-mode test) on page 259 for information. If it is not, replace the pickup assembly of the specific tray. See Pickup assembly (optional paper feeder) on page 226. ● Tray 3: Reconnect connectors
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 433
    motor drive connector. Reconnect the connector (J409) on the paper feeder driver PCA and connector (J14). The paper-feeder pickup motor is defective. . See Manual sensor test 2 (special-mode test) on page 259 for information. If it is not, replace the pickup assembly of the specific tray. See
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 434
    arrow / to highlight the appropriate setting, and then press the OK button. 6. Press the Home button to return to the Ready state. 402 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 435
    meets HP paper specifications for this product. Make sure that the paper guides match printer driver. Confirm that the settings in the software program and printer driver are correct, because the software program settings override the printer driver and control panel settings, and the printer driver
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 436
    the rear and width paper guides are touching the paper. The manual-feed prompt is set to ALWAYS. The product always prompts for manual feed, even if the for the input tray. Trays configured for a paper type with a specific weight range will not match a print job that specifies an exact problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 437
    size is not configured correctly for the input tray. The guides in the tray are not against the paper. Solution The optional printer driver. Use the product control panel to configure the tray to the paper type loaded. Transparencies or glossy paper might not meet supported paper specifications
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 438
    that the envelope is loaded correctly. Refer to the HP LaserJet Printer Family Print Media Guide. Configure Tray 1 size for envelopes. Output is curled or wrinkled Output is curled or wrinkled Cause Solution Paper does not meet the specifications for this product. Use only paper that meets the
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 439
    configuration is not set for duplexing. The HP Color LaserJet CP4525 and HP Color LaserJet CP4525n models do not support automatic 2-sided printing. In Windows, run the automatic configuration feature: 1. Click the Start button, point to Settings, and then click Printers (for Windows 2000) or
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 440
    manual print modes Try the following multi-purpose (MP) modes to see if they solve the image-quality problems and print-quality defects occur on HP Tough Paper or Opaque film. With highhumidity environment and print-quality defects occur on color transparencies on the first page of a print
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 441
    ghosting outlines that look like a finger or fingers. Set to ALTERNATIVE 3 when the other alternatives do not correct the problem. PROCESS CLEANING PAGE Generates and processes a fuser cleaning page for the dn printer and HP Color LaserJet CP4525xh printer only. ENWW Use manual print modes 409
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 442
    that meets HP specifications, or running a cleaning page. Image defects table The following examples depict letter-size paper that has passed through the product short-edge first. These examples illustrate problems that would affect all the pages that you print, whether you print in color or in
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 443
    . Solution Clean each contact of the color that produces the all black or solid color. If the problem remains after cleaning, check the contacts 90. The fuser inlet guide or separation guide is dirty. Clean the dirty parts. If the dirt does not come off, replace the guide. The pressure roller is
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 444
    Problem Sample Vertical white lines appear in a particular color. Vertical white lines appear in all colors. Horizontal lines appear on cartridge and re-install. The PGCs will clean the glass. If the problem persists, replace the affected print cartridge. The laser/scanner-unit mirror is dirty
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 445
    primary charging bias or developing bias contacts between the print cartridge and the product. Clean each contact of the color that produces the missing color. If the problem remains after cleaning, check the contacts for damage. Replace any deformed or damaged parts. The print cartridge (primary
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 446
    close the front door several times to clean the RD sensor. If the problem persists, replace the RD sensor. See Registration density (RD) sensor assembly the affected color. The product has residual media. Remove the residual media. The fuser inlet guide is dirty. Clean the fuser inlet guide. The
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 447
    Problem The printed page contains wrinkles or creases. Sample The front of the page is dirty. Repetitive horizontal lines Pages have flecks of toner Pages have one or more skewed color planes (can appear on the right or left side of the page) Cause Solution The roller or media feed guide HP
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 448
    or the spongy surfaces of rollers. Skin oils and fingerprints can cause print quality problems. Clean the paper path 1. Press the Home button . 2. Press the CREATE CLEANING PAGE option, and then press the OK button. Follow the instructions on the printed page. 5. Press the up arrow or down arrow /
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 449
    Solve performance problems Problem Pages print but are totally blank. Pages print very best print quality. Large batches, narrow paper, and special paper such as gloss, transparency, cardstock, and HP Tough Paper can slow the print job. Print in smaller batches, on a different type of paper, or
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 450
    that they are installed correctly with the correct printer drivers. 6. Are other users able to print? The problem may be workstation-specific. Check the workstation network drivers, printer drivers, and redirection (capture in Novell NetWare). 7. If other users are able to print, are they using the
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 451
    page. You can also use the embedded Web server to check the status of other protocols. See the product user guide. 9. Does the product appear in HP Web Jetadmin or other management application? ● Verify network settings on the Network configuration page. ● Confirm the network settings for
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 452
    PIN number. The PINs for the HP Color LaserJet Enterprise CP4020-CP4520 Series are 11402509 and 11452509. 1. Press the Home button. 2. Press the down arrow to highlight SERVICE, and then press the OK button two categories: total mono pages and total color pages. 420 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 453
    of the print engine when it was refurbished. This menu item allows SERVICE ID to be reset after being refurbished, if total page count minus refurbish page count is less than 500. Without this menu item, SERVICE ID could not be reset, if the calculated page count was less than
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 454
    REGISTRATION ROLLER MEDIA SENSOR VALUE 422 Chapter 3 Solve problems Use this item to show the date that the product was first used on the control panel. This eliminates the need for users to keep paper receipts for proof of warranty. Restore the service ID If you replace the formatter, the date is
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 455
    the page counts, the calibration settings, and the EIO card. Use the SERVICE menu to restore the serial number and page counts. You also need to supplies status page, gather the following information: ● Total page count and color page count ● Serial number 1. Turn the product on and watch the
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 456
    button. 4. Press the down arrow to highlight the RESTORE FACTORY SETTINGS menu, and then press the OK button. Product updates To download the most recent firmware upgrade for the product, go to www.hp.com/go/ cljcp4025_firmware or www.hp.com/go/cljcp4525_firmware. 424 Chapter 3 Solve problems ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 457
    4 Parts and diagrams ● Order parts, accessories, and supplies ● Part numbers ● Screws ● How to use the parts lists and diagrams ● External covers, panels, and doors ● Right door assembly ● Front door assembly ● Internal components ● Assessories ● Alphabetical parts list ● Numerical parts list ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 458
    your local authorized HP service center. ● Supplies and accessories: To order supplies in the U.S., go to www.hp.com/go/ljsupplies. To order supplies worldwide, go to www.hp.com/ghp/buyonline.html. To order accessories, go to www.hp.com/support/cljcp4025 or www.hp.com/support/cljcp4525. 426 Chapter
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 459
    Product name1 Product number HP Color LaserJet standard black print CE260A cartridge (11K) HP Color LaserJet high capacity black CE260X print cartridge (16K) HP Color LaserJet cyan print cartridge CE261A HP Color LaserJet yellow print cartridge CE262A HP Color LaserJet magenta print cartridge
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 460
    (CSR) parts Product name Product number Formatter assembly kit HP postcard media insert replacement Feed and separation roller kit ( fuser kit CE246A CE247A Internal hard-disk drive kit Fuser cleaning kit Service manual Part number CC493-69001 CC497-67902 CC493-67907 CC493-67908 CC493-67906
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 461
    simplex CC492-67902 Secondary transfer assembly kit, duplex CC492-67901 Guide, paper feed, simplex RC2-4566-000CN Duplexing guide assembly, duplex RM1-5531-000CN Fuser drive assembly, simplex RM1-6702-000CN Fuser drive assembly, duplex RM1-5656-000CN Simplex delivery assembly kit CC493
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 462
    Screws NOTE: The screw illustrations in the following table are for reference only. Screws might vary in size and appearance from those shown in this table. Table 4-4 Common fasteners Example Description Size Part Number Screw, with washer M3X8 XA9-1420-000CN Screw, tapping, truss head
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 463
    is listed in the description column. Doing so will ensure that the part number selected is for the correct all-in-one model. NOTE: In this manual, the abbreviation "PCA" stands for "printed circuit-board assembly." Components described as a PCA might consist of a single circuit board or a circuit
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 464
    External covers, panels, and doors Figure 4-1 External covers, panels, and doors 9 15 3 15 6 16 10 16 *A01 7 15 2 15 1 12 15 11 Front door assembly See Figure 4-3 4 14 15 8 15 5 Right door assembly See Figure 4-2 13 15 432 Chapter 4 Parts and diagrams ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 465
    Table 4-5 External covers, panels, and doors; Ref Description 1 Grip, left front 2 Grip, left rear 3 Cover, left upper 4 Cover, right front 5 Cover, right rear 6 Cover, upper 7 Cover, left lower 8 Cover, inner 9 Tray, face-down swing 10 Cover, left rear 11 Control-panel
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 466
    Right door assembly Figure 4-2 Right door assembly *A06 *A07 *A06 *A08 *A06 *A04 *A03 *A06 *A05 *A02 *A01 *A06 3 *A09 *A09 2 434 Chapter 4 Parts and diagrams 1 ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 467
    Table 4-6 Right door assembly Ref Description 1 Right door assembly 3 Cover, M.P. crossmember R Part number Qty RM1-5509-000CN 1 RC2-4747-000CN 1 ENWW Right door assembly 435
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 468
    Front door assembly Figure 4-3 Front door assembly *A18 *A01 *A11 *A13 *A05 *A17 *A08 *A10 1 *A16 *A09 *A18 *A03 *A18 *A19 *A02 *A15 *A07 *A01 *A07 *A17 *A06 *A14 *A12 436 Chapter 4 Parts and diagrams ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 469
    Table 4-7 Front door assembly Ref Description 1 Front door assembly Part number Qty RM1-5506-000CN 1 ENWW Front door assembly 437
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 470
    Internal components Internal components (1 of 7) Figure 4-4 Internal components 1 of 7 5 9 (FM3) (J62) 1 6 3 4 9 DUPLEX MODEL 2 SIMPLEX MODEL 2 (SR5) (J48) 8 7 438 Chapter 4 Parts and diagrams ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 471
    Table 4-8 Internal components (1 of 7) Ref Description 1 Paper delivery fan assembly 2 Guide, paper feed, simplex 2 Duplexing guide assembly, duplex 3 Paper delivery fan duct assembly 4 Holder, cable 5 Rod, paper delivery fan 6 Spring, compression 7 Holder, right door handle 8
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 472
    Internal components (2 of 7) Figure 4-5 Internal components 2 of 7 26 19 20 22 PCA See Figure 4-18 22 26 A (J68) 25 (J1) (J2) (J3) (J4) 13 16 A 15 16 26 23 21 17 23 9 24 5 3 PCA See Figure 4-18 26 27 26 14 24 26 26 19 1 5 3 26 2 *A01 6 11 26 10 78 12 4 18 26 440 Chapter
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 473
    CRG. lock 4 Tray, waste toner catch 5 Spring, torsion 7 Spring, grounding 8 Bushing 12 Lifter base assembly 17 Cover 18 Cover 19 Crg. Guide lower assembly 20 Shutter assembly 21 Shutter assembly 22 Shutter arm assembly 23 Shutter arm assembly Part number Qty RC2-9719-000CN
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 474
    Internal components (3 of 7) Figure 4-6 Internal components 3 of 7 (J60) *A04 21 25 10 *A04 9 7 1 (J82) (J66) 20 *A04 2 22 25 *A05 24 4 (SR7) (J46) *A01 25 5 6 25 12 Tray See Figure 4-11 25 17 15 18 14 (SW5) (J45) 23 (SW3) 16 (J84) (SW2) 25 8 (FT1) (SW1) (FT2) 25 19 11 *A03
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 475
    -2316-000CN 4 7 Front inner cover upper assembly RM1-5495-000CN 1 8 Interlock assembly RM1-5496-000CN 1 9 Waste toner collection kit (includes instructions and wipe) CC493-67913 1 10 Waste toner duct assembly RM1-5519-000CN 1 11 Power switch assembly RM1-5582-000CN 1 12 Front
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 476
    Internal components (4 of 7) Figure 4-7 Internal components 4 of 7 10 18 1 (SR9) 19 20 (J19) 11 *A02 (J78) *A04 *A01 9 3 20 8 14 20 (J63) 2 Paper delivery assembly 20 See Figure 4-16 13 20 (SR6) (J47) 18 4 20 5 *A03 6 (FM2) (J65) 17 7 *A05 4 16 *A05 Fuser assembly See Figure 4-
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 477
    one scanner assy.) CC493-67914 2 10 Position detect assembly RM1-5500-000CN 1 11 Front light guide assembly RM1-5492-000CN 1 12 Intermediate transfer belt kit (includes instructions, ITB, and T2 CC493-67909 1 roller) 18 Photo interrupter WG8-5696-000CN 1 ENWW Internal components
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 478
    Internal components (5 of 7) Figure 4-8 Internal components 5 of 7 16 16 *A01 *A01 12 Right door assembly See Figure 4-2 *A04 17 22 22 18 *A03 Paper pickup assembly 20 See Figure 4-12 *A03 1 16 6 21 5 16 11 8 15 19 16 2 *A02 16 10 9 16 Secondary 7 transfer assembly See
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 479
    Qty 2 Cover, inner RC2-3981-000CN 1 3 Shaft support (included in secondary transfer kit; see Figure 4- RC2-4162-000CN 1 15) 4 Spacer RC2-4514-000CN 1 6 Guide RC2-4527-000CN 1 7 Link, right door RC2-4726-000CN 1 8 Guide, cassette option RC2-4741-000CN 1 9 Holder, duct
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 480
    (M11) (J39) (SL2) (J69) 15 3 15 2 *A02 (M2) 15 (J13) 14 (M2) 15 (J13) 14 12 DUPLEX MODEL 10 12 SIMPLEX MODEL 15 8 15 (M3),(J18) (M4),(J17) (M5),(J16) (M6),(J15) *A03 10B 10A 15 1 4 (M10) (J38) (M1) (J14) 15 11 15 ((MJ3173))15 9A 13
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 481
    drive assembly RM1-5549-000CN 1 10 Main drive assembly kit (includes instructions) CC493-67915 1 10A ITB motor assembly RM1-5777-000CN 1 Fuser drive assembly, simplex RM1-6702-000CN 1 12 Fuser drive assembly, duplex RM1-5656-000CN 1 13 Lifter assembly RM1-5914-000CN 1 16 Flat
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 482
    Internal components (7 of 7) Figure 4-10 Internal components 7 of 7 15 (J60) (J47) (J45) (J19) 9 (J128) (J129) (J201) (J113) PCA *A05 See Figure 4-18 22 (J85) (J106) (J130) (J145) (J131) (J148) (J43) (J74) (J83) (J77) 20 (J64) (J75) (J52) 23 (J152) *A01 (J261) (J87) (J147)
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 483
    assembly 10 Lower main cable assembly 11 Switch, push 14 Connecting cable assembly 15 Upper main cable assembly 16 Duplexing cable assembly, duplex 17 Feed cable assembly 18 Switch cable assembly 19 Connecting cable assembly 20 Connecting cable assembly 21 Control panel cable
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 484
    Cassettes 2-5 Figure 4-11 Cassettes 2-5 *A26 *A13 1 *A21 *A06 *A27 *A25 *A14 *A09 *A24 *A22 *A04 *A17 *A09 *A05 *A02 *A05 *A03 *A10 *A01 *A08 *A07 *A18 *A16 *A20 *A11 *A23 * A19 *A12 *A09 *A17 *A09 *A15 *A25 452 Chapter 4 Parts and diagrams ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 485
    Table 4-15 Cassette Ref Description 1 Cassette Part number Qty RM1-5928-000CN 1 ENWW Internal components 453
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 486
    Paper pickup assembly Figure 4-12 Paper pickup assembly 3 *A09 *A03 *A07 *A02 *A11 *A28 *A15 3 (J58) *A33 *A08 *A10 *A13 *A12 *A04 *A29 *A15 *A06 (SL4) (J59) *A30 *A36 1 *A32 *A14 *A05 *A34 *A35 *A16 *A37 2 *A31 *A25 *A26 *A19 *A22 *A23 *A21 *A38 *A20 *A18 *A27 *A01 *
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 487
    Table 4-16 Paper pickup assembly Ref Description 1 Roller, paper pickup 2 Paper feed roller 3 Paper pickup assembly Part number Qty RL1-2099-000CN 1 RM1-0037-020CN 2 RM1-5919-000CN 1 ENWW Internal components 455
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 488
    Tray 1 paper pickup assembly Figure 4-13 Tray 1 paper pickup assembly *A08 *A14 *A18 *A10 1 *A12 *A01 *A13 *A03 *A16 *A26 *A20 *A04 *A13 *A01 *A09 2 *A11 *A22 *A21 *A15 *A23 *A19 *A26 *A26 *A17 (SL3) *A25 (J52) *A33 *A27 *A29 *A02 *A06 *A05 *A31 *A32 *A30 *A32 *A34 (J75) *A07 *A26 (
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 489
    Table 4-17 Tray 1 paper pickup assembly Ref Description 1 Pickup roller (Tray 1) kit (includes instructions) 2 Separation pad (Tray 1) Part number Qty CC493-67906 1 RL1-1937-000CN 1 ENWW Internal components 457
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 490
    *A24 *A27 *A42 *A05 *A28 *A07 *A25 *A39 *A30 *A26 *A38 *A05 *A42 *A03 *A32 *A02 *A01 *A40 *A45 *A05 *A42 *A16 *A37 *A34 SIMPLEX MODEL (CL1) (J53) *A22 DUPLEX MODEL *A36 *A33 *A13 (J27) (J23) (J74) (J77) (J53) (J20) (J21) *A41 458 Chapter 4 Parts and diagrams ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 491
    Table 4-18 Registration assembly Ref Description Part number Qty 1 Registration assembly kit, simplex (includes instructions) CC493-67916 1 1 Registration assembly kit, duplex (includes instructions) CC493-67917 1 ENWW Internal components 459
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 492
    Figure 4-15 Secondary transfer assembly 2 *A02 1 *A09 *A19 *A01 *A10 *A11 *A19 *A13 *A12 *A07 *A20 *A05 *A03 *A16 *A18 *A14 *A21 *A17 *A15 *A08 DUPLEX MODEL *A25 *A04 *A06 *A24 *A22 DUPLEX MODEL *A23 *A26 DUPLEX MODEL 460 Chapter 4 Parts and diagrams ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 493
    assembly Ref Description Part number Qty 1 Secondary transfer roller assembly kit (includes instructions) CC493-67908 1 2 Secondary transfer assembly, duplex kit (includes shaft-support CC493-67901 1 clip; # 3 Figure 4-8) 2 Secondary transfer assembly, simplex kit (includes shaft
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 494
    *A12 *A30 SR6 J47 *A04 *A01 *A26 *A13 *A25 *A06 *A27 *A10 *A16 *A16 *A07 *A23 *A03 *A07 *A23 *A11 *A02 *A19 *A27 *A17 *A26 DUPLEX MODEL *A15 *A20 *A18 *A24 *A05 *A09 *A27 *A21 *A08 *A22 DUPLEX MODEL *A14 462 Chapter 4 Parts and diagrams ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 495
    Table 4-20 Delivery assembly Ref Description 1 Simplex delivery assembly kit 1 Duplex delivery assembly kit Part number Qty CC493-67918 1 CC493-67919 1 ENWW Internal components 463
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 496
    Fuser assembly Figure 4-17 Fuser assembly 1 464 Chapter 4 Parts and diagrams ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 497
    Table 4-21 Fuser assembly Ref Description Part number Qty 1 Fuser 110 V assembly kit (includes instructions) CC493-67911 1 1 Fuser 220 V assembly kit (includes instructions) CC493-67912 1 ENWW Internal components 465
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 498
    PCAs Figure 4-18 PCAs 3 8 4 1 7 7 7 7 2 9 6 466 Chapter 4 Parts and diagrams ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 499
    voltage power supply, upper RM1-5781-000CN 1 6 Inner connecting PCA assembly RM1-5636-020CN 1 7 Toner remain PCA assembly RM1-5771-020CN 4 8 Formatter kit (exchange; includes instructions) CC493-69001 1 ENWW Internal components 467
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 500
    Assessories Paper feeders Figure 4-19 Paper feeders 1x500 Cassette 3 3x500 Cassette 3 Cassette 4 Cassette 5 468 Chapter 4 Parts and diagrams ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 501
    Table 4-23 Paper feeders Ref Description NA Cassette Part number Qty RM1-5928-000CN NA ENWW Assessories 469
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 502
    Paper feeder external covers, panels, and doors Figure 4-20 Paper feeder external covers, panels, and doors 7 *A02 5 *A04 *A01 1x500 16 15 6 *A01 3 13 12 4 13 17 14 1x500 9 *A01 15 *A05 *A01 8 *A02 11 3x500 2 *A01 *A03 *A01 1 8 10 *A01 470 Chapter 4 Parts and diagrams ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 503
    Table 4-24 Paper feeder external covers, panels, and doors Ref Description Part number Qty 4 Cover, rear lower RC2-5378-000CN 1 5 Cover, rear RC2-5379-000CN 1 7 Cover, left RC2-5393-000CN 1 8 Cover, right front, 1x500 RC2-5356-000CN 1 8 Cover, right front, 3x500 RC2-5357-000CN
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 504
    1 X 500 paper feeder main body Figure 4-21 1 X 500 paper feeder main body *A16 *A04 *A11 3 *A28 *A26 8 *A14 *A13 *A32 *A16 *A28 *A24 *A29 *A20 *A16 *A28 *A05 *A12 (J15) 4 2 (J10) (J17) (J410) (J409) (J13) (J408) (J11) (J15) (J407) (J14) (J18) *A17 *A15 1 *A09 *A33 *A16 *A16 *
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 505
    Table 4-25 1 X 500 paper feeder main body Ref Description 3 Lifter base assembly 4 Lifter assembly 7 Paper pickup drive assembly, 1x500 8 Feeder PCA assembly, 1x500 9 Paper pickup assembly Part number Qty RM1-5913-000CN 1 RM1-5914-000CN 1 RM1-5934-000CN 1 RM1-5854-000CN 1 RM1-
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 506
    3 X 500 paper feeder main body Figure 4-22 3 X 500 paper feeder main body *A08 *A08 *A23 *A17 *A15 *A02 *A09 2 *A15 *A19 *A17 *A08 1 (J10) (J410) 7 (J17) (J408) (J13) (J409) (J11) (J404) (J15) (J407) (J14) (J18) (J19) 10 8 (J22) (J406) (J25) (J21) *A12 *A11 *A26 *A15 (J405) (
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 507
    Table 4-26 3 X 500 paper feeder main body Ref Description 2 Lifter base assembly 3 Lifter assembly 6 Paper pickup drive assembly 3x500 10 Feeder PCA assembly 3x500 11 Paper pickup assembly Part number Qty RM1-5913-000CN 1 RM1-5914-000CN 1 RM1-5935-000CN 1 RM1-5958-000CN 1 RM1-
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 508
    list Table 4-27 Alphabetical parts list Description Arm, door link supporting, right Bushing Bushing Cable cover assembly Cable, flexible flat, H.V.T. Cartridge fan Cartridge fan assembly Cassette Cassette Cassette guide assembly Cassette rail left assembly Cassette rail right assembly Connecting
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 509
    , right center Cover, right front Cover, right front, 1x500 Cover, right front, 3x500 Cover, right rear Cover, right rear Cover, roller Cover, upper Crg. Guide lower assembly DC controller PCA assembly ENWW Part number RM1-5520-000CN RC2-3981-000CN RC2-5393-000CN RC2-4300-000CN RC2-8213-000CN RC2
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 510
    -5598-000CN Front inner cover upper assembly RM1-5495-000CN Front light guide assembly RM1-5492-000CN Fuser 110 V assembly kit (includes instructions) Fuser 220 V assembly kit (includes instructions) Fuser drive assembly, duplex CC493-67911 CC493-67912 RM1-5656-000CN Table and page Internal
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 511
    -4268-000CN Grip, left rear RC2-4269-000CN Guide RC2-4527-000CN Guide, cassette option RC2-4741-000CN Guide, paper feed, simplex RC2-4566-000CN H.V. power assembly RM1-5816-000CN Intermediate transfer belt kit (includes instructions, ITB, and T2 CC493-67909 roller) ITB motor assembly RM1-
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 512
    , 110V Low voltage power supply PCA assembly, 220V Lower main cable assembly Main DC motor assembly Main drive assembly kit (includes instructions) Paper delivery fan assembly Paper delivery fan duct assembly Paper feed roller Paper feed roller assembly Paper pickup assembly Paper pickup assembly
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 513
    2099-000CN Secondary transfer assembly, duplex kit (includes shaft-support CC493-67901 clip; # 3 Figure 4-8) Secondary transfer assembly, simplex kit (includes shaft-support CC493-67902 clip; # 3 Figure 4-8) Secondary transfer roller assembly kit (includes instructions) CC493-67908 Sensor cable
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 514
    Table 4-27 Alphabetical parts list (continued) Description Shutter arm assembly Shutter arm assembly Shutter assembly Shutter assembly Simplex delivery assembly kit Spacer Spring, compression Spring, compression Spring, grounding Spring, grounding Spring, tension Spring, tension Spring, tension
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 515
    Table 4-27 Alphabetical parts list (continued) Description Upper main cable assembly Waste toner collection kit (includes instructions and wipe) Waste toner detect assembly Waste toner duct assembly Waste toner motor assembly Waste toner paper feed assembly Part number RM1-5800-000CN CC493-
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 516
    Registration assembly kit, duplex (includes instructions) Simplex delivery assembly kit Duplex delivery assembly kit Registration 441 Holder, cable Internal components (1 of 7) on page 439 Arm, door link supporting, right Internal components (5 of 7) on page 447 Rod, paper delivery fan
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 517
    000CN Spring, grounding RC2-4470-000CN Bushing RC2-4483-000CN Cover, roller RC2-4514-000CN Spacer RC2-4527-000CN Guide RC2-4547-000CN Tray, face-down swing RC2-4566-000CN Guide, paper feed, simplex RC2-4573-000CN Holder, right door handle RC2-4726-000CN Link, right door ENWW Table
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 518
    Table 4-28 Numerical parts list (continued) Part number Description RC2-4741-000CN Guide, cassette option RC2-4747-000CN Cover, M.P. crossmember R RC2-5356-000CN Cover, right front, 1x500 RC2-5357-000CN Cover, right front, 3x500 RC2-5377-000CN Door,
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 519
    assembly RM1-5500-000CN Position detect assembly RM1-5501-000CN Paper delivery fan assembly RM1-5502-000CN Contact assembly RM1-5504-000CN Cassette guide assembly RM1-5506-000CN Front door assembly RM1-5507-000CN Right handle cover assembly RM1-5508-000CN Rear cover assembly RM1-5509
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 520
    -5521-000CN Main DC motor assembly RM1-5525-000CN Paper feed roller assembly RM1-5531-000CN Duplexing guide assembly, duplex RM1-5545-000CN Waste toner detect assembly RM1-5546-000CN Duplexing drive assembly RM1-5549-000CN Paper pickup drive assembly RM1-5582-000CN Power switch assembly
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 521
    -000CN Connecting cable assembly RM1-5800-000CN Upper main cable assembly RM1-5801-000CN Lower main cable assembly RM1-5803-000CN Duplexing cable assembly, duplex RM1-5804-000CN Feed cable assembly RM1-5807-000CN Switch cable assembly RM1-5811-000CN Connecting cable assembly RM1-5812
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 522
    Table 4-28 Numerical parts list (continued) Part number Description RM1-5928-000CN Cassette RM1-5929-000CN Paper pickup assembly RM1-5929-000CN Paper pickup assembly RM1-5934-000CN Paper pickup drive assembly, 1x500 RM1-5935-000CN Paper pickup drive assembly 3x500 RM1-5936-000CN Right
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 523
    Table 4-28 Numerical parts list (continued) Part number Description WC2-5637-000CN Switch, push WC4-5303-000CN Switch WG8-5696-000CN Photo interrupter, TLP1243 WG8-5696-000CN Photo interrupter WG8-5696-000CN Photo interrupter Table and page Internal components 7 of 7 on page 451
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 524
    492 Chapter 4 Parts and diagrams ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 525
    A Service and support ● Hewlett-Packard limited warranty statement ● HP's Premium Protection Warranty: LaserJet print cartridge limited warranty statement ● HP Color LaserJet Fuser Kit Limited Warranty Statement ● End User License Agreement ● Customer self-repair warranty service ● Customer support
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 526
    Hewlett-Packard limited warranty statement HP PRODUCT HP Color LaserJet CP4025n, CP4025dn, CP4525n, CP4525dn, CP4525xh DURATION OF LIMITED WARRANTY One-year on-site warranty HP warrants to you, the end-user customer, that HP hardware and accessories will be free from defects in materials and
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 527
    environmental specifications for the printer product or (c) exhibit wear from ordinary use. To obtain warranty service, please return the product to place of purchase (with a written description of the problem and print samples) or contact HP customer support. At HP's option, HP will either
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 528
    of the published environmental specifications for the printer product or (c) exhibit wear from ordinary use. To obtain warranty service, please return the product to place of purchase (with a written description of the problem) or contact HP customer support. At HP's option, HP will either replace
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 529
    NOT INSTALL, DOWNLOAD, OR product support pages of HP's website (hp.com) printer driver, firmware, or add-on), the HP Software may only be used with such product ("HP Product"). Additional restrictions on Use may appear in the User Documentation. You may not separate component parts of the HP
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 530
    . All intellectual property rights in the Software and User Documentation are owned by HP or its suppliers and are protected by law, HP Product, or (ii) the provision of support services related to the Software or the HP Product. All such information will be subject to HP's privacy policy. HP
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 531
    is mandatory. If you request HP to replace these parts, you will be charged for the travel and labor costs of this service. 2) Parts for which customer is required, you can call the HP Technical Support Center and a technician will help you over the phone. HP specifies in the materials shipped with
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 532
    number, date of purchase, and problem description ready. Get 24-hour Internet support www.hp.com/support/cljcp4025 or www.hp.com/support/ cljcp4525 Get support for products used with a Macintosh computer www.hp.com/go/macosx Download software utilities, drivers, and electronic information www
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 533
    B Product specifications ● Physical specifications ● Performance specifications ● Electrical specifications ● Acoustic specifications ● Environmental specifications ● Skew specifications ENWW 501
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 534
    (30.1 in) 765 mm (30.1 in) 866 mm (34.1 in) Performance specifications Print speed Resolution ● HP Color LaserJet CP4525: prints up to 42 pages per minute (ppm) on letter-size paper and 40 ppm on A4-size paper ● HP Color LaserJet CP4025: prints up to 35 pages per minute (ppm) on letter-size paper
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 535
    to Sleep = 30 minutes. 4 Heat dissipation in Ready mode = 204.8 BTU/hour. 6 HP Color LaserJet CP4525 speed is 30 ppm Letter size. Acoustic specifications Table B-5 HP Color LaserJet Enterprise CP4020-CP4520 Series13 Sound power level Declared per ISO 9296 Printing Ready Sound pressure level
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 536
    Skew specifications Table B-6 Media registration and image placement accuracy Cut sheet simplex and or text stretching - vertical ≤ 1.0 % Image or text stretching - horizontal ≤ 1.0 % Duplex registration - vertical, horizontal ≤ 2.0 mm 1 Xerox 4200 (#20) should be used for measurement
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 537
    C Regulatory information ● FCC regulations ● Environmental product stewardship program ● Declaration of Conformity ● Safety statements ENWW 505
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 538
    if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation expense. NOTE: Any changes or modifications to the printer that are not expressly approved by HP could void the user's authority to operate this equipment. Use of
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 539
    and instructions are included in every new HP LaserJet print cartridge and supplies package. You help reduce the toll on the environment further when you return multiple cartridges together rather than separately. HP is committed to providing inventive, high-quality products and services that
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 540
    instructions. The U.S. Postal Service provides no-cost cartridge return transportation services under an arrangement with HP for Alaska and Hawaii. Non-U.S. returns To participate in HP meets the guidelines outlined in the HP LaserJet Printer Family Print Media Guide. This product is suitable for the
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 541
    following: HP Color LaserJet Enterprise CP4020-CP4520 Series Type Carbon monofluoride lithium Weight 0.8 g Location On formatter board User-removable No , your household waste disposal service or the shop where you purchased the product. Chemical substances HP is committed to providing our
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 542
    obtain information about these environmental topics: ● Product environmental profile sheet for this and many related HP products ● HP's commitment to the environment ● HP's environmental management system ● HP's end-of-life product return and recycling program ● Material Safety Data Sheets Visit www
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 543
    Model Number:2) HP Color LaserJet CP4525/CP4025 series BOISB-0806-00 Including: CE423A - 3 x 500-Sheet Paper Tray Product Options: CE422A - 500-Sheet Paper Tray ALL Print Cartridges: CE260A, CE260X, CE261A, CE262A, CE263A conforms to the following Product Specifications user and Service Office
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 544
    and Human Services (DHHS) user guide may result in exposure to hazardous radiation. Canadian DOC regulations Complies with Canadian EMC Class A requirements. « Conforme à la classe A des normes canadiennes de compatibilité électromagnétiques. « CEM ». » VCCI statement (Japan) Power cord instructions
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 545
    sätt än i bruksanvisning specificerats, kan användaren utsättas för osynlig laserstrålning, som överskrider gränsen för laserklass 1. HUOLTO HP Color LaserJet CP4025n, CP4025dn, CP4525n, CP4525dn, CP4525xh - kirjoittimen sisällä ei ole käyttäjän huollettavissa olevia kohteita. Laitteen saa avata ja
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 546
    Mikäli kirjoittimen suojakotelo avataan, olet alttiina näkymättömällelasersäteilylle laitteen ollessa toiminnassa. Älä katso säteeseen. VARNING ! Om laserprinterns skyddshölje öppnas då apparaten är i funktion, utsättas användaren för osynlig laserstrålning. Betrakta ej strålen. Tiedot laitteessa kä
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 547
    12 accessories ordering 426 part numbers 427 screws 430 accessories installed, information 311 acoustic specifications 503 after-service checklist 70 AppleTalk information 310 B bands, troubleshooting 411 batteries included 509 beam-detect (BD) failure 19 bias generation high-voltage power
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 548
    iii cooling areas and fans xvii copying quality, troubleshooting 410 counts color cycle 420 mono cycle 420 page, reset 420 self repair, part numbers 428 customer support online 500 D dark image, troubleshooting 410 date codes for firmware 311 duplexing) Show Me How menu 314 516 Index ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 549
    duplex printing (double-sided) Show Me How menu 314 duplexer specifications, physical 501 duplexing unit components 52 duplex 309 firmware, downloading new 424 flowcharts troubleshooting 239 formatter operations HP Customer Care 500 HP Easy Printer Care opening 299 options 299 using 299 HP
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 550
    23 imaging drums color drums disengagement 30 detection sensors 55 diagnostic test for 245 duplex area 397 envelopes 405 fuser 346 fuser troubleshooting 410 lights formatter 242 troubleshooting with 242 lines, troubleshooting loop control 49 loose toner, troubleshooting 413 low-voltage power supply
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 551
    manual print modes 408 material restrictions 509 Material Safety Data Sheet (MSDS) 510 media Show Me How menu 314 media registration accuracy xix media sensor value Service list 345 types of 345 model number 309 motor control paper feeder online support 500 operating environment specifications 503
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 552
    Quality menu options 408 printer settings configure 321 printing modes, manual 408 period in operation sequence 3 process explained xxi stop for testing 273 troubleshooting 417 printing menu 321 problem-solving messages, types of 345 networks 338 product status HP Easy Printer Care 299 protocols
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 553
    -pickup drive assembly 178 upper-left cover 95 repeating defects, troubleshooting 312 replacing parts 68 reset product 424 resets menu 342 resolution troubleshooting quality 410 retrieve job menu 314 reverse and feed control, duplexer 52 right door jams 346 roller feed and separation roller (Trays
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 554
    to date 422 restore 422 Service menu options 129 Show Me How menu 314 skew-feed prevention 47 skewed pages troubleshooting 414 Sleep mode power specifications 502 sleep settings voltage too high during 13 smeared toner, troubleshooting 414 software HP Easy Printer Care 299 software license agreement
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 555
    also cassette trays, status HP Easy Printer Care 299 troubleshooting blank pages 417 checklist 234, 237 cleaning page for 306 color 305 configuration page 242 configuration pages for 307 control panel messages, numerical 345 demo page 242 direct-connect problems 418 duplexing 406 EP parameters 305
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 556
    Material Safety Data Sheet (MSDS) 510 ordering supplies 426 white spots, troubleshooting 411 wrinkles, troubleshooting 415 524 Index ENWW
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 557
  • HP Color LaserJet Enterprise CP4020 | Service Manual - Page 558
    © 2010 Hewlett-Packard Development Company, L.P. www.hp.com *CC489-90936* *CC489-90936* CC489-90936
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
  • 159
  • 160
  • 161
  • 162
  • 163
  • 164
  • 165
  • 166
  • 167
  • 168
  • 169
  • 170
  • 171
  • 172
  • 173
  • 174
  • 175
  • 176
  • 177
  • 178
  • 179
  • 180
  • 181
  • 182
  • 183
  • 184
  • 185
  • 186
  • 187
  • 188
  • 189
  • 190
  • 191
  • 192
  • 193
  • 194
  • 195
  • 196
  • 197
  • 198
  • 199
  • 200
  • 201
  • 202
  • 203
  • 204
  • 205
  • 206
  • 207
  • 208
  • 209
  • 210
  • 211
  • 212
  • 213
  • 214
  • 215
  • 216
  • 217
  • 218
  • 219
  • 220
  • 221
  • 222
  • 223
  • 224
  • 225
  • 226
  • 227
  • 228
  • 229
  • 230
  • 231
  • 232
  • 233
  • 234
  • 235
  • 236
  • 237
  • 238
  • 239
  • 240
  • 241
  • 242
  • 243
  • 244
  • 245
  • 246
  • 247
  • 248
  • 249
  • 250
  • 251
  • 252
  • 253
  • 254
  • 255
  • 256
  • 257
  • 258
  • 259
  • 260
  • 261
  • 262
  • 263
  • 264
  • 265
  • 266
  • 267
  • 268
  • 269
  • 270
  • 271
  • 272
  • 273
  • 274
  • 275
  • 276
  • 277
  • 278
  • 279
  • 280
  • 281
  • 282
  • 283
  • 284
  • 285
  • 286
  • 287
  • 288
  • 289
  • 290
  • 291
  • 292
  • 293
  • 294
  • 295
  • 296
  • 297
  • 298
  • 299
  • 300
  • 301
  • 302
  • 303
  • 304
  • 305
  • 306
  • 307
  • 308
  • 309
  • 310
  • 311
  • 312
  • 313
  • 314
  • 315
  • 316
  • 317
  • 318
  • 319
  • 320
  • 321
  • 322
  • 323
  • 324
  • 325
  • 326
  • 327
  • 328
  • 329
  • 330
  • 331
  • 332
  • 333
  • 334
  • 335
  • 336
  • 337
  • 338
  • 339
  • 340
  • 341
  • 342
  • 343
  • 344
  • 345
  • 346
  • 347
  • 348
  • 349
  • 350
  • 351
  • 352
  • 353
  • 354
  • 355
  • 356
  • 357
  • 358
  • 359
  • 360
  • 361
  • 362
  • 363
  • 364
  • 365
  • 366
  • 367
  • 368
  • 369
  • 370
  • 371
  • 372
  • 373
  • 374
  • 375
  • 376
  • 377
  • 378
  • 379
  • 380
  • 381
  • 382
  • 383
  • 384
  • 385
  • 386
  • 387
  • 388
  • 389
  • 390
  • 391
  • 392
  • 393
  • 394
  • 395
  • 396
  • 397
  • 398
  • 399
  • 400
  • 401
  • 402
  • 403
  • 404
  • 405
  • 406
  • 407
  • 408
  • 409
  • 410
  • 411
  • 412
  • 413
  • 414
  • 415
  • 416
  • 417
  • 418
  • 419
  • 420
  • 421
  • 422
  • 423
  • 424
  • 425
  • 426
  • 427
  • 428
  • 429
  • 430
  • 431
  • 432
  • 433
  • 434
  • 435
  • 436
  • 437
  • 438
  • 439
  • 440
  • 441
  • 442
  • 443
  • 444
  • 445
  • 446
  • 447
  • 448
  • 449
  • 450
  • 451
  • 452
  • 453
  • 454
  • 455
  • 456
  • 457
  • 458
  • 459
  • 460
  • 461
  • 462
  • 463
  • 464
  • 465
  • 466
  • 467
  • 468
  • 469
  • 470
  • 471
  • 472
  • 473
  • 474
  • 475
  • 476
  • 477
  • 478
  • 479
  • 480
  • 481
  • 482
  • 483
  • 484
  • 485
  • 486
  • 487
  • 488
  • 489
  • 490
  • 491
  • 492
  • 493
  • 494
  • 495
  • 496
  • 497
  • 498
  • 499
  • 500
  • 501
  • 502
  • 503
  • 504
  • 505
  • 506
  • 507
  • 508
  • 509
  • 510
  • 511
  • 512
  • 513
  • 514
  • 515
  • 516
  • 517
  • 518
  • 519
  • 520
  • 521
  • 522
  • 523
  • 524
  • 525
  • 526
  • 527
  • 528
  • 529
  • 530
  • 531
  • 532
  • 533
  • 534
  • 535
  • 536
  • 537
  • 538
  • 539
  • 540
  • 541
  • 542
  • 543
  • 544
  • 545
  • 546
  • 547
  • 548
  • 549
  • 550
  • 551
  • 552
  • 553
  • 554
  • 555
  • 556
  • 557
  • 558
COLOR LASERJET ENTERPRISE CP4020/CP4520
SERIES PRINTER
CP4025n
CP4025dn
CP4525n
CP4525dn
CP4525xh
Service Manual