HP LaserJet M1120 Service Manual

HP LaserJet M1120 - Multifunction Printer Manual

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  • HP LaserJet M1120 | Service Manual - Page 1
    HP LaserJet M1120 MFP Series Service Manual
  • HP LaserJet M1120 | Service Manual - Page 2
  • HP LaserJet M1120 | Service Manual - Page 3
    HP LaserJet M1120 MFP Series Service Manual
  • HP LaserJet M1120 | Service Manual - Page 4
    to change without notice. The only warranties for 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 shall not be liable for technical or editorial errors
  • HP LaserJet M1120 | Service Manual - Page 5
    model number location 6 Software description ...7 Supported operating systems 7 Supported printer drivers ...7 Software included with the product 7 Easy installation for Windows 7 Advanced installation 8 Macintosh software 8 Software for Windows ...9 Embedded Web server (network models only
  • HP LaserJet M1120 | Service Manual - Page 6
    Install the print cartridge ...21 3 Maintenance Manage supplies ...24 Life expectancies of supplies 24 Check and order supplies 24 Store supplies ...24 Replace supplies ...25 Print cartridge ...25 HP policy on non-HP supplies 26 HP service 49 After performing service ...50 Post-service
  • HP LaserJet M1120 | Service Manual - Page 7
    from the print-cartridge area 116 Avoid repeated jams ...117 Print problems ...118 Print-quality problems ...118 Improve Scan problems ...124 Solve scanned-image problems 124 Scan-quality problems ...126 Prevent problems 126 Solve scan-quality problems 126 Copy problems ...127 Prevent problems
  • HP LaserJet M1120 | Service Manual - Page 8
    cartridge contacts 133 Check the high-voltage connector assembly 134 Service-mode functions ...135 NVRAM initialization ...135 Super NVRAM initialization 135 Secondary service menu 135 Problem -panel overlays ...157 Supplementry documentation and support 160 Parts lists and diagrams ...162 Types
  • HP LaserJet M1120 | Service Manual - Page 9
    Ozone production ...190 Power consumption ...190 Toner consumption ...190 Paper use ...190 Plastics ...191 HP LaserJet print supplies 191 Return and recycling instructions 191 United States and Puerto Rico 191 Multiple returns (two to eight cartridges 191 Single returns 191 Shipping 191 Non
  • HP LaserJet M1120 | Service Manual - Page 10
    Laser statement for Finland 196 Substances table (China 196 Index ...199 viii ENWW
  • HP LaserJet M1120 | Service Manual - Page 11
    1-1 Product guides ...2 Table 1-2 Supported paper and print media sizes 12 Table 1-3 Supported envelopes and postcards 12 Table 1-4 Supported paper types Table 7-3 Control-panel overlays, HP LaserJet M1120 157 Table 7-4 Control-panel overlays, HP LaserJet M1120n 158 Table 7-5 Documentation (print
  • HP LaserJet M1120 | Service Manual - Page 12
    x ENWW
  • HP LaserJet M1120 | Service Manual - Page 13
    37 Figure 4-4 Cross-section of printer ...38 Figure 4-5 Engine control system support-frame spring (1 of 4 53 Figure 5-4 Remove the link assemblies and scanner support-frame spring (2 of 4 54 Figure 5-5 Remove the link assemblies and scanner support cartridge (1 of 2 65 Figure 5-24 Remove the print
  • HP LaserJet M1120 | Service Manual - Page 14
    (5 of 5 69 Installing the scanner cushions ...70 print-cartridge door (1 of 2 76 Remove the print-cartridge door support frame (1 of 5 86 Remove the scanner support frame (2 of 5 87 Remove the scanner support frame (3 of 5 87 Remove the scanner support frame (4 of 5 88 Remove the scanner support
  • HP LaserJet M1120 | Service Manual - Page 15
    4 104 Figure 5-87 Remove the Drive-gear assembly and drive belt (4 of 4 104 Figure 6-1 Print-cartridge high-voltage connection points (right side 133 Figure 6-2 Print-cartridge high-voltage connection points (left side 134 Figure 6-3 Formatter connectors ...142 Figure 6-4 ECU connectors ...143
  • HP LaserJet M1120 | Service Manual - Page 16
    xiv ENWW
  • HP LaserJet M1120 | Service Manual - Page 17
    1 Product information ● Quick access to product information ● Product comparison ● Product features ● Product walkaround ● Software description ● Software for Windows ● Software for Macintosh ● Uninstall software ● Media specifications ENWW 1
  • HP LaserJet M1120 | Service Manual - Page 18
    . ● www.hp.com/support/LJM1120 Table 1-1 Product guides Guide Description HP LaserJet M1120 MFP Getting Provides step-by-step instructions for installing and setting up the product. Started Guide HP LaserJet M1120 MFP Series Provides detailed information for using the product and problem-solving
  • HP LaserJet M1120 | Service Manual - Page 19
    sheets of print media. ● IPv4 network protocol. ● Tray 1 holds up to 250 sheets of print media or 10 envelopes. ● IPv6 network protocol. ● Manual two-sided (duplex) printing and copying. ● Hi-Speed USB 2.0 port. ● 32-megabyte (MB) random-access memory (RAM). ● Flatbed scanner. ENWW Product
  • HP LaserJet M1120 | Service Manual - Page 20
    less toner. ● Uses a print cartridge that has a no-shake design. ● The product ships with a 1,000-page (average yield) starter cartridge. The average yield for replacement cartridges is 2,000 pages. ● Online user guide is compatible with text screen-readers. ● Print cartridges can be installed and
  • HP LaserJet M1120 | Service Manual - Page 21
    Product walkaround Front view 1 2 3 4 6 5 1 Scanner lid 2 Control panel 3 Print-cartridge door latch 4 Output bin 5 Priority input tray 6 Tray 1 Back view 7 Interface ports 8 Power switch 9 Power connector 7 8 9 ENWW Product walkaround 5
  • HP LaserJet M1120 | Service Manual - Page 22
    Interface ports All models have a Hi-Speed USB 2.0 port, and network models also have a 10/100 Base-T Ethernet port. 1 2 1 Hi-Speed USB 2.0 port 2 Ethernet port (network models only) Serial number and model number location The serial number and product model number label is on the rear of the
  • HP LaserJet M1120 | Service Manual - Page 23
    allows you to review the license agreements and the default settings. Easy installation for Windows ● HP drivers ◦ Printer driver ◦ Scan driver ● HP MFP software ◦ HP LaserJet Scan program ◦ Uninstall program ● HP Update program ● HP Customer Participation program ENWW Software description 7
  • HP LaserJet M1120 | Service Manual - Page 24
    features that are available with the easy installation. The HP Customer Participation program is optional. Macintosh software ● HP Product Setup Assistant ● HP Uninstaller ● HP LaserJet software ◦ HP Scan ◦ HP Director ◦ Scan to e-mail program ◦ HP Photosmart 8 Chapter 1 Product information ENWW
  • HP LaserJet M1120 | Service Manual - Page 25
    use. No special software is installed or configured, but you must have a supported Web browser on your computer. problem with the product. The alert includes information about solving the problem. Other Windows components and utilities ● Software installer - automates the printing system installation
  • HP LaserJet M1120 | Service Manual - Page 26
    standard Web browser can use. No special software is installed or configured, but you must have a supported Web browser on your computer. To gain access to .) HP Director HP Director is a software program for working with documents. HP Director appears on the computer screen to initiate scanning, or
  • HP LaserJet M1120 | Service Manual - Page 27
    Uninstall software Windows 1. Click Start, and then click All Programs. 2. Click HP, and then click HP LaserJet M1120. 3. Click Uninstall, and then follow the onscreen instructions to remove the software. Macintosh To remove the software, drag the PPD files to the trash can. ENWW Uninstall
  • HP LaserJet M1120 | Service Manual - Page 28
    it adapts to various media. NOTE: To obtain best print results, select the appropriate paper size and type in the print driver before printing. Table 1-2 Supported paper and print media sizes Size Dimensions Priority input tray Tray 1 Letter 216 x 279 mm (8.5 x 11 in) Legal 216 x 356 mm
  • HP LaserJet M1120 | Service Manual - Page 29
    216 x 356 mm (8.5 x 14 in). To obtain the best print results, change the paper size and paper type settings in the printer driver before printing. Table 1-4 Supported paper types and tray capacity Type is Media specifications Priority input tray Tray 1 capacity1 Plain 75 g/m2 (20 lb) to 104
  • HP LaserJet M1120 | Service Manual - Page 30
    14 Chapter 1 Product information ENWW
  • HP LaserJet M1120 | Service Manual - Page 31
    2 Installation ● Site preparations ● What was in the box ● Install input devices ● Install supplies ENWW 15
  • HP LaserJet M1120 | Service Manual - Page 32
    humidity (no condensation) ● Humidity (printer; storage) 10% to 90% relative humidity (no condensation) ● Temperature (toner cartridge; storage) -20o to 40o C (-4o to 104o F) ● Humidity (toner cartridge; storage) 10% to 90% relative humidity (no condensation) 16 Chapter 2 Installation ENWW
  • HP LaserJet M1120 | Service Manual - Page 33
    Minimum system requirements ● Windows® 2000 ● Windows XP ● Windows Server 2003 ● Windows Vista ● Mac OS X v10.3 and later ● 128 MB RAM for Windows operating systems ● 32 MB RAM for Macintosh operating systems ● 250 MB hard-disk space (full installation) ● CD-ROM drive ● USB port ENWW Site
  • HP LaserJet M1120 | Service Manual - Page 34
    cables are not included. 5 2 3 7 6 4 1 8 Item 1 2 3 4 5 6 7 8 Description HP LaserJet M1120 MFP Print cartridge Control-panel faceplate (if not already installed) Output bin extension Start guide and support flyer CD-ROMs (software and online user guide) Power cord Tray 1 18 Chapter
  • HP LaserJet M1120 | Service Manual - Page 35
    tray before attempting to print from tray 1. Media guides ensure that the media is correctly fed into the product and that the print is not skewed (crooked on the media). When loading media, adjust the media guides to match the width of the media that you are using. ENWW Install input devices 19
  • HP LaserJet M1120 | Service Manual - Page 36
    Tray 1 1. Push tray 1 into the product. 2. Open the tray cover, and then adjust the media guides out. 3. Load the paper in the tray, snug the media guides against the stack, and then close the tray cover. 20 Chapter 2 Installation ENWW
  • HP LaserJet M1120 | Service Manual - Page 37
    Install supplies Install the print cartridge 1. Open the print-cartridge door. 2. Remove the new print cartridge from its packaging, and then rock the print cartridge back and forth. 3. Remove the orange cover from the print cartridge, and then pull the orange tab straight out to remove the sealing
  • HP LaserJet M1120 | Service Manual - Page 38
    4. Insert the cartridge into the product until it is firmly in place. 5. Close the print-cartridge door. 22 Chapter 2 Installation ENWW
  • HP LaserJet M1120 | Service Manual - Page 39
    3 Maintenance ● Manage supplies ● Clean the product ● Management tools ENWW 23
  • HP LaserJet M1120 | Service Manual - Page 40
    consumables. Life expectancies of supplies Item Capacity HP LaserJet M1120 MFP Series Recommended maximum of 3,000 pages per month Print cartridge 2,000 pages1 (standard) 1 For information about the yield for the cartridges, see www.hp.com/go/pageyield. Actual yield depends on specific
  • HP LaserJet M1120 | Service Manual - Page 41
    door. 2. Grasp the handle on the print cartridge, and then pull the cartridge straight out to remove it. See the recycling information inside the print cartridge box. 3. Remove the new print cartridge from its packaging, and then rock the print cartridge back and forth. ENWW Manage supplies 25
  • HP LaserJet M1120 | Service Manual - Page 42
    until it is firmly in place. 6. Close the print-cartridge door. CAUTION: If toner gets on any clothing, wipe it off with a dry cloth and wash the clothing in cold water. Hot water sets toner into the fabric. HP policy on non-HP supplies Hewlett-Packard Company cannot recommend the use of non
  • HP LaserJet M1120 | Service Manual - Page 43
    not be a genuine HP one if you notice the following issues: ● You are experiencing a large number of problems with the print cartridge. ● The print cartridge does not look like it usually does (for example, the pull tab or the box is different). In the United States, call toll-free: 1-877-219-3183
  • HP LaserJet M1120 | Service Manual - Page 44
    Clean the product Clean the exterior Use a soft, damp, lint-free cloth to wipe dust, smudges, and stains off of the exterior of the product. Clean the flatbed scanner glass Dirty glass, from fingerprints, smudges, hair,
  • HP LaserJet M1120 | Service Manual - Page 45
    Over time, this buildup can cause print-quality problems such as toner specks or smearing. This product has a cleaning mode that can correct and prevent these types of problems. Specks Smearing 1. Press Setup. 2. Use the arrow buttons to find the Service menu, and then press OK. 3. Use the arrow
  • HP LaserJet M1120 | Service Manual - Page 46
    the product memory. These pages help diagnose and solve problems with the product. NOTE: If the product language was not correctly set during installation, you can set the language manually so the information pages print in one of the supported languages. Change the language by using the System
  • HP LaserJet M1120 | Service Manual - Page 47
    Features The EWS allows you to view product and network status and manage printing functions from a computer. With the EWS, you can complete the following tasks: ● View product status information ● Determine the remaining life on all supplies and order new ones ● View and change part of the product
  • HP LaserJet M1120 | Service Manual - Page 48
    32 Chapter 3 Maintenance ENWW
  • HP LaserJet M1120 | Service Manual - Page 49
    4 Operational theory ● Basic operation ● Scanner functions and operation ● Internal components (base unit) ● Engine control system ● Laser/scanner system ● Pickup/feed/delivery system ● Image-formation system ENWW 33
  • HP LaserJet M1120 | Service Manual - Page 50
    Table 4-1 Sequence of operation Name Timing Purpose WAIT From power-on until the end of the main-motor initial Detects the presence of a print cartridge; clears drive potential from the drum surface and cleans the transfer roller STBY (standby) From the end of the WAIT or LSTR period until
  • HP LaserJet M1120 | Service Manual - Page 51
    voltage is turned off Forms the image on the photosensitive drum and transfers the toner image to the media From the end of the PRINT period (when high initial drive 8 High-voltage control Detect presence of a print cartridge Clean the transfer roller after the primary charging AC bias is
  • HP LaserJet M1120 | Service Manual - Page 52
    through the light guide and scanning glass and strikes the document. Light that the document reflects passes back through the scanning glass and rod lens 11 sensor driver circuits). The sensor array collects and amplifies the reflected light and converts it into serial data in the driver circuits.
  • HP LaserJet M1120 | Service Manual - Page 53
    scanner assembly moves systematically to locate its home position. It then calibrates to a white strip located under the glass at the right end of the scan tub. ENWW Scanner functions and operation 37
  • HP LaserJet M1120 | Service Manual - Page 54
    Internal components (base unit) Figure 4-4 Cross-section of printer 1 2 34 5 12 11 10 98 1 Fuser unit 2 Pressure roller 3 Fuser sleeve 4 Delivery roller 5 Laser/scanner unit 6 Single-sheet-feed slot 7 Multi-purpose tray 8 Photosensitive drum 9
  • HP LaserJet M1120 | Service Manual - Page 55
    Engine control system The engine control system coordinates all of the product functions, according to commands sent from the formatter. It drives the laser/scanner system, the image-formation system, and the pickup/feed/ delivery system. The engine control system contains the following components:
  • HP LaserJet M1120 | Service Manual - Page 56
    Figure 4-6 Engine-control-system circuit diagram Engine controller Fixing unit AC input Transfer roller Cartridge Fixing control Low-voltage power supply High-voltage power supply DC controller Formatter M Motor Solenoid Sensor Switch Laser/scanner unit 40 Chapter 4 Operational theory
  • HP LaserJet M1120 | Service Manual - Page 57
    Laser/scanner system The laser/scanner system receives video signals from the DC controller and the formatter, and then converts the signals into latent images on the photosensitive drum. Figure 4-7 Laser/scanner system ENWW Laser/scanner system 41
  • HP LaserJet M1120 | Service Manual - Page 58
    . The DC controller uses two motors and two solenoids to drive the rollers. Three media-detection sensors detect media as it passes through the printer. If media does not reach or pass each sensor within a specified time period, the DC controller determines that a jam has occurred and alerts the
  • HP LaserJet M1120 | Service Manual - Page 59
    Image-formation system Laser printing requires the interaction of several technologies, including electronics, optics, and electrophotographics, to produce a printed page. Each process functions independently and must be coordinated with the other product processes. Image formation consists of the
  • HP LaserJet M1120 | Service Manual - Page 60
    laser beam scans the photosensitive drum to neutralize negative charges on parts of the drum. An electrostatic latent image is formed on the drum where negative charges were neutralized. Step 3: Developing The developing cylinder comes in contact with the photosensitive drum to deposit toner onto
  • HP LaserJet M1120 | Service Manual - Page 61
    by weakening any electrostatic adhesion. Figure 4-13 Separation Step 6: Fusing The DC negative bias applied to the fusing film strengthens the holding force of the toner on the print media and prevents the toner from scattering. ENWW Image-formation system 45
  • HP LaserJet M1120 | Service Manual - Page 62
    Figure 4-14 Fusing Step 7: Drum cleaning The cleaning blade scrapes the residual toner off of the photosensitive drum and deposits it into the waste-toner case. Figure 4-15 Drum cleaning 46 Chapter 4 Operational theory ENWW
  • HP LaserJet M1120 | Service Manual - Page 63
    5 Removal and replacement ● Removal and replacement strategy ● Scanner assembly ● Product base ENWW 47
  • HP LaserJet M1120 | Service Manual - Page 64
    HP does not support the repairing of individual subassemblies or troubleshooting wire loops, lance points, or wire-harness guides. Removal and replacement warnings, cautions, notes, servicing this product. CAUTION: Do not bend or fold the flat flexible cables (FFCs) during removal or installation.
  • HP LaserJet M1120 | Service Manual - Page 65
    body static by grasping the print engine chassis before touching an ESD- sensitive component. Ground the print engine chassis before servicing the product. Required tools ● #2 Phillips screwdriver with magnetic tip ● Small flat-blade screwdriver ● Long flat-blade screwdriver ● Needle-nose pliers
  • HP LaserJet M1120 | Service Manual - Page 66
    not available, discharge body static and ground the print engine chassis before touching an ESDsensitive part. ● Remove the print cartridge. See Print cartridge on page 25. After performing service ● Replace the print cartridge and input tray. ● Reload the input tray with media. ● Perform the post
  • HP LaserJet M1120 | Service Manual - Page 67
    Post-service tests After service has been completed, the following tests can be used to verify that the repair or replacement was successful. Test 1 (print-quality test) 1. Verify that you
  • HP LaserJet M1120 | Service Manual - Page 68
    before servicing. NOTE scan module, the scan motor, and the cable. Figure 5-2 Parts removal order Flatbed lid Flatbed lid Flatbed lid white plate Link assemblies and scanner support-frame springs Control-panel overlay Control-panel assembly Print cartridge Transfer roller Media input tray Printer
  • HP LaserJet M1120 | Service Manual - Page 69
    than your product. However, this does not affect the validity of the procedures in this chapter. Link assemblies and scanner support-frame spring 1. Push the print-cartridge access button and raise the scanner assembly until it is locked open. 2. Use a small flat-blade screwdriver to release the
  • HP LaserJet M1120 | Service Manual - Page 70
    3. Rotate a link assembly toward the front of the product until the link disengages from the scanner support frame. Figure 5-4 Remove the link assemblies and scanner support-frame spring (2 of 4) 4. Remove the link assembly. Repeat these steps to remove the remaining link. Figure 5-5 Remove the link
  • HP LaserJet M1120 | Service Manual - Page 71
    5. Use needle-nose pliers to remove the scanner support-frame spring. Figure 5-6 Remove the link assemblies and scanner support-frame spring (4 of 4) ENWW Scanner assembly 55
  • HP LaserJet M1120 | Service Manual - Page 72
    to remove it from the scanner assembly. CAUTION: Avoid touching the flatbed glass. Skin oils and fingerprints can contaminate the glass and cause print-quality problems. Figure 5-8 Remove the scanner lid (2 of 2) 56 Chapter 5 Removal and replacement ENWW
  • HP LaserJet M1120 | Service Manual - Page 73
    away from the product to remove it. CAUTION: Be careful to not damage the overlay if it will be reinstalled after servicing the device. TIP: When installing a replacement control-panel overlay, you can dispose of the barcode part-number portion of the replacement overlay. Figure 5-9 Remove the
  • HP LaserJet M1120 | Service Manual - Page 74
    Control-panel assembly CAUTION: The control-panel is an ESD-sensitive component. 1. Remove the control-panel overlay. See Control-panel overlay on page 57. 2. Remove one screw (callout 1). Figure 5-10 Remove the control-panel assembly (1 of 3) 1 3. Slide the control panel forward and slightly lift
  • HP LaserJet M1120 | Service Manual - Page 75
    4. Disconnect one FFC (callout 2). Remove the control-panel assembly. CAUTION: Do not bend or fold the FFCs during the removal or reinstallation process. Figure 5-12 Remove the control-panel assembly (3 of 3) 2 ENWW Scanner assembly 59
  • HP LaserJet M1120 | Service Manual - Page 76
    CAUTION: Avoid touching the flatbed glass. Skin oils and fingerprints can contaminate the glass or pad and cause print-quality or paper-pickup problems. 1. Remove one screw (callout 1). Figure 5-13 Remove the scanner assembly (1 of 10) 1 2. Release one tab on the back side of the cover. Figure
  • HP LaserJet M1120 | Service Manual - Page 77
    3. Release the bottom tab (callout 2). Figure 5-15 Remove the scanner assembly (3 of 10) 2 4. Rotate the back side of the cover away from the product, and then slide the cover toward the front of the product to remove it. Figure 5-16 Remove the scanner assembly (4 of 10) 1 2 ENWW Scanner
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    5. Push the print-cartridge door button to release the scanner assembly, and then raise the assembly until it locks open. Figure 5-17 Remove the scanner assembly (5 of 10) 6. Disconnect
  • HP LaserJet M1120 | Service Manual - Page 79
    7. Grasp the tab on the gear-drive arm bracket and carefully flex it away from the scanner assembly to release the bracket. Figure 5-19 Remove the scanner assembly (7 of 10) 8. Push the bracket toward the right side of the product until its mounting tabs clear the holes in the scanner assembly.
  • HP LaserJet M1120 | Service Manual - Page 80
    the product base. CAUTION: Make sure that the scanner lid is supported so that it does not swing open when you remove the scanner assembly. NOTE: Do not lose the two scanner cushions in the scanner support-frame corners when moving the product base. See Scanner cushions on page 70
  • HP LaserJet M1120 | Service Manual - Page 81
    does not affect the validity of the procedures in this chapter. Print cartridge CAUTION: To prevent damage, do not expose the print cartridge to direct or bright light. Cover it with a piece of paper. 1. Push the print-cartridge-door release button and raise the scanner assembly until it locks open
  • HP LaserJet M1120 | Service Manual - Page 82
    Separation pad 1. Position the product with the rear side facing you. 2. Support the product and tip it forward. Remove two screws (callout 1). Figure 5-25 Remove the separation pad (1 of 2) 1 3. Remove the separation pad and frame. Figure 5-26
  • HP LaserJet M1120 | Service Manual - Page 83
    and locate the pickup roller. See Print cartridge on page 65. Figure 5-27 Remove the pickup roller (1 of 5) 2. Gently release the small, white tabs on each side of the pickup roller by pushing
  • HP LaserJet M1120 | Service Manual - Page 84
    each side of the pickup roller fit into corresponding slots on the pickup-roller mounting frame and prevent the roller from being incorrectly installed. Position the replacement pickup roller in the slots on the pickup-roller frame. Figure 5-30 Remove the pickup roller (4 of 5) 68 Chapter 5 Removal
  • HP LaserJet M1120 | Service Manual - Page 85
    5. Rotate the top of the pickup roller into position until the white tabs on each side of the roller snap into place. Figure 5-31 Remove the pickup roller (5 of 5) ENWW Product base 69
  • HP LaserJet M1120 | Service Manual - Page 86
    Scanner cushions 1. Open the print-cartridge door. 2. Place a scanner cushion in each well on the scanner support frame (callout 1). Use the eraser-end of a pencil or use an ink pen with the cap on to seat each cushion in its well. Figure 5-32 Installing the scanner cushions 1 70 Chapter 5 Removal
  • HP LaserJet M1120 | Service Manual - Page 87
    Media input tray 1. Open the media input tray lid. Figure 5-33 Remove the media input tray (1 of 3) 2. Slide the adjustable media guides to the center of the tray. Figure 5-34 Remove the media input tray (2 of 3) ENWW Product base 71
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    3. Depress the pickup-tray locking tabs to release the media input tray, and then pull it out and away from the product. Figure 5-35 Remove the media input tray (3 of 3) 72 Chapter 5 Removal and replacement ENWW
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    the black-sponge portion of the transfer roller. Skin oils deposited on the transfer roller might cause print-quality problems. 1. Open the print-cartridge door and remove the print cartridge. 2. Release the two small tabs on the transfer roller and then slide the roller to the right to release
  • HP LaserJet M1120 | Service Manual - Page 90
    Side covers NOTE: The procedure for removing the right-side and left-side covers is identical. The right-side cover is shown in the following procedure. 1. Remove one screw (callout 1). Callout 2 is the left-side cover screw. Figure 5-37 Remove the side covers (1 of 4) 2 1 2. Release the locking tab
  • HP LaserJet M1120 | Service Manual - Page 91
    3. Release the bottom tab (callout 3). Figure 5-39 Remove the side covers (3 of 4) 3 4. Slightly rotate the back side of the right cover away from the product, and then slide it toward the front of the product to release it. Figure 5-40 Remove the side covers (4 of 4) 2 1 ENWW Product base 75
  • HP LaserJet M1120 | Service Manual - Page 92
    2) on page 76, the left arm is disengaged). CAUTION: Be careful when releasing the swing arms. They can easily break. Figure 5-41 Remove the print-cartridge door (1 of 2) 3. Rotate the door toward the back of the product and then lift it up and off of the product. Figure 5-42 Remove the
  • HP LaserJet M1120 | Service Manual - Page 93
    Rear cover and fuser cover 1. Remove the right-side and left-side covers. See Side covers on page 74. 2. Remove one screw (callout 1). Figure 5-43 Remove the rear cover and fuser cover (1 of 3) 1 3. Release the two rear-cover locking tabs (callout 2). Rotate the bottom of the rear cover up and away
  • HP LaserJet M1120 | Service Manual - Page 94
    4. Rotate the bottom of the fuser cover away from the product, and then remove the fuser cover. Figure 5-45 Remove the rear cover and fuser cover (3 of 3) 78 Chapter 5 Removal and replacement ENWW
  • HP LaserJet M1120 | Service Manual - Page 95
    Front cover 1. Remove the right-side and left-side covers. See Side covers on page 74. 2. Release the lower left-side front-cover locking tab and slightly pry the lower-left corner of the front cover away from the product. Figure 5-46 Remove the front cover (1 of 4) 3. Release the lower right-side
  • HP LaserJet M1120 | Service Manual - Page 96
    4. Rotate the bottom of the front cover away from the product to release it. Figure 5-48 Remove the front cover (3 of 4) 5. Remove the front cover. Figure 5-49 Remove the front cover (4 of 4) 80 Chapter 5 Removal and replacement ENWW
  • HP LaserJet M1120 | Service Manual - Page 97
    fold the FFCs during the removal or reinstallation process. NOTE: The scanner assembly is shown removed in this procedure. If the scanner assembly is installed, there will be additional FFCs connected to the formatter. You do not need to remove the scanner assembly to remove the formatter. 3. Remove
  • HP LaserJet M1120 | Service Manual - Page 98
    Power supply 1. Remove the following assemblies: ● Right and left covers. See Side covers on page 74. ● Rear cover and fuser cover. See Rear cover and fuser cover on page 77. ● Front cover. See Front cover on page 79. ● Formatter. See Formatter on page 81. 2. Disconnect one spade connector (callout
  • HP LaserJet M1120 | Service Manual - Page 99
    supply (3 of 7) 6 6 5 6 6 5. Release the ground wire from the retainer (callout 7) on the product chassis. NOTE: You might need to slightly pry up on the scanner support frame to release the wire from the retainer. Figure 5-54 Remove the power supply (4 of 7) 7 ENWW Product base 83
  • HP LaserJet M1120 | Service Manual - Page 100
    6. Release the wire harness from the retainer (callout 8) on the power supply. Figure 5-55 Remove the power supply (5 of 7) 8 7. Unclip two clips (callout 9) and remove one plastic bracket (callout 10). CAUTION: The wire harness (callout 11) attached to the bracket is not captive. Do not lose this
  • HP LaserJet M1120 | Service Manual - Page 101
    8. Remove three screws (callout 12). Remove the power supply. Figure 5-57 Remove the power supply (7 of 7) 12 ENWW Product base 85
  • HP LaserJet M1120 | Service Manual - Page 102
    Scanner support frame 1. Remove the following assemblies: ● Scanner assembly. See Scanner assembly on page 60. ● Right and left cover. See Side covers on page 74. ● Print-cartridge door. See Print-cartridge door on page 76. ● Rear cover and fuser cover. See Rear cover and fuser cover on page 77. ●
  • HP LaserJet M1120 | Service Manual - Page 103
    until the retainer on the gear-drive arm aligns with the opening in the bracket, and remove the bracket. Figure 5-59 Remove the scanner support frame (2 of 5) 4. Remove one screw (callout 3) and the ferrite and bracket (callout 4). CAUTION: The ferrite is not captive in the bracket and can be
  • HP LaserJet M1120 | Service Manual - Page 104
    . Figure 5-61 Remove the scanner support frame (4 of 5) 6. If you are removing the scanner support frame to gain access to the fuser, remove two screws (callout 5) and the chassis reinforcement bracket (callout 6). Figure 5-62 Remove the scanner support frame (5 of 5) 6 5 88 Chapter 5 Removal
  • HP LaserJet M1120 | Service Manual - Page 105
    door. See Print-cartridge door on page 76. ● Rear cover and fuser cover. See Rear cover and fuser cover on page 77. ● Front cover. See Front cover on page 79. ● Scanner support frame. See Scanner support frame on page 86. 2. Remove three screws (callout 1) and one sheet-metal bracket (callout
  • HP LaserJet M1120 | Service Manual - Page 106
    left-side scannerassembly locking lever is in the down position. NOTE: When the shaft is reinstalled, make sure that the locking levers and the cartridge-door button (mounted to the shaft near the right-side locking lever) are correctly positioned. Verify that the locking-lever tension springs are
  • HP LaserJet M1120 | Service Manual - Page 107
    5. Lift the laser/scanner cover up and out of the product to remove it. NOTE: When this cover is reinstalled, make sure that the slots in the lower portion of the cover (callout 4; one shown) fit over the edge of the laser/scanner mounting shelf so that the cover is secure and correctly fits inside
  • HP LaserJet M1120 | Service Manual - Page 108
    7. Remove four screws (callout 6). NOTE: These four screws are longer than most of the screws used in the product. Do not get them mixed up with screws from previously removed components. Figure 5-68 Remove the laser/scanner assembly (6 of 7) 6 8. Carefully slide the laser/scanner assembly away from
  • HP LaserJet M1120 | Service Manual - Page 109
    door. See Print-cartridge door on page 76. ● Rear cover and fuser cover. See Rear cover and fuser cover on page 77. ● Front cover. See Front cover on page 79. ● Scanner support frame. See Scanner support frame on page 86. ● Laser/scanner assembly. See Laser/scanner assembly on page 89. 2. Remove
  • HP LaserJet M1120 | Service Manual - Page 110
    3. Carefully release two tabs (callout 3) and separate the main motor PCA from the mounting bracket. Figure 5-71 Remove the main motor (2 of 4) 3 4. Remove the main-motor wire harness from the retainers on the mounting bracket (callout 4). Remove the bracket (callout 5). Figure 5-72 Remove the main
  • HP LaserJet M1120 | Service Manual - Page 111
    5. Remove two screws (callout 6). Carefully slip the main-motor drive belt off of the motor shaft (callout 7), and then remove the main motor. Figure 5-73 Remove the main motor (4 of 4) 6 7 TIP: When the main motor is reinstalled, make sure that the wire harness is located toward the top of the
  • HP LaserJet M1120 | Service Manual - Page 112
    door. See Print-cartridge door on page 76. ● Rear cover and fuser cover. See Rear cover and fuser cover on page 77. ● Front cover. See Front cover on page 79. ● Formatter. See Formatter on page 81. ● Scanner support frame and chassis reinforcement plate. See Scanner support frame on page 86
  • HP LaserJet M1120 | Service Manual - Page 113
    3. Disconnect two wire-harness connectors (callout 3; J102, and J552) and remove the harnesses from the retainer (callout 4). NOTE: You might need to disconnect and remove the other wire harnesses to remove the required harness from the retainer. Figure 5-75 Remove the fuser (2 of 6) 4 3 4. Release
  • HP LaserJet M1120 | Service Manual - Page 114
    5. Release one tab (callout 7) and then remove the wire-harness retainer (callout 8). Figure 5-77 Remove the fuser (4 of 6) 8 7 6. Remove three screws (callout 9). Figure 5-78 Remove the fuser assembly (5 of 6) 9 98 Chapter 5 Removal and replacement ENWW
  • HP LaserJet M1120 | Service Manual - Page 115
    7. Lift up the right side of the fuser assembly to release it from the chassis, and then remove the fuser assembly. Figure 5-79 Remove the fuser assembly (6 of 6) NOTE: When replacing the fuser assembly, be sure to transfer the delivery-sensor PCA from the old fuser to the new one. ENWW Product
  • HP LaserJet M1120 | Service Manual - Page 116
    assembly on page 60. ● Transfer roller. See Transfer roller on page 73. ● Right and left cover. See Side covers on page 74. ● Print-cartridge door. See Print-cartridge door on page 76. ● Rear cover and fuser cover. See Rear cover and fuser cover on page 77. ● Front cover. See Front cover on
  • HP LaserJet M1120 | Service Manual - Page 117
    3. Disconnect two wire harnesses (callout 2; J551 and J556). Figure 5-81 Remove the paper-pickup assembly (2 of 4) 2 4. Remove six screws (callout 3). Figure 5-82 Remove the paper-pickup assembly (3 of 4) 3 ENWW Product base 101
  • HP LaserJet M1120 | Service Manual - Page 118
    5. Separate the assembly from the chassis, and then remove it. Figure 5-83 Remove the paper-pickup assembly (4 of 4) 102 Chapter 5 Removal and replacement ENWW
  • HP LaserJet M1120 | Service Manual - Page 119
    Drive-gear assembly and drive belt 1. Release one tab (callout 1). Rotate the paper-pickup drive-shaft locking clip until the clip retainers align with the holes in the chassis, and then remove the clip. Figure 5-84 Remove the drive-gear assembly and drive belt (1 of 4). 1 2. Carefully slip the
  • HP LaserJet M1120 | Service Manual - Page 120
    3. Remove the drive-gear assembly. CAUTION: Not all of the gears and springs are captive when you remove the drive-gear assembly. Make sure that you do not lose any of the springs or gears when the assembly is removed. Figure 5-86 Remove the drive-gear assembly and drive belt (3 of 4). 4. Remove one
  • HP LaserJet M1120 | Service Manual - Page 121
    6 Problem solve ● Problem-solving checklist ● Control-panel messages ● Clear jams ● Print problems ● Scan problems ● Copy problems ● Functional checks ● Service-mode functions ● Problem-solving tools ● Problem-solving diagrams ● Firmware updates ENWW 105
  • HP LaserJet M1120 | Service Manual - Page 122
    printing. Make sure that media that meets HP specifications. Clean the paper path. See Clean driver is selected. Select the proper driver. There is a port driver problem in Microsoft Windows. Uninstall and then reinstall the product software. Verify that you are using the correct installation
  • HP LaserJet M1120 | Service Manual - Page 123
    Verification step Possible problems Solutions Does the product scan to the computer? Initiate a scan from the basic desktop software at your computer. The cable is not connected correctly. Software is not installed correctly or an error occurred during software installation. Reconnect the cable
  • HP LaserJet M1120 | Service Manual - Page 124
    to guide the is receiving print data or scanning commands, control-panel messages too complex Press [OK] Printer jam clear paper path Settings panel, and then follow the control-panel instructions. See Clear jams on page 111. The the control panel instructions. See Clear jams on page 111.
  • HP LaserJet M1120 | Service Manual - Page 125
    on the power might fix the problem. If a critical error persists, the product might require service. Critical error message-tables Control the product to initialize. If the error persists, contact HP. See www.hp.com/support/LJM1120 or the support flyer that came in the product box. Turn off the
  • HP LaserJet M1120 | Service Manual - Page 126
    it. Plug the product directly into the wall socket. 3. Turn on the power and wait for the product to initialize. If the error persists, contact HP. See www.hp.com/support/LJM1120 or the support flyer that came in the product box. 110 Chapter 6 Problem solve ENWW
  • HP LaserJet M1120 | Service Manual - Page 127
    trays are loaded improperly or overfilled, or the media guides are not set properly. ● Media is added removed from the product during a print job. ● The cartridge door is opened during a print job. ● Too print media that is being used does not meet HP specifications. ● The media is damaged or has
  • HP LaserJet M1120 | Service Manual - Page 128
    ● In output areas ● In the print-cartridge area Find and remove the jam by using the instructions on the following pages. If the location of the jam is not obvious, first look inside the product. Loose toner might remain in the product after a jam. This problem typically resolves itself after a few
  • HP LaserJet M1120 | Service Manual - Page 129
    3. With both hands, grasp the side of the media that is most visible (this includes the middle), and carefully pull it free from the product. 4. Open tray 1 and remove the media stack. 5. With both hands, grasp the side of the jammed media that is most visible (this
  • HP LaserJet M1120 | Service Manual - Page 130
    6. Replace the print cartridge and close the print-cartridge door. 114 Chapter 6 Problem solve ENWW
  • HP LaserJet M1120 | Service Manual - Page 131
    by the warranty. With both hands, grasp the side of the jammed media that is most visible (this includes the middle), and carefully pull it free from the product. ENWW Clear jams 115
  • HP LaserJet M1120 | Service Manual - Page 132
    print cartridge, minimize its exposure to direct light. 2. With both hands, grasp the side of the jammed media that is most visible (this includes the middle), and carefully pull it free from the product. 3. Replace the print cartridge and close the print-cartridge door. 116 Chapter 6 Problem solve
  • HP LaserJet M1120 | Service Manual - Page 133
    that you are using. ● Verify that the media guides are properly adjusted. ● Check that the input input tray while the product is printing. ● Use only HP-recommended media types and sizes. ● Do not fan media . The print media type and the amount of toner used affect the output bin capacity. ● Check
  • HP LaserJet M1120 | Service Manual - Page 134
    following settings are available, depending on the printer driver that you are using: ● 600 dpi instructions, see the user guide. For Windows 2000: 1. In the Windows system tray, click Start, select Settings, and then click Printers. 2. Right-click the product icon. 3. Click Properties (in Windows
  • HP LaserJet M1120 | Service Manual - Page 135
    is with the hardware. Contact HP. See www.hp.com/support/LJM1120 or the support flyer that came in the product box. 4. Print a demo page at the control panel. If the page prints, the problem is with the printer driver. Try printing from another printer driver. 5. Try printing from a different
  • HP LaserJet M1120 | Service Manual - Page 136
    examples illustrate problems that printers. The paper lot is flawed. The manufacturing processes can cause some areas to reject toner. The print cartridge might be defective. Replace the print cartridge. See Print cartridge on page 25. If the error persists, contact HP. See www.hp.com/support
  • HP LaserJet M1120 | Service Manual - Page 137
    meets HP specifications. If toner smears appear on the leading edge of the paper, the media guides are dirty, or debris has accumulated in the print path. Clean the media guides and the paper path. See Clean the paper path on page 29. The fuser temperature might be too low. In the printer driver
  • HP LaserJet M1120 | Service Manual - Page 138
    might need service. Verify that the problem also occurs on the configuration page. If so, contact HP. See www.hp.com/support/LJM1120 or the support flyer that came in the product box. The product is not set to print on the type of media on which you want to print. In the printer driver, make sure
  • HP LaserJet M1120 | Service Manual - Page 139
    media guides are not too tight or too loose against the stack. See Install input devices on page 19. The media might not meet HP toner have scattered around the characters, the paper might have high resistivity. Use a different paper, such as high-quality paper that is intended for laser printers
  • HP LaserJet M1120 | Service Manual - Page 140
    you scan the original. The original is too small. The minimum size that the flatbed scanner supports is 25 x 25 mm (1 x 1 inch). The media size is incorrect. In Scan settings, make sure that the input media size is large enough for the document that you are scanning. . 124 Chapter 6 Problem
  • HP LaserJet M1120 | Service Manual - Page 141
    Problem The scan takes too long Cause Solution The resolution or color level is set too high. Change the resolution and color settings to the correct settings for your job. The software is set to scan in color. The system default is color, which takes longer to scan even when scanning a
  • HP LaserJet M1120 | Service Manual - Page 142
    a time, the separation pad might need to be replaced. Contact HP. See www.hp.com/support/LJM1120 or the support flyer that came in the product box. ● Use or make a carrier sheet to protect your originals. Solve scan-quality problems Problem Blank pages Too light or dark Unwanted spots Black dots
  • HP LaserJet M1120 | Service Manual - Page 143
    . NOTE: Verify that the media meets HP specifications. If the media meets HP specifications, recurring feed problems indicate the pickup roller or separation pad is worn. Image problems Problem Images are missing or faded. Cause The print-cartridge might be defective. The original might be
  • HP LaserJet M1120 | Service Manual - Page 144
    Problem Cause Unwanted lines or dots appear on The flatbed scanner might be dirty. the copy. The photosensitive drum inside the print cartridge might have been scratched. Solution Clean the flatbed scanner. See Clean the flatbed scanner glass on page 28. Install a new HP print cartridge. See
  • HP LaserJet M1120 | Service Manual - Page 145
    , press OK to print the job. ● Verify that the product is not in manual feed mode and print your job again. The pickup roller might be dirty or damaged. Contact HP. See www.hp.com/support/ LJM1120 or the support flyer that came in the product box. The paper-length adjustment control in tray
  • HP LaserJet M1120 | Service Manual - Page 146
    loaded incorrectly. The sealing tape might not have been removed from the print cartridge. The original might have been loaded incorrectly. The media might not meet HP specifications. Load media in the product. See Install input devices on page 19 for more information. On the flatbed scanner, place
  • HP LaserJet M1120 | Service Manual - Page 147
    have been used. 1. Open the print-cartridge door. 2. Remove the print cartridge. 3. Mark the drive gear on the cartridge with a felt-tipped marker. Note the position of the mark. 4. Install the print cartridge and close the print-cartridge door. The startup sequence should rotate the drum enough
  • HP LaserJet M1120 | Service Manual - Page 148
    failure as a transfer or fusing problem. Perform other checks If no image appears on the photosensitive drum, perform these checks: 1. Make sure that you removed the entire length of the sealing tape from the print cartridge before you installed the cartridge. 2. Perform a drum-rotation functional
  • HP LaserJet M1120 | Service Manual - Page 149
    between the heating element and a soft pressure roller to fuse toner to the media. 1. Unplug the product for at least ten on the print cartridge to provide the necessary voltages for the electrophotographic processes. Check the print-cartridge contacts Remove the print cartridge and visually inspect
  • HP LaserJet M1120 | Service Manual - Page 150
    connection points (left side) 2 3 Check the high-voltage connector assembly Visually inspect the cartridge connection points inside the product to make sure that they are not dirty or corroded. If the pins are dirty, clean them by using isopropyl alcohol only. 134 Chapter 6 Problem solve ENWW
  • HP LaserJet M1120 | Service Manual - Page 151
    and then release both the left arrow button and the OK button. 3. Press the OK button. 4. Use the arrow buttons to select the desired secondary-service option, and then press the OK button. 5. Use the arrow buttons to select the desired submenu option, and then press OK . 6. After making the
  • HP LaserJet M1120 | Service Manual - Page 152
    Menu item Display test Button test Show FW Version High Speed USB Scan Calibration Submenu On (default) Off Mono Red Green Blue Description Use when using the USB port, change this setting to Off. Use the Scan Calibration sub-menu to calibrate the product scanner. 136 Chapter 6 Problem solve ENWW
  • HP LaserJet M1120 | Service Manual - Page 153
    memory. These pages and reports help diagnose and solve problems with the product. NOTE: If the product language was not correctly set during installation, you can set the language manually so the information pages print in one of the supported languages. Change the language by using the System
  • HP LaserJet M1120 | Service Manual - Page 154
    the control-panel Service menu to solve product problems. In the table below, an asterisk (*) denotes the default setting. Service menu item Restore . The archive print feature produces output that is less susceptible to toner smearing and dusting. Use archive print to create documents that you
  • HP LaserJet M1120 | Service Manual - Page 155
    Turn on archive print 1. On the product control panel, press Setup. 2. Use the arrow buttons to select Service, and then press OK. 3. Use the arrow buttons to select Archive print, On, or Off, and then press OK. ENWW Problem-solving tools 139
  • HP LaserJet M1120 | Service Manual - Page 156
    . 29.1 mm (1.14 in) Developing cylinder Replace the print cartridge. 39.3 mm (1.55 in) Transfer roller Replace the transfer roller. 56.2 mm (2.21 in) Pressure roller Replace the fuser. 56.5 mm (2.22 in) Fuser film (fuser sleeve) Replace the fuser. 140 Chapter 6 Problem solve ENWW
  • HP LaserJet M1120 | Service Manual - Page 157
    Interface ports All models have a Hi-Speed USB 2.0 port. The HP LaserJet M1120n also has a 10/100 Base-T (RJ-45) network port. 1 2 1 Hi-Speed USB 2.0 port 2 Network port (HP LaserJet M1120n only) ENWW Problem-solving diagrams 141
  • HP LaserJet M1120 | Service Manual - Page 158
    Formatter connectors Figure 6-3 Formatter connectors J12 J10 J17 J8 J18 J14 Table 6-2 Formatter connectors Item Description J8 High-speed USB 2.0 port J10 Control panel J12 Scanner J14 +24V (from engine) J17 ECU PCA J18 Network port 142 Chapter 6 Problem solve ENWW
  • HP LaserJet M1120 | Service Manual - Page 159
    ) J552 Media-sensor PCA (fuser delivery sensor PS701 and media width sensor PS702) J562 Pickup solenoid J571 Motor-drive PCA J581 TAGIN/TAGOUT PCA ENWW Problem-solving diagrams 143
  • HP LaserJet M1120 | Service Manual - Page 160
    Solenoid and motor Figure 6-5 Solenoid and motor 1 2 Table 6-4 Solenoid and motor Item Description 1 Pickup solenoid 2 Main motor 144 Chapter 6 Problem solve ENWW
  • HP LaserJet M1120 | Service Manual - Page 161
    Rollers Figure 6-6 Rollers 1 2 Table 6-5 Rollers Item Description 1 Transfer roller (fastened to the rear door) 2 Pickup roller ENWW Problem-solving diagrams 145
  • HP LaserJet M1120 | Service Manual - Page 162
    Sensors Figure 6-7 Sensors PS702 PS701 PS751 Table 6-6 Sensors Item Description PS701 Fuser-delivery sensor PS702 Media-width sensor PS751 Top-of-page sensor 146 Chapter 6 Problem solve ENWW
  • HP LaserJet M1120 | Service Manual - Page 163
    Major components Figure 6-8 Major components 1 2 4 31 Table 6-7 Major components Item Description 1 Fuser assembly 2 Laser/scanner assembly 3 Paper-pickup assembly 4 Separation-pad assembly ENWW Problem-solving diagrams 147
  • HP LaserJet M1120 | Service Manual - Page 164
    PCAs (base unit) Figure 6-9 PCAs (base unit) 1 2 Table 6-8 PCAs (base unit) Item Description 1 Formatter PCA 2 Engine-controller PCA (ECU) 148 Chapter 6 Problem solve ENWW
  • HP LaserJet M1120 | Service Manual - Page 165
    Problem-solving diagrams 149 ENWW 11 13 15 17 Formatter 12 Fuser heater Fuser sleeve unit Thermistor 1 1 12 TH1 2 H1 2 1 J1011 TP1 Thermal fuse 2 FSRTH GND
  • HP LaserJet M1120 | Service Manual - Page 166
    Firmware updates Firmware updates and installation instructions for this product are available at www.hp.com/support/ LJM1120. Click Downloads and drivers, click the operating system, and then select the firmware download for the product. 150 Chapter 6 Problem solve ENWW
  • HP LaserJet M1120 | Service Manual - Page 167
    ● Supplies and hinge tool ● Cable and interface accessories ● Whole-unit replacement ● Control-panel overlays ● Supplementry documentation and support ● Parts lists and diagrams ● Scanner assemblies ● Assemblies ● External covers and panels ● Internal components (1 of 3) ● Internal components (2 of
  • HP LaserJet M1120 | Service Manual - Page 168
    /parts.com. ● To order supplies and paper, go to www.hp.com/buy/suresupply.com. Supplies and hinge tool Product name Replacement print cartridge Scanner hinge tool Description Part number Average yield for the print cartridge is CB436A (new) approximately 2,000 pages. Actual yield depends on
  • HP LaserJet M1120 | Service Manual - Page 169
    - Hong Kong SAR-English/Traditional Chinese CC537-67907 ABG - Australia-English CC537-67909 A2K - Philippines-English CC537-67910 ACJ - India-English CC537-67911 AK3 - Indonesia-Indonesia localizaton CC537-67912 UUD - Vietnam-Vietnamese localization CC537-67913 ARR - Asia Pacific (Euro
  • HP LaserJet M1120 | Service Manual - Page 170
    Table 7-1 Whole-unit replacement, product bundle CC537A (continued) Country/region Localized configuration Europe, Middle East, and Africa ABD - Germany-German ABF - France-French ABH - Netherlands-Dutch ABZ - Italy-Italian ABE - Spain-Spanish localization BFY - Spain-Catalan localization
  • HP LaserJet M1120 | Service Manual - Page 171
    - Hong Kong SAR-English/Traditional Chinese CC459-67906 ABG - Australia-English CC459-67907 A2K - Philippines-English CC459-67908 ACJ - India-English CC459-67909 AK3 - Indonesia-Indonesia localizaton CC459-67910 UUD - Vietnam-Vietnamese localization CC459-67911 ARR - Asia Pacific (Euro
  • HP LaserJet M1120 | Service Manual - Page 172
    Table 7-2 Whole-unit replacement, product bundle CC459A (continued) Country/region Localized configuration Europe, Middle East, and Africa ABD - Germany-German ABF - France-French ABH - Netherlands-Dutch ABZ - Italy-Italian ABE - Spain-Spanish localization BFY - Spain-Catalan localization
  • HP LaserJet M1120 | Service Manual - Page 173
    Control-panel overlays Table 7-3 Control-panel overlays, HP LaserJet M1120 Item Language Control-panel overlay English (EN) Control-panel overlay Spanish (ES) Control-panel overlay Portuguese (PT) Control-panel overlay German (DE) Control-panel overlay
  • HP LaserJet M1120 | Service Manual - Page 174
    Table 7-3 Control-panel overlays, HP LaserJet M1120 (continued) Item Language Control-panel overlay Ukranian (UK) 00037 CB537-00038 CB537-00039 CB537-00040 Table 7-4 Control-panel overlays, HP LaserJet M1120n Item Language Control-panel overlay English (EN) Control-panel overlay Spanish
  • HP LaserJet M1120 | Service Manual - Page 175
    Table 7-4 Control-panel overlays, HP LaserJet M1120n (continued) Item Language Control-panel overlay Romanian (RO) Control-panel overlay Croation (HR) Control-panel overlay Slovenian (SL) Control-panel overlay Indonesian (ID) Control-panel
  • HP LaserJet M1120 | Service Manual - Page 176
    Supplementry documentation and support Table 7-5 Documentation (print on demand) Description Languages Part number Service manual (this manual) English only CB537-90945 Getting Started guides English, Spanish, Portuguese, French CB537-90901 English, Spanish, Portuguese, Catalan, Dutch,
  • HP LaserJet M1120 | Service Manual - Page 177
    Table 7-5 Documentation (print on demand) (continued) Description Languages User guides, continued Danish Dutch Estonian Finnish French German Greek Hebrew Hungarian Indonesian CB537-90937 CB537-90938 CB537-90940 CB537-90941 CB537-90942 ENWW Supplementry documentation and support 161
  • HP LaserJet M1120 | Service Manual - Page 178
    that is listed in the description column to ensure that the part number selected is for the correct product 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 board plus
  • HP LaserJet M1120 | Service Manual - Page 179
    Types of screws Illustration Description Screw, RS Screw, D Size M3X6 M3X8 M3X10 M3X6 Screw w/washer Screw tapping M3X6 M3X8 M4X10 M3X9 12 mm Part number XB2-8300-609CN XA9-1504-000CN XA9-1501-000CN XA9-1670-000CN Use Used to secure plastic to metal Used to secure plastic to metal XB2-7300
  • HP LaserJet M1120 | Service Manual - Page 180
    Scanner assemblies Figure 7-1 Scanner assemblies 1 2 4 3 164 Chapter 7 Parts ENWW
  • HP LaserJet M1120 | Service Manual - Page 181
    1 2 Control-panel assembly, LJm1120 (Western) CB537-60109 1 2 Control-panel assembly, LJm1120 (Asian) CB537-60110 1 3 SSA PKG FGI ASSY LJm1120 (scanner flatbed assembly) CB537-67901 1 4 LJm1005 HP Jewel 7121-8285 1 ENWW Scanner assemblies 165
  • HP LaserJet M1120 | Service Manual - Page 182
    Assemblies Figure 7-2 Assemblies 7 1 2 3 4 5 6 166 Chapter 7 Parts ENWW
  • HP LaserJet M1120 | Service Manual - Page 183
    Paper-delivery tray assembly 6 Paper-pickup tray assembly 7 Formatter, standard (HP LaserJet M1120) 7 Formatter, Asian (HP LaserJet M1120) 7 Formatter, standard (HP LaserJet M1120n) 7 Formatter, Asian (HP LaserJet M1120n) Part number Qty See Control-panel overlays 1 on page 157. RU6
  • HP LaserJet M1120 | Service Manual - Page 184
    External covers and panels Figure 7-3 External covers and panels 1 2 4 7 3 6 168 Chapter 7 Parts 5 ENWW
  • HP LaserJet M1120 | Service Manual - Page 185
    Table 7-8 External covers and panels Ref Description 1 Cover, rear 2 Cover, cartridge 3 Cushion, scanner 4 Cover, right 5 Cover, front 6 Cover, left 7 Cover, top Part number Qty RC2-2971-000CN 1 RC2-2960-000CN 1 RC1-2476-000CN 2 RL1-1736-000CN 1
  • HP LaserJet M1120 | Service Manual - Page 186
    Internal components (1 of 3) Figure 7-4 Internal components (1 of 3) 1 3 2 170 Chapter 7 Parts ENWW
  • HP LaserJet M1120 | Service Manual - Page 187
    Table 7-9 Internal components (1 of 3) Ref Description 1 Fuser assembly, 110v-220v 1 Fuser assembly, 220v-240v 2 Engine controller PCA (ECU), 110v-220v 2 Engine controller PCA (ECU), 220v-240v 3 Link, coupling Part number Qty RM1-4721-000CN 1 RM1-4726-000CN 1 RM1-4932-000CN 1
  • HP LaserJet M1120 | Service Manual - Page 188
    Internal components (2 of 3) Figure 7-5 Internal components (2 of 3) 3 2 6 1 5 4 172 Chapter 7 Parts ENWW
  • HP LaserJet M1120 | Service Manual - Page 189
    Table 7-10 Internal components (2 of 3) Ref Description 1 Paper-pickup assembly 2 Roller, transfer 3 Roller, pickup 4 Separation-pad assembly 5 Latch, left 6 Latch, right Part number Qty RM1-4727-000CN 1 RM1-4234-000CN 1 RL1-1497-000CN 1 RM1-4207-000CN 1 RC1-2498-000CN 1
  • HP LaserJet M1120 | Service Manual - Page 190
    Internal components (3 of 3) Figure 7-6 Internal components (3 of 3) 2 1 4 5 3 174 Chapter 7 Parts ENWW
  • HP LaserJet M1120 | Service Manual - Page 191
    Table 7-11 Internal components (3 of 3) Ref Description 1 Laser/scanner assembly 2 Motor-controller PCA 3 Tray guide, left 4 Tray guide, right 5 Motor, 24V DC Part number Qty RM1-4724-005CN 1 RM1-4935-000CN 1 RC2-2979-000CN 1 RC2-2980-000CN 1 RM1-4196-000CN 1 ENWW Internal
  • HP LaserJet M1120 | Service Manual - Page 192
    Cover, cartridge Cover, front Cover, left Cover, rear Cover, right Cover, top Cushion, scanner Engine controller PCA (ECU), 110v-220v Engine controller PCA (ECU), 220v-240v Flatbed lid Formatter, Asian (HP LaserJet M1120) Formatter, Asian (HP LaserJet M1120n) Formatter, standard (HP LaserJet M1120
  • HP LaserJet M1120 | Service Manual - Page 193
    Alphabetical parts list (continued) Description Link, coupling LJm1005 HP Jewel Motor, 24V DC Motor-controller PCA Paper- right Separation-pad assembly SSA PKG FGI ASSY LJm1120 (scanner flatbed assembly) Tray guide, left Tray guide, right Part number RC2-2965-000CN 7121-8285 RM1-4196-000CN RM1-4935-
  • HP LaserJet M1120 | Service Manual - Page 194
    (HP LaserJet M1120n) Formatter, Asian (HP LaserJet M1120) Formatter, Asian (HP LaserJet M1120n) Cushion, scanner RC1-2498-000CN Latch, left RC1-2499-000CN Latch, right RC2-2960-000CN Cover, cartridge RC2-2965-000CN Link, coupling RC2-2971-000CN Cover, rear RC2-2979-000CN Tray guide
  • HP LaserJet M1120 | Service Manual - Page 195
    Table 7-13 Numerical parts list (continued) Part number Description RM1-3953-000CN Scanner-link assembly, left RM1-3954-000CN Scanner-link assembly, right RM1-4196-000CN Motor, 24V DC RM1-4207-000CN Separation-pad assembly RM1-4234-000CN Roller, transfer RM1-4721-000CN Fuser assembly,
  • HP LaserJet M1120 | Service Manual - Page 196
    180 Chapter 7 Parts ENWW
  • HP LaserJet M1120 | Service Manual - Page 197
    A Service and support Hewlett-Packard limited warranty statement HP PRODUCT HP LaserJet M1120 and M1120n DURATION OF LIMITED WARRANTY One-year limited warranty HP warrants to you, the end-user customer, that HP hardware and accessories will be free from defects in materials and workmanship after
  • HP LaserJet M1120 | Service Manual - Page 198
    documentation in the provided shipping material. Failure to return the defective part may result in HP billing you for the replacement. With a customer self repair, HP will pay all shipping and part return costs and determine the courier/carrier to be used. 182 Appendix A Service and support ENWW
  • HP LaserJet M1120 | Service Manual - Page 199
    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 replace products that prove to be defective or refund
  • HP LaserJet M1120 | Service Manual - Page 200
    , date of purchase, and problem description ready. Get 24-hour Internet support www.hp.com/support/LJM1120 Get support for products used with a Macintosh computer www.hp.com/go/macosx Download software utilities, drivers, and electronic information www.hp.com/go/LJM1120_software Order supplies
  • HP LaserJet M1120 | Service Manual - Page 201
    B Specifications This section contains the following information about the product: ● Physical specifications ● Electrical specifications ● Power consumption ● Environmental specifications ● Acoustic emissions ENWW 185
  • HP LaserJet M1120 | Service Manual - Page 202
    (average, in watts)1 Product model Printing2 Copying2 Ready/Sleep3 Off HP LaserJet M1120 420 W 420 W 5 W
  • HP LaserJet M1120 | Service Manual - Page 203
    Declared per ISO 92961 Printing (19 ppm) LpAm = 53 dB(A) Ready Inaudible 1 Values are based on preliminary data. See www.hp.com/support/LJM1120 for current information. 2 Configuration tested: HP LaserJet M1120 printing simplex using A4 paper at 19 ppm. ENWW Environmental specifications 187
  • HP LaserJet M1120 | Service Manual - Page 204
    188 Appendix B Specifications ENWW
  • HP LaserJet M1120 | Service Manual - Page 205
    C Regulatory information This section contains the following regulatory information: ● FCC compliance ● Environmental product stewardship program ● Declaration of conformity ● Safety statements ENWW 189
  • HP LaserJet M1120 | Service Manual - Page 206
    Sheet. Qualified products are also listed at: http://www.hp.com/hpinfo/globalcitizenship/environment/productdesign/ecolabels.html Toner consumption EconoMode uses less toner, which might extend the life of the print cartridge. Paper use This product's duplex feature (two-sided printing
  • HP LaserJet M1120 | Service Manual - Page 207
    The enclosed label in the HP LaserJet toner cartridge box is for the return and recycling of one or more HP LaserJet print cartridges after use. Please follow the applicable instructions below. Multiple returns (two to eight cartridges) 1. Package each HP LaserJet print cartridge in its original box
  • HP LaserJet M1120 | Service Manual - Page 208
    HP LaserJet printing supplies. Paper This product is capable of using recycled papers when the paper meets the guidelines outlined in the HP LaserJet Printer Family Print Media Guide waste disposal service or the toner) can be obtained by contacting the HP Web site at www.hp.com/go/msds or www.hp
  • HP LaserJet M1120 | Service Manual - Page 209
    ● HP's end-of-life product return and recycling program ● Material Safety Data Sheets Visit www.hp.com/go/environment or www.hp.com/hpinfo/globalcitizenship/environment/index.html. ENWW Environmental product stewardship program 193
  • HP LaserJet M1120 | Service Manual - Page 210
    the product Product Name: HP LaserJet M1120 Series Regulatory Model Number2) Product Options: Print Cartridges: BOISB-0604-03 ALL For regulatory topics only: European Contact: Your Local Hewlett-Packard Sales and Service Office or Hewlett-Packard GmbH, Department HQ-TRE / Standards Europe,,
  • HP LaserJet M1120 | Service Manual - Page 211
    1" laser product under the U.S. Department of Health and Human Services (DHHS) Radiation Performance Standard according to the Radiation Control for adjustments, or performing procedures other than those specified in this guide may result in exposure to hazardous radiation. Canadian DOC regulations
  • HP LaserJet M1120 | Service Manual - Page 212
    sätt än i bruksanvisning specificerats, kan användaren utsättas för osynlig laserstrålning, som överskrider gränsen för laserklass 1. HUOLTO HP LaserJet M1120, M1120n - kirjoittimen sisällä ei ole käyttäjän huollettavissa olevia kohteita. Laitteen saa avata ja huoltaa ainoastaan sen huoltamiseen
  • HP LaserJet M1120 | Service Manual - Page 213
    O SJ/T11363-2006 X SJ/T11363-2006 NOTE ENWW Safety statements 197
  • HP LaserJet M1120 | Service Manual - Page 214
    198 Appendix C Regulatory information ENWW
  • HP LaserJet M1120 | Service Manual - Page 215
    76 cartridge-door release, locating 5 cartridges drum rotation test 131 high-voltage contacts, cleaning 133 HP fraud hotline 27 recycling 191 remove 65 replacing 25 status, checking 24 storing 24 warranty 183 caution toner on clothing 26 characters, troubleshooting 122 checklists after service 50
  • HP LaserJet M1120 | Service Manual - Page 216
    160 door, cartridge remove 76 dots per inch (dpi) print settings 118 specifications 4 dots, troubleshooting copies 128 dpi (dots per inch) print settings 118 specifications 4 drivers operating systems supported 7 drum photosensitive 38 drum rotation test 131 E easy software installation 7 ECU
  • HP LaserJet M1120 | Service Manual - Page 217
    assemblies, remove 53 loading media priority input tray 19 locating internal components 38 loose toner, troubleshooting 121 M Macintosh drivers supported 7 Intel Core Processor 7 PPC 7 support 184 supported operating systems 7 system requirements 17 uninstall software 11 main input tray remove 71
  • HP LaserJet M1120 | Service Manual - Page 218
    types included 4 post-service tests 51 power high-voltage cartridges door release, locating 5 drum rotation test 131 high-voltage contacts 133 HP fraud hotline 27 recycling 191 remove 65 replacing 25 status, checking 24 storing 24 warranty 183 print defects, troubleshooting 119 print media supported
  • HP LaserJet M1120 | Service Manual - Page 219
    , locating 38 transfer, remove 73 S safety statements 195, 196 scan-image quality, troubleshooting 124 scanner cushions, installing 70 glass, cleaning 28 lid, remove 56 operations 36 remove 60 replace 52 support frame, remove 86 support-frame spring, remove 53 scanner assemblies part numbers 164
  • HP LaserJet M1120 | Service Manual - Page 220
    122 slow speed, troubleshooting scanning 125 smeared toner, troubleshooting 121 software advanced installation 8 components 7 easy installation 7 embedded Web server 9, 10, 30 HP Web Jetadmin 30 supported operating systems 7 system requirements 17 uninstall 11 Windows 9 solenoid 144 specifications
  • HP LaserJet M1120 | Service Manual - Page 221
    print cartridge 183 product 181 transfer unit and fuser 183 wavy paper, troubleshooting 122 Web sites customer support 184 documentation 2 Macintosh customer support 184 Material Safety Data Sheet (MSDS) 192 weight 186 white or faded stripes, troubleshooting 127 Windows drivers supported 7 software
  • HP LaserJet M1120 | Service Manual - Page 222
    206 Index ENWW
  • HP LaserJet M1120 | Service Manual - Page 223
  • HP LaserJet M1120 | Service Manual - Page 224
    © 2008 Hewlett-Packard Development Company, L.P. www.hp.com *CB537-90945* *CB537-90945* CB537-90945
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HP LaserJet M1120 MFP Series
Service Manual