HP 4300 Service Manual
HP 4300 - LaserJet B/W Laser Printer Manual
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HP 4300 manual content summary:
- HP 4300 | Service Manual - Page 1
service hp LaserJet 4200 4200n 4200tn 4200dtn 4200dtns 4200dtnsl hp LaserJet 4300 4300n 4300tn 4300dtn 4300dtns 4300dtnsl - HP 4300 | Service Manual - Page 2
- HP 4300 | Service Manual - Page 3
hp LaserJet 4200/4300 Series Printers Service - HP 4300 | Service Manual - Page 4
® is a U.S. registered service mark of the United States digital device, pursuant to Part 15 of the FCC in accordance with the instructions, it may cause try to correct the interference by one or more of the following measures: printer that are not expressly approved by HP could void the user - HP 4300 | Service Manual - Page 5
DOC regulations 26 2 Service approach Service approach 28 Parts and supplies 28 Ordering information 28 Related documentation and software 28 Support 28 Print-cartridge information 31 Hewlett-Packard limited warranty statement 32 Limited warranty for toner cartridge life 33 Q2431-90912 - HP 4300 | Service Manual - Page 6
maintenance Cleaning the printer and accessories 54 Cleaning the fuser 55 Running the cleaning page manually 56 Running the cleaning page automatically 57 Cleaning spilled toner 57 Performing preventative maintenance 58 Resetting the maintenance-kit counter 58 Expected life of components 59 - HP 4300 | Service Manual - Page 7
Main cooling fan (left side 168 Cooling fan (right side; HP LaserJet 4300 series printer only 170 Laser/scanner assembly 173 Print-cartridge motor (HP LaserJet 4300 series printer only 175 Main motor 177 Tray 2 lifter-drive assembly 179 DC controller PCA 181 Q2431-90912 Table of contents v - HP 4300 | Service Manual - Page 8
tools 239 Information pages 239 Embedded Web server 243 Gaining access to the embedded Web server 243 Printer Status and Alerts software 245 Control-panel menus 247 Using control-panel menus 247 Resets submenu 247 Diagnostics menu 248 Service menu (service PIN codes 249 Printer resets and - HP 4300 | Service Manual - Page 9
Repetitive defects troubleshooting 325 Troubleshooting the stacker and the stapler/stacker 326 Overview 326 Initial checks 326 Jam errors 327 Paper transport errors 330 Malfunction errors 330 Component errors 331 Printer component locations 332 Main printer parts 332 Printer switches and - HP 4300 | Service Manual - Page 10
viii Table of contents Q2431-90912 - HP 4300 | Service Manual - Page 11
-90912 Figure 1. Printer physical dimensions 6 Figure 2. Sample cleaning page 56 Figure 3. Replacing the stapler unit (1 of 2 60 Figure 4. Replacing the stapler unit (2 of 2 61 Figure 5. Loading staples in the staple cartridge (stapler/stacker only 62 Figure 6. DC controller PCA block diagram - HP 4300 | Service Manual - Page 12
113. Cooling fan (HP LaserJet 4300 series only; 2 of 5 170 Figure 114. Cooling fan (HP LaserJet 4300 series only; 3 of 5 171 Figure 115. Cooling fan (HP LaserJet 4300 series only; 4 of 5 171 Figure 116. Cooling fan (HP LaserJet 4300 series only; 5 of 5 172 Figure 117. Laser/scanner (1 of 4 173 - HP 4300 | Service Manual - Page 13
scanner (2 of 4 173 Figure 119. Laser/scanner (3 of 4 174 Figure 120. Laser/scanner (4 of 4 174 Figure 121. Print-cartridge motor (HP LaserJet 4300 series only; 1 of 2 175 Figure 122. Print-cartridge motor (HP Laserjet 4300 series 206 Figure 168. 500-sheet feeder control PCA 207 Figure 169. 500- - HP 4300 | Service Manual - Page 14
wiring diagram 354 Figure 232. Stapler/stacker accessory wiring diagram 355 Figure 233. DC controller connectors diagram 356 Figure 234. HP LaserJet 4200 general timing diagram 357 Figure 235. HP LaserJet 4300 general timing diagram 358 Figure 236. Stapler/stacker timing diagram 359 Figure 237 - HP 4300 | Service Manual - Page 15
246. Tray 2 lifter driver assembly 381 Figure 247. Paper pickup assembly 382 Figure 248. Paper-feed assembly 383 Figure 249. Registration assembly 384 Figure 250. Tray 1 assembly 385 Figure 251. Output delivery assembly 386 Figure 252. Transfer assembly 387 Figure 253. Fuser 388 Figure 254 - HP 4300 | Service Manual - Page 16
xiv List of figures Q2431-90912 - HP 4300 | Service Manual - Page 17
46 Table 24. System setup submenu 49 Table 25. Stapler stacker submenu 51 Table 26. I/O submenu 52 Table 27. Cleaning the printer 55 Table 28. Maintenance kit part numbers 58 Table 29. Component life expectancies and part numbers 59 Table 30. Basic printer operating sequence 67 Table 31 - HP 4300 | Service Manual - Page 18
error troubleshooting 330 Table 80. Component error troubleshooting 331 Table 81. Technical support websites 362 Table 82. Paper-handling accessories 364 Table 83. Memory, fonts, and mass storage 365 Table 84. Cables and interfaces 365 Table 85. Printer maintenance kit and exchange parts - HP 4300 | Service Manual - Page 19
Table 115. Stacker and stapler/stacker 403 Table 116. Stacker and stapler/stacker 404 Table 117. Alphabetical pars list 405 Table 118. Numerical pars list 409 Q2431-90912 List of tables xvii - HP 4300 | Service Manual - Page 20
xviii List of tables Q2431-90912 - HP 4300 | Service Manual - Page 21
Printer specifications 5 Physical dimensions 6 Printer weights (without print cartridge 7 Environmental specifications 7 Paper specifications 9 Supported sizes and weights of media 10 Supported to avoid 19 Safety information 20 Print cartridge and toner safety 20 Handling and storage 20 - HP 4300 | Service Manual - Page 22
program 24 Protecting the environment 24 Energy consumption 24 Toner consumption 24 Paper use 24 Plastics 24 HP LaserJet printing supplies 24 Paper 24 Material restrictions 25 For more information 25 HP Printing Supplies Returns and Recycling program information . . 25 U.S. returns - HP 4300 | Service Manual - Page 23
configurations Base model The HP LaserJet 4200/4300 series printer is available in a total of 12 models. Table 1. Product configurations HP LaserJet 4200 series HP LaserJet 4300 series q Q2425A q 48 MB RAM, expandable to 416 MB q one 100-sheet tray and one 500-sheet tray q Q2431A q 64 MB - HP 4300 | Service Manual - Page 24
are listed on an identification label located under the top cover on the right side of the printer. The model number is alphanumeric, such as Q2431A for the HP LaserJet 4200/4300 products. The serial number contains information about the country/region of origin, the revision level, the production - HP 4300 | Service Manual - Page 25
, refrigerators, or other major appliances. See table 6 on page 8 for temperature and humidity ranges. q Install away from direct sunlight, open flames, or ammonia fumes. If the printer is placed near a window, make sure the window has a curtain or blind to block direct sunlight. q Install - HP 4300 | Service Manual - Page 26
) HP LaserJet 4200/4200n/4300/4300n (top cover open) 547 mm (21.5 inches) 1,045 mm (41.1 inches) HP LaserJet 4200tn/4200dtn/ 4300tn/4300dtn (top cover open) 670 mm (26.4 inches) HP LaserJet 4200dtns/4200dtnsL/ 4300dtns/4300dtnsL 740 mm (29.1 inches) 1,045 mm (41.1 inches) Figure 1. Printer - HP 4300 | Service Manual - Page 27
cartridge) Table 2. Printer weights HP LaserJet 4200/4200n printers HP LaserJet 4200tn printer HP LaserJet 4200dtn printer HP LaserJet 4200dtns printer HP LaserJet 4200dtnsL printer HP LaserJet 4300/4300n printers HP LaserJet 4300tn printer HP LaserJet 4300dtn printer HP LaserJet 4300dtns printer - HP 4300 | Service Manual - Page 28
per ISO 9296 Printing, 35 ppm (HP LaserJet 4200 series) Printing, 45 ppm (HP LaserJet 4300 series) PowerSave LpAm= 54 dB (A) LpAm= 56 dB (A) LpAm= 27 dB (A) Values are subject to change. See http://www.hp.com/support/lj4200 or http://www.hp.com/support/lj4300 for current information. Table - HP 4300 | Service Manual - Page 29
here and in the HP LaserJet Printer Family Print Media Guide. Go to http://www.hp.com/support/ljpaperguide for more information. Always test paper before purchasing a large quantity. Using media that is outside HP specifications can cause problems for the printer, requiring repair. This repair - HP 4300 | Service Manual - Page 30
Note Supported sizes and weights of media The printer always prints at half speed from tray 1. The printer also Envelope DL ISO Envelope C5 ISO Envelope B5 ISO Envelope Monarch #7-3/4 Transparencies (for monochrome LaserJet printers only) Maximum: 216 by 356 mm (8.5 by 14 inches) 105 by 241 mm - HP 4300 | Service Manual - Page 31
to 0.229 mm (0.005 to 0.009 inch) 50 labels Maximum: 216 by 356 mm (8.5 by 14 inches) 1. The printer supports a wide range of sizes. Check the printer software for supported sizes. 2. Capacity can vary depending on paper weight and thickness, as well as environmental conditions. 3. All sizes can - HP 4300 | Service Manual - Page 32
229 mm (6.4 by 9.0 inches) B5 ISO 176 by 250 mm (6.9 by 9.8 inches) Weight 75 to 105 g/m2 (20 to 28 lb) Capacity 75 envelopes 12 Printer description Q2431-90912 - HP 4300 | Service Manual - Page 33
(5.8 by 8.3 inches) Maximum: 216 by 356 mm (8.5 by 14 inches) Stapler part of stapler/stacker only Letter A4 216 by 279 mm (8.5 by 11 inches) 210 (8.5 by 14 inches) 1. The printer supports a wide range of sizes. Check the printer software for supported sizes. 2. Capacity can vary depending on - HP 4300 | Service Manual - Page 34
fuser mode. See "Print Quality submenu" on page 46. Note Do not use letterhead paper that is printed with low-temperature inks, such as those used in some types of thermography. Do not use raised letterhead. The printer uses heat and pressure to fuse toner to the paper. Make sure that any colored - HP 4300 | Service Manual - Page 35
20 502 28 34 42 46 75 21 54 30 36 44 49 80 24 60b 33 41 50 55 90 27 68 37 45 55 61 100 28 70b 39 49 58 65 105 29 74 41 50 61 68 110 32 80b and 81, but are standardized to book/text weights of 50, 60, 70, and 80. Q2431-90912 Chapter 1 Printer description 15 - HP 4300 | Service Manual - Page 36
used in the HP LaserJet printer must be specifically designed for laser printers. If labels other than those compatible with laser printers are used, there toner adhesion properties. A transparency that is made of poor materials or that is too thin can easily melt in the fuser and damage the printer. - HP 4300 | Service Manual - Page 37
) curl, and should not contain air. (Envelopes that trap air might cause problems.) q Condition: Make sure that envelopes are not wrinkled, nicked, or otherwise with more than one flap that folds over to seal must use adhesives compatible with the heat and pressure in the printer. The extra flaps - HP 4300 | Service Manual - Page 38
its construction is better suited for feeding through a laser printer. For optimum printer performance, do not use paper that is heavier than 200 stacking problems, jams, poor toner fusing, poor print quality, or excessive mechanical wear. The stacker and stapler/stacker do not support card stock - HP 4300 | Service Manual - Page 39
media to avoid The following characteristics can affect the performance of the HP LaserJet 4200/4300 printer unless the paper or other print media used is specifically designed to work with HP LaserJet printers. q Print media that is very rough, highly textured, or heavily embossed. q Multipart - HP 4300 | Service Manual - Page 40
at the http://www.hp.com/go/msds website. Laser safety Do not open the laser scanner assembly. Avoid direct exposure to the laser beams. Using controls, making adjustments, bypassing safety switches, or performing procedures other than those specified in this service manual can result in exposure to - HP 4300 | Service Manual - Page 41
EMI statement (Korea) VCCI statement (Japan) Q2431-90912 Chapter 1 Printer description 21 - HP 4300 | Service Manual - Page 42
osynlig laserstrålning, som överskrider gränsen för laserklass 1. HUOLTO HP LaserJet 4200 series, 4300 series -kirjoittimen sisällä ei ole käyttäjän huollettavissa olevia kohteita. Laitteen säteilyominaisuuksista: Aallonpituus 775-795 nm Teho 5 mW Luokan 3B laser 22 Printer description Q2431-90912 - HP 4300 | Service Manual - Page 43
instructions by one or more Part 15 of FCC rules. Attaching a network interface cable to the printer's LAN connector(s) changes the Class B rating to Class A. For more information see the supplementary ibformation in the "Declaration of Conformity" on page 26. Q2431-90912 Chapter 1 Printer - HP 4300 | Service Manual - Page 44
and instructions are included in every new HP LaserJet print cartridge and supplies package. 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. (See http://www.hp.com/support/ljpaperguide - HP 4300 | Service Manual - Page 45
world's landfills. The HP LaserJet print cartridges and supplies are collected and bulk shipped to our resource and recovery partners who disassemble the cartridge. After a thorough quality inspection, selected parts are reclaimed for use in new print cartridges. Remaining materials are separated - HP 4300 | Service Manual - Page 46
Guide 22 and EN 45014 Manufacturer's Name: Hewlett-Packard Company Manufacturer's Address: 11311 Chinden Boulevard Boise, Idaho 83714-1021, USA declares that the product Product Name: HP LaserJet 4200 series HP LaserJet 4300 series 47 CFR, Part 15 Class network 49 Printer description Q2431-90912 - HP 4300 | Service Manual - Page 47
2 Service approach Contents Service approach 28 Parts and supplies 28 Ordering information 28 Related documentation and software 28 Support 28 HP-authorized resellers and support 29 HP service agreements 29 HP PartnerCare 29 Worldwide service and support offices 30 Print-cartridge - HP 4300 | Service Manual - Page 48
. Go to http://www.hp.com/go/partsinfo for the online HP service parts identification tool (HP PartSurfer). Use only the accessories that are specifically designed for this printer. Order accessories from an authorized service or support provider, or online at http://www.hp.com (for more information - HP 4300 | Service Manual - Page 49
name (for example, HP LaserJet 4300 dtns) q product serial number (found on the underside of the control-panel door. q the date of purchase of your printer and a description of the problem you are experiencing Test the software installation. Attempt to print a test page from the software program - HP 4300 | Service Manual - Page 50
Worldwide service and support offices Finland: 358 (0)203 47 288 q France: 33 (0)1 43 62 34 34 q Germany: 49 (0)180 52 58 143 q Greece: +30 (0)1 619 64 11 q Hungary: +36 Seoul: 080 999-0700 Latin America q Malaysia: +60 (3) 295 2566 q New Zealand: +64 (9) 356 6640 q Philippines: +63 (2) 867 3551 q - HP 4300 | Service Manual - Page 51
the major consumable parts. The print cartridge contains the printing drum and a supply of toner. At five-percent page coverage, a print cartridge prints approximately 12,000 pages (for the HP LaserJet 4200) or 18,000 pages (for the HP LaserJet 4300). A print cartridge might print fewer pages if it - HP 4300 | Service Manual - Page 52
Hewlett-Packard limited warranty statement HP PRODUCT HP LaserJet 4200, 4200n, 4200tn, 4200dtn, 4200dtns, and 4200dtnsL HP LaserJet 4300, 4300n, 4300tn, 4300dtn, 4300dtns, and 4300dtnsL DURATION OF WARRANTY 1 year from purchase date - return for repair 1 year from purchase date - return for repair - HP 4300 | Service Manual - Page 53
in materials and workmanship for the life of the cartridge until the HP toner is depleted. The HP toner is depleted when the printer indicates a toner-low message. Hewlett-Packard will, at its option, profits from any break of this warranty or otherwise. Q2431-90912 Chapter 2 Service approach 33 - HP 4300 | Service Manual - Page 54
34 Service approach Q2431-90912 - HP 4300 | Service Manual - Page 55
submenu 49 Stapler/stacker submenu 51 I/O submenu 52 For information about the resets submenu, diagnostics menu, and the service menu, see "Resets submenu" on page 247, "Diagnostics menu" on page 248, and "Service menu (service PIN codes)" on page 249. Q2431-90912 Chapter 3 Printer operation - HP 4300 | Service Manual - Page 56
Figure 2. PAUSE/RESUME button Display DOWN ARROW button Printer online HELP button Control-panel layout Control-panel lights The control-panel lights provide information about printer status. Table 15. Control-panel lights Light Indication Ready The printer is ready to print. Data The - HP 4300 | Service Manual - Page 57
features a Help system at the control panel that provides instructions for resolving most printer errors. Some Help topics include animations that appear on the printer control panel display to show you how to resolve an error. To view Help for a message (if one is available), press HELP ( ). If - HP 4300 | Service Manual - Page 58
on page 248, and "Service menu (service PIN codes)" on page 249. Setting the control-panel display language The control-panel display can be set to display messages in different languages. The default setting is English. 1. Press and hold the SELECT ( ) button while turning on the printer. Continue - HP 4300 | Service Manual - Page 59
page 248) q Service menu ("Service menu (service PIN codes)" on page 249) Printing and changing control-panel menus To see the current settings for the menus and items that are available at the control panel, print a control-panel menu map. You might want to store the menu map near the printer for - HP 4300 | Service Manual - Page 60
and software program override control-panel settings (software-program settings override printer-driver settings). If you cannot gain access to a menu or item, it is either not an option for the printer, or you have not enabled the associated higher-level option. See the network administrator if - HP 4300 | Service Manual - Page 61
mass storage devices. For more information, see the HP LaserJet 4200/4300 Use Guide. PRINT PCL FONT LIST The PCL font list shows all the PCL fonts that are currently available to the printer. For more information, see the HP LaserJet 4200/4300 Use Guide. PRINT PS FONT LIST The PS font list shows - HP 4300 | Service Manual - Page 62
media" on page 14. Some items on this menu (such as duplex and manual feed) are available in the program or printer driver (if the appropriate driver is installed). Program and printer-driver settings override control panel settings. For more information, see the HP LaserJet 4200/4300 Use Guide. The - HP 4300 | Service Manual - Page 63
the standard media size currently *PLAIN loaded in the specified tray, where [N] is the number of PREPRINTED the tray. LETTERHEAD TRANSPARENCY PREPUNCHED LABELS BOND RECYCLED COLOR CARDSTOCK > 164 g/m2 ROUGH Q2431-90912 Chapter 3 Printer operation 43 - HP 4300 | Service Manual - Page 64
Program and printer-driver settings override control-panel settings. In general, it is better to change these settings in the printer driver, if applicable. The following section lists the settings and their possible values in the Printing submenu. The default value for each setting is the one that - HP 4300 | Service Manual - Page 65
MANUALLY FEED [PAPER SIZE] appears on the printer control-panel display. COURIER FONT *REGULAR DARK Specify the version of Courier font to use: REGULAR: The internal Courier font available on the HP LaserJet 4 series printers. DARK: The internal Courier font available on the HP LaserJet 4200/4300 - HP 4300 | Service Manual - Page 66
on this menu are available in the software program or the printer driver (if the appropriate driver is installed). Program and printer-driver settings override control-panel settings. For more information, see the HP LaserJet 4200/4300 Use Guide. In general, it is best to change these settings in - HP 4300 | Service Manual - Page 67
transparencies can result in permanent damage to the printer and fuser. Always select Transparencies as the Type in the printer driver and set the tray type at the printer control panel to TRANSPARENCY. When selected, RESTORE MODES resets the fuser mode for each media type back to its default - HP 4300 | Service Manual - Page 68
or the printer driver. (Program and printer-driver settings override control-panel settings.) CREATE CLEANING PAGE No value available. Press the SELECT ( ) button to print a cleaning page manually (for cleaning toner from the fuser). Open the rear output bin. Follow the instructions on the - HP 4300 | Service Manual - Page 69
held jobs are retained before being automatically deleted from the queue. Determines whether the printer tries to pull media from a tray other than the one that was selected in the printer driver. EXCLUSIVELY: Sets the printer to pull media only from the tray that you selected and not from another - HP 4300 | Service Manual - Page 70
when about 15 percent of the toner remains in the print cartridge when printing at 5 percent coverage. (For the 12,000-page cartridge in the LaserJet 4200 series, 15 percent means that about 1,800 pages remain. For the 18,000-page cartridge in the LaserJet 4300 series, 15 percent means that about - HP 4300 | Service Manual - Page 71
STAPLES message on the printer control-panel display. STOP: The printer stops printing until you refill the stapler. CONTINUE: The stapler accepts print jobs if it is out of staples, but the pages will not be stapled. For information about ordering a new staple cartridge, see chapter 8. Q2431-90912 - HP 4300 | Service Manual - Page 72
printer and the computer. The contents of the I/O submenu depend on which EIO card is installed. The following section lists the settings and their possible values in the I/O submenu. The default value for each setting is the one NETWORK YES NO The [X] represents the slot in which the optional HP - HP 4300 | Service Manual - Page 73
54 Cleaning the fuser 55 Running the cleaning page manually 56 To run the cleaning page manually 56 Running the cleaning page automatically 57 To run the cleaning page automatically 57 Cleaning spilled toner 57 Performing preventative maintenance 58 Resetting the maintenance-kit counter 58 - HP 4300 | Service Manual - Page 74
you change the print cartridge. q after printing approximately 10,000 pages. q whenever print-quality problems occur. Clean the outside surfaces of the printer and accessories with a water-dampened cloth. Clean the inside parts as indicated in "Cleaning the printer" on page 55. Observe the following - HP 4300 | Service Manual - Page 75
. A message (either CREATING CLEANING PAGE or CLEANING) appears on the printer control-panel display during the cleaning processes. q See "Running the cleaning page manually" on page 56. q See "Running the cleaning page automatically" on page 57. Q2431-90912 Chapter 4 Printer maintenance 55 - HP 4300 | Service Manual - Page 76
process a cleaning page more than once. When toner has been cleaned from the fuser assembly, shiny black spots appear on the page's black strip. If white spots appear on the black strip, create and process another cleaning page. Figure 2. Sample cleaning page 56 Printer maintenance Q2431-90912 - HP 4300 | Service Manual - Page 77
job in which the selected cleaning interval occurred. Cleaning spilled toner Defective or worn print cartridges can develop leaks. Also, after a jam has occurred, some toner might remain on the rollers and guides inside the printer. The pages that print immediately after the jam might pick up this - HP 4300 | Service Manual - Page 78
Part number q 110-V printer kit (HP LaserJet 4200 series) Q2429A q 110-V printer kit (HP LaserJet 4300 series) Q2436A q 220-V printer kit (HP LaserJet 4200 series) Q2430A q 220-V printer kit (HP LaserJet 4300 series) Q2437A The maintenance kit contains userreplaceable parts and instructions - HP 4300 | Service Manual - Page 79
000CN none 200,000 pages Fuser HP LaserJet 4200 110-V HP LaserJet 4300 110-V HP LaserJet 4200 220- V HP LaserJet 4300 220- V RM1 HP LaserJet 4200/4300 printer component is not listed in table 28, the component should last for the life of the printer. Q2431-90912 Chapter 4 Printer maintenance 59 - HP 4300 | Service Manual - Page 80
side of the stapler/stacker. 2. Rotate the stapler unit toward the front of the printer until the unit clicks. Hold the stapler unit in this open position. 3. Push down (Only the blue part detaches.) 1 4 2 5 3 Figure 3. Replacing the stapler unit (1 of 2) 60 Printer maintenance Q2431-90912 - HP 4300 | Service Manual - Page 81
of the new stapler unit into printer until the unit clicks into place. 11. If the stapler cartridge is not installed in the stapler unit, install it now. (See "To load staples" on page 62.) 6 9 7 10 8 Figure 4. Replacing the stapler unit (2 of 2) Q2431-90912 Chapter 4 Printer maintenance - HP 4300 | Service Manual - Page 82
if the printer control panel display prompts you with a STAPLER LOW ON STAPLES message (the staple cartridge contains fewer than 70 staples) or a STAPLER OUT OF STAPLES message (the staple cartridge contains 15 or fewer staples). For more information see "Staple level detection" on page 116. Once - HP 4300 | Service Manual - Page 83
a remote firmware update Note Note Not all HP LaserJet 4200/4300 printers support remote firmware updates. A remote firmware update (RFU) can be downloaded from http://www.hp.com/go/lj4200_firmware or http://www.hp.com/go/lj4300_firmware. The RFU file on the website is a self-extracting - HP 4300 | Service Manual - Page 84
64 Printer maintenance Q2431-90912 - HP 4300 | Service Manual - Page 85
Power supply 71 Fuser-control circuit 71 Fuser over-temperature protection 72 High-voltage circuit 73 Low-voltage circuit 74 Overcurrent/overvoltage protection 75 Toner detection 75 Cartridge detection 75 Cartridge memory 75 Laser/scanner assembly 76 Laser/scanner control 77 Paper pickup - HP 4300 | Service Manual - Page 86
the transfer charging roller and photosensitive drum . . 125 Print cartridge memory chip 126 Formatter system 127 PowerSave 127 Resolution Enhancement technology Expanded I/O 128 Flash 128 Hard-disk accessory 128 CPU 128 Printer memory 129 Read-only memory 129 Random-access memory 129 DIMM - HP 4300 | Service Manual - Page 87
bin. For information about the timing of the basic operating sequence, see "HP LaserJet 4200 general timing diagram" on page 357 and "HP LaserJet 4300 general timing diagram" on page 358. Table 30. Basic printer operating sequence Period (sequence) Description Waiting This is the period of time - HP 4300 | Service Manual - Page 88
supply and the DC controller PCA. It controls the pickup and feed, laser/scanner, and image formation systems. The microprocessor on the DC controller PCA controls the operating sequence of the printer. When the printer power is in the standby sequence (see table 30 on page 67), direct current power - HP 4300 | Service Manual - Page 89
to operate motors, solenoids and other printer components based on the print command and image data sent by the host computer. For a list of DC controller PCA connectors, see figure 233 on page 356. HP LaserJet 4300 only Figure 6. DC controller PCA block diagram Q2431-90912 Chapter 5 Theory - HP 4300 | Service Manual - Page 90
drum used in the larger HP LaserJet 4300 print cartridge is heavier than the one used in the HP LaserJet 4200 printer). The lifter motor raises the plate in the tray cassette. Two fan motors rotate the left- and right-side fans. The DC controller PCA controls the operation of the motors - HP 4300 | Service Manual - Page 91
components in the printer (for example the DC controller PCA, the motors, and fans). Figure 7. Power supply block diagram Fuser-control circuit The fuser-control circuit controls the fuser's components. The two fuser heaters provide the high temperatures which cause the toner to be permanently - HP 4300 | Service Manual - Page 92
-temperature protection The fusing heater safety circuit is located on the power supply and constantly monitors the fusing temperature. To protect the fuser from excessive temperatures, the printer has the following three protective functions: q The CPU monitors the voltage of the thermistor. If the - HP 4300 | Service Manual - Page 93
charge to the photosensitive drum in the print cartridge. There are two types of primary charging biases scanner assembly generates the electrostatic image on the primary charged photosensitive drum. See "Image formation system overview" on page 68. The electrostatic image cannot be seen until toner - HP 4300 | Service Manual - Page 94
to the media). The dc negative bias is used to clean residual toner off of the transfer roller. The fuser voltage (bias) prevents toner on the media from sticking to the fuser's pressure roller. For the HP LaserJet 4200 there is one type of fuser bias. A dc positive bias is generated by the sub high - HP 4300 | Service Manual - Page 95
operating periods (see table 30 on page 67). The DC controller PCA detects toner level from 1 percent to 100 percent. If the toner is detected as being low, a message will appear on the control-panel display (see "Alphabetical printer messages" on page 258). Cartridge detection The presence of the - HP 4300 | Service Manual - Page 96
cartridge.The main components of the laser/scanner assembly are the laser driver PCA, the scanner motor, various mirrors, and the focusing lenses. Scanner motor PCA Scanner motor Scanner DC controller PCA activates the scanner motor which rotates the six-sided scanner mirror. The laser driver PCA - HP 4300 | Service Manual - Page 97
Laser/scanner control The laser/scanner control circuit on the laser driver PCA turns the laser diodes on an off according to image data signals received from the DC controller PCA. The DC controller PCA sends image data signals VD01/VD01,VD02, and /VD02 and the laser control signals CNT0, CNT1, and - HP 4300 | Service Manual - Page 98
the printer's motor(s). The printer uses tray 1 (the manual feeding tray printer are driven by two motors, a clutch, and a solenoid which are controlled by the DC controller PCA (for the HP LaserJet 4300 has three motors). See "Motor and fan control" on page 70. The pre-feed, top of page, and fuser - HP 4300 | Service Manual - Page 99
the printer. Page skew is corrected by the registration shutter and the media is transported to the fuser/delivery block (feed belt, fuser, and delivery output bin). For information about the timing of these operations, see "HP LaserJet 4200 general timing diagram" on page 357 and "HP LaserJet 4300 - HP 4300 | Service Manual - Page 100
by the tray 1 paper sensor (PS105). When the DC controller PCA receives the print command, the printer starts the initial rotation phase. (This consists of main motor warm-up, scanner motor warm-up, high-voltage control sequence and fuser warm-up.) When the initial rotation phase ends, the tray - HP 4300 | Service Manual - Page 101
Separation pad Tray 1 pickup roller Tray 1 pickup solenoid Cam Lifter Figure 17. Tray 1 pickup Q2431-90912 Chapter 5 Theory of operation 81 - HP 4300 | Service Manual - Page 102
Printing from tray 2 When the DC controller PCA receives print command, the main motor (M101) and scanner motor start rotation. When the main motor reaches its prescribed speed, the feed roller clutch (CL101) and tray 2 pickup solenoid (SL101) are activated. (The tray 2 - HP 4300 | Service Manual - Page 103
media size using the switches describe above, however the user can define the media size for the tray using the control-panel (see "Paper Handling menu" on page 42). In this case the printer may not correctly detect the media size if the user's defined size does not match the tray settings. To - HP 4300 | Service Manual - Page 104
operation has begun, the DC controller PCA determines there has been a lifter driver motor failure and a message appears on the controlpanel display (see "Alphabetical printer messages" on page 258 or "Numerical printer messages" on page 274). The DC controller PCA stops the lifting operation if - HP 4300 | Service Manual - Page 105
shutter. With the shutter out of the way, the media can continue into the printer paper path. Leading edge contacts the shutter Registration assembly shutter Media sags and the entire paper path. Figure 20. Correcting skewed media pages Q2431-90912 Chapter 5 Theory of operation 85 - HP 4300 | Service Manual - Page 106
. The rollers transport the media through the fuser/delivery block paper path. The fuser applies heat and pressure to the media to permanently bond the toner image (which was transferred to the media from the photosensitive drum in the print cartridge) to the media. The output delivery assembly - HP 4300 | Service Manual - Page 107
or has jammed. For information about the location of these sensors, see "Printer switches and sensors" on page 336. q Pre-fed sensor (PS102) q Top of page sensor (PS103) q Fuser delivery sensor (PS108) The microprocessor on the DC controller PCA checks for media jamming by timing the passing of the - HP 4300 | Service Manual - Page 108
process is stopped and a 13.XX.YY JAM message appears on the control-panel display. For more information about jam messages, see "Alphabetical printer messages" on page 258 and "Numerical printer messages" on page 274. If the fuser delivery sensor (PS108) detects the trailing edge (paper out) of the - HP 4300 | Service Manual - Page 109
JAM message appears on the control-panel display. For more information about jam messages, see "Alphabetical printer messages" on page 258 and "Numerical printer messages" on page 274. Printer residual media jam If either the top of the page sensor (PS103) or the fuser delivery sensor (PS108) does - HP 4300 | Service Manual - Page 110
Printing from the 500-sheet feeder The HP LaserJet 4200/4300 series printers support up to two optional 500-sheet feeders. The paper-feeder driver controls the operation sequences of the 500-sheet feeder. An 8-bit microprocessor in the paper-feeder driver controls the 500-sheet feeder sequences and - HP 4300 | Service Manual - Page 111
the delivery unit; and is delivered to the output bin. The 500-sheet feeder detects pickup and feed jams in the same way as the printer. See "Printer jam detection" on page 87. Figure 23. 500-sheet feeder pickup and feed diagram Q2431-90912 Chapter 5 Theory of operation 91 - HP 4300 | Service Manual - Page 112
as for the printer. See table 32 on page 83 The main motor (M101) of the printer drives the paper feeder. When the DC controller PCA sends a print command the main motor of the printer begins to rotate. When the scanner motor reaches its prescribed speed, the paper-feeder driver receives the pickup - HP 4300 | Service Manual - Page 113
Figure 25. 1,500-sheet feeder pickup and feed diagram Q2431-90912 Chapter 5 Theory of operation 93 - HP 4300 | Service Manual - Page 114
not detect media within about 30 seconds after the start of the lift operation, the paper-deck driver PCA detects a lifter motor failure and sends a signal to the DC controller PCA. An error message appears on the controlpanel display. Figure 26. 1,500-sheet feeder lifting mechanism 94 Theory of - HP 4300 | Service Manual - Page 115
-feeder sequence and the communication with the DC controller PCA. The DC controller PCA sends the pickup command to the envelope-feeder driver with the necessary timing. The envelope-feeder driver activates the solenoid in response to the command. The printer delivers a charge of +24 vdc to the - HP 4300 | Service Manual - Page 116
of the rollers in the envelope feeder. When the DC controller PCA sends a print command the main motor (M101) in the printer begins to rotate. After the main motor initial rotation phase is completed, the scanner motor begins to rotate. As the scanner motor rotates, the envelope pick-up motor (M901 - HP 4300 | Service Manual - Page 117
the media is feeding properly or is jamming. If a jam occurs in the envelope feeder, the error message 13.XX.YY appears on the control-panel display. For more information see "Numerical printer messages" on page 274. Envelope feeder pickup delay jam If the pickup sensor (PS103) does not detect the - HP 4300 | Service Manual - Page 118
sequence and the communication with the DC controller PCA. The duplexer driver drives the solenoid, motors, and fan according to commands that the DC controller PCA sends to the duplexer. The duplexer also communicates its status to the DC controller PCA. The printer delivers a charge of +24 vdc to - HP 4300 | Service Manual - Page 119
two stepping motors: the reversing motor (M701) and the duplex feed motor (M702). The duplexer driver controls forward and reverse rotations of the motor. The face-up output tray diverter, which is controlled by the duplexer solenoid, feeds print media to the duplexer. The duplexer cannot be used if - HP 4300 | Service Manual - Page 120
is stored in the memory. If the DC controller PCA detects that a jam has occurred, it stops print operation and an error message appears on the control-panel display. See "Alphabetical printer messages" on page 258 and "Numerical printer messages" on page 274. 100 Theory of operation Q2431-90912 - HP 4300 | Service Manual - Page 121
the printer to the stacker delivery bin. The stapler/stacker staples the media together, and then delivers it to the stapler/stacker delivery bin. The DC controller PCA controls the stacker and stapler/stacker. When the stacker or stapler/stacker feeds, the DC controller PCA sends page information - HP 4300 | Service Manual - Page 122
The following diagram illustrates the power-on sequence for the stacker and stapler stacker. Figure 32. Power-on sequence for the stacker and stapler/stacker 102 Theory of operation Q2431-90912 - HP 4300 | Service Manual - Page 123
on, dc power from the printer's lowvoltage supply circuit is supplied to the stacker. The stacker performs the power-on sequence (see figure 32 on page 102) and enters the standby mode. When it receives a signal from the DC controller PCA, the stacker driver PCA activates the motors and solenoids - HP 4300 | Service Manual - Page 124
jogger guide. The jogger guide helps to align the pages before printer's main motor) to rotate the feed and delivery rollers). The feed roller moves the media into the stacker. If the DC controller PCA sends a following-page signal (which means there is another page in the job), the stacker driver - HP 4300 | Service Manual - Page 125
within a specific time after the stacker driver has received the paper delivery signal, the DC controller PCA determines that a stacker feed delay control-panel display. For more information about jam messages, see "Alphabetical printer messages" on page 258 and "Numerical printer messages" on page - HP 4300 | Service Manual - Page 126
on dc power from the printer's low-voltage supply circuit is supplied to the stapler/stacker. The stapler/stacker performs the power on sequence (see figure 32 on page 102) and enters the standby mode. When the DC controller PCA sends a signal, the stapler/stacker driver PCA activates the motors and - HP 4300 | Service Manual - Page 127
of media and confirm the position of the jogger guide. The jogger guide helps to align the pages before stapling and dropping them into the delivery bin switch (SW1102) Detects the presence of staples in the stapler cartridge Staple home position switch (SW1103) Determines if the stapler cam is - HP 4300 | Service Manual - Page 128
Figure 36. Stapler/stacker motors, solenoids, and sensors block diagram 108 Theory of operation Q2431-90912 - HP 4300 | Service Manual - Page 129
fifteen pages of media are stapled into one set and the stacks are then delivered to the delivery bin. After the leading edge of the media reaches the fixing delivery sensor (PS108) in the printer the DC controller PCA sends a signal to the stapler/stacker driver PCA. The stapler/stacker driver PCA - HP 4300 | Service Manual - Page 130
waiting position, and the stapler/ stacker driver PCA again activates the paddle motor (M1101) counterclockwise to engage the upper and lower delivery rollers. Upper delivery roller Lower delivery roller Jogger guides Figure 38. Stapler/stacker Printer Waiting position Turn-out position Media - HP 4300 | Service Manual - Page 131
job • No. The feed motor (M1101) changes speed and another page enters the stapler/ stacker. The stapler/stacker driver PCA activates the jogger motor and the jogger guide moves to align the media stack horizontally. The stapler/stacker driver PCA activates the paddle motor and the paddle pushes the - HP 4300 | Service Manual - Page 132
After the pages are stapled, the stapler/stacker driver PCA activates the feed motor (M1103; counterclockwise) to again engage the upper and lower delivery rollers. The stapled stack is moved all of the way out onto the jogger guides. The stapler/stacker driver PCA activates the jogger motor (M1102) - HP 4300 | Service Manual - Page 133
, the staple-detection switch, and the staple-module home-position switch. The staple cartridge holds a maximum of 1,000 staples. The stapler/stacker driver PCA controls the stapler unit. Stapler unit Figure 44. Stapler unit I/O block diagram Stapler/stacker Q2431-90912 Chapter 5 Theory - HP 4300 | Service Manual - Page 134
The staple mode is enabled by using the printer's settings (see "Stapler/stacker submenu" on page 51). The stapling procedure begins when media enters the staple guide and the DC controller PCA sends the end-of-job signal to the stapler/stacker driver PCA. Stapler unit Staples Figure 45. Figure 46 - HP 4300 | Service Manual - Page 135
into a "u" shape. While this is happening, the staple arm raises the swing guide. Staple Figure 47. Side view Front view Staple operation (2 of 3) As and through the media. The staple arm raises the back end of the support base, bringing its front end in contact with the staple legs that - HP 4300 | Service Manual - Page 136
sends the staple command 70 more times, a staple out message appears on the control-panel display. See "Alphabetical printer messages" on page 258. Stapler unit Staples Over 70 staples in the cartridge Figure 49. Staple-detection switch Staple level detection Staple-detection flag Less than 70 - HP 4300 | Service Manual - Page 137
within a specific time after the stacker driver has received the paper delivery signal, the DC controller PCA determines that a stapler/stacker feed control-panel display. For more information about jam messages, see "Alphabetical printer messages" on page 258 and "Numerical printer messages" on page - HP 4300 | Service Manual - Page 138
of the cartridge and the remaining toner level. If the toner in the cartridge becomes lower than a specific level, or if there is no cartridge in the printer, an error message appears on the control-panel display. See "Alphabetical printer messages" on page 258 or "Numerical printer messages" on - HP 4300 | Service Manual - Page 139
Figure 50. Image formation block diagram Q2431-90912 Chapter 5 Theory of operation 119 - HP 4300 | Service Manual - Page 140
the drum and then the exposing it to the laser beam. The laser beam naturalizes the section of the drum so that it attracts toner during the developing operation. Primary charging The conditioning process consists the primary charging roller applying a uniform negative charge on the surface of the - HP 4300 | Service Manual - Page 141
the top of the toner cartridge, and onto the . This is how the printer achieves its true 1200 by controller PCA, where it is converted to an electrical signal this is used to synchronize the output of video data for one sweep (two scan lines) and to diagnose problems with the laser diode or scanner - HP 4300 | Service Manual - Page 142
consists of a metallic cylinder that rotates around a fixed magnetic core inside the toner cavity. Toner is a powdery substance made of black plastic -density control in the print-quality menu adjusts the dc bias of the developing cylinder by changing the force of attraction between the toner and - HP 4300 | Service Manual - Page 143
the drum surface is transferred to the paper. A positive charge that the transfer roller applies to the back of the media causes the negatively charged toner on the drum surface to be attracted to the sheet of media. The small diameter of the drum, combined with the stiffness of the paper - HP 4300 | Service Manual - Page 144
to the fuser heater during the standby mode which conserves energy. For the HP LaserJet 4200, a dc negative bias (charge) is applied to the fixing film. This stabilizes the toner so that it does not scatter the toner over the media and produce a blurred image. For the HP LaserJet 4300, a dc negative - HP 4300 | Service Manual - Page 145
media operation is not completed. A dc negative bias (charge) is applied to the transfer charging roller opposite the photosensitive drum, which causes the residual toner to be attracted to the drum. A cleaning blade is in contact with the surface of the drum at all times. As the drum rotates during - HP 4300 | Service Manual - Page 146
in a row, the DC controller PCA detects a print cartridge memory failure and a 10.00.00 SUPPLIES MEMORY ERROR error message appears on the control-panel display (see "Numerical printer messages" on page 274). DC Controller PCA Memory chip controller circuit Print cartridge Figure 57. Memory chip - HP 4300 | Service Manual - Page 147
HP Fast Infrared Receiver. PowerSave This feature in the configuration menu conserves power after the printer has been idle for an adjustable period of time. When the printer is in PowerSave mode, the control panel backlight is turned off, but the printer retains all printer settings, downloaded - HP 4300 | Service Manual - Page 148
in one of the EIO slots on the rear of the formatter. The optional EIO-based hard disk is used for creating multiple original prints (mopies) and storing forms, fonts, and signatures. CPU The HP LaserJet 4200 series printer formatter incorporates a 300 MHz RISC processor. The HP LaserJet 4300 series - HP 4300 | Service Manual - Page 149
appear on the control panel until GO is pressed. If an error occurs that prevents printing and AUTO CONTINUE=ON is set, the printer goes offline for upgrade printer firmware, insert a new firmware DIMM in DIMM slot 1 (the uppermost slot) inside the formatter assembly. See "Firmware DIMM" on page 160. - HP 4300 | Service Manual - Page 150
host about such things as the control panel settings, and it allows the control panel settings to be changed from the host. q Dynamic I/O switching allows the printer to be configured with a host on each I/O. The printer can receive data from more than one I/O simultaneously, until the I/O buffer is - HP 4300 | Service Manual - Page 151
fan (left side 168 Cooling fan (right side; HP LaserJet 4300 series printer only) . . . . . 170 Laser/scanner assembly 173 Print-cartridge motor (HP LaserJet 4300 series printer only 175 Main motor 177 Tray 2 lifter-drive assembly 179 DC controller PCA 181 Paper-pickup assembly 183 Main drive - HP 4300 | Service Manual - Page 152
rollers 204 500-sheet feeder right-side cover 204 500-sheet feeder control PCA 207 500-sheet feeder media-size sensor 208 500-sheet feeder cover 217 1,500-sheet feeder right-side cover 218 1,500-sheet feeder control PCA 220 1,500-sheet feeder media-size sensor 221 1,500-sheet feeder lifter - HP 4300 | Service Manual - Page 153
cartridge (remove the print cartridge prior to transporting the printer back to the customer). q Reconnect all cables to the product. q Replace all of the accessories and load the media. q Print a configuration page and verify that the latest firmware is installed on the printer. See "Downloading - HP 4300 | Service Manual - Page 154
printer and provides guidelines to help determine where each type of screw is used. The screws can vary in length depending on the thickness of the material that is being fastened. Always note where each type of screw is located and replace each one to fasten sheet metal parts to the sheet metal - HP 4300 | Service Manual - Page 155
door Fuser Tray 1 pickup roller Tray 1 separation pad Top cover Control-panel assembly Right-side cover1 Tray 2 media-size sensor Tray 2 lifter-drive assembly Cooling fan (right side; HP LaserJet 4300 only)2 Laser/scanner Paper-pickup assembly3 Print-cartridge motor (HP LaserJet 4300 only - HP 4300 | Service Manual - Page 156
printer and trays are placed on a level work surface. When servicing the printer and accessories, unlatch the locking mechanism and separate the printer when the printer is in place. The wheels should be unlocked only when the printer is being relocated. Figure 58. Location of printer, input trays - HP 4300 | Service Manual - Page 157
parts Print cartridge 1. Open the control-panel door. Figure 59. CAUTION Print cartridge (1 of 2) 2. Firmly grasp the print cartridge and pull it up and out of the printer. Do not expose the print cartridge to bright light or direct sunlight for long periods of time. This can damage the cartridge - HP 4300 | Service Manual - Page 158
CAUTION Transfer roller 1. Open the control-panel door and tray 1. Do not touch the black rubber on the roller. Skin oils on the roller can cause print-quality problems. The use of disposable gloves is recommended when down (the solid end is face up). 138 Removing and replacing parts Q2431-90912 - HP 4300 | Service Manual - Page 159
roller (2 of 2) When you install the pickup roller, place the two pivot pins in the lower mounting slots (callout 2) and rotate the roller into the printer until it snaps into place. Q2431-90912 Chapter 6 Removing and replacing - HP 4300 | Service Manual - Page 160
remove it. Then proceed to step 2. 1. Remove the front accessory cover (not shown). See "Accessory covers and the tray 2 extension door" on page 143. 2. Insert the tip of a a small flat-blade screwdriver under the tray 1 separation pad. 3. Carefully twist the screwdriver to dislodge the separation - HP 4300 | Service Manual - Page 161
the round, black spacer next to the roller is correctly positioned against the locking pin on the shaft (callout 1). Q2431-90912 Chapter 6 Removing and replacing parts 141 - HP 4300 | Service Manual - Page 162
printer to extend beyond the edge of the work surface. The printer can become unbalanced and fall, which can cause damage to the printer or personal injury to the service technician. 3. Move the front of the printer are on the drive gear (callout 2). 142 Removing and replacing parts Q2431-90912 - HP 4300 | Service Manual - Page 163
optional stapler/stacker) have been removed to service the printer. 1. Grasp the top accessory cover (the stacker or stacker). Rotate the cover toward the front of the printer to release it, and then lift it up to remove it of the printer. Figure 70. Accessory covers (2 of 4) Q2431-90912 Chapter - HP 4300 | Service Manual - Page 164
rear accessory cover (the mounting position for the optional duplexer) and pull it straight out of the printer. Figure 71. Accessory covers (3 of 4) 4. Rotate the tray 2 extension door to the horizontal door. Figure 72. Accessory covers (4 of 4) 144 Removing and replacing parts Q2431-90912 - HP 4300 | Service Manual - Page 165
Formatter cover 1. Grasp the formatter cover. 2. Pull the cover straight back and away from the printer. Figure 73. Formatter cover Q2431-90912 Chapter 6 Removing and replacing parts 145 - HP 4300 | Service Manual - Page 166
and off of the printer to remove it. Then proceed to step 2. 1. Remove the top accessory cover. See "Accessory covers and the tray 2 extension door" on page 143. 2. Remove the two rear mounting screws (callout 1). 21 Figure 74. Top cover (1 of 5) 3. Open the print-cartridge door. Remove the front - HP 4300 | Service Manual - Page 167
-nose pliers to release the print-cartridge drive-arm (callout 3). Hint Push the drive-arm back into the printer to avoid damaging it when you away from the printer. Do not apply stress to the control-panel wire-harness (callout 4) when rotating the top cover away from the printer. 4 Figure 77 - HP 4300 | Service Manual - Page 168
is re-installed, make sure that the wire-harnesses are properly routed through the cable guides. If the wire-harnesses are not properly routed, they can be damaged when the top cover is installed. The control-panel wire-harness connector can easily be disconnected when you install the top cover. If - HP 4300 | Service Manual - Page 169
side cover 1. Remove the following assemblies: q Formatter cover. See "Formatter cover" on page 145. q Top cover. See "Top cover" on page 146. 2. Release the upper right-side cover-locking tab near the formatter (callout -side cover (2 of 4) Q2431-90912 Chapter 6 Removing and replacing parts 149 - HP 4300 | Service Manual - Page 170
the locking tab to release it 2 Figure 81. Right-side cover (3 of 4) 5. Open the formatter door and rotate the right-side cover away from the printer and lift it up to remove it. 23 Figure 82. Reinstall note Right-side cover (4 of 4) When you install the right-side cover, verify that - HP 4300 | Service Manual - Page 171
Left-side cover 1. Remove the top cover. See "Top cover" on page 146. 2. Release the upper (callout 1) and front left-side cover-locking tabs. 1 Figure 83. Left-side cover (1 of 2) 3. Rotate the top of the cover away from the printer and lift the cover up to remove it. Figure 84. Left-side cover - HP 4300 | Service Manual - Page 172
Tray 1 1. Open tray 1. Use your fingers to gently pry the paper-guide slide-pin hinges out of the hinge slots on the tray 1 door to release the pins. Figure 85. Tray 1 (1 on the door (callout 2) so that the door will open and close properly. 152 Removing and replacing parts Q2431-90912 - HP 4300 | Service Manual - Page 173
it. 4. Rotate tray 1 upward and release the return spring (callout 3) from the bottom of tray 1. 3 Figure 88. Tray 1 (4 of 6) Q2431-90912 Chapter 6 Removing and replacing parts 153 - HP 4300 | Service Manual - Page 174
and away from the printer to release the left paper-guide hinge. Figure 89. Tray 1 (5 of 6) 6. Slide the paper guide to the left to that you will not lose it. Reinstall note When installing the tray 1 paper guide, hook the short end of the return spring in the small notch located below - HP 4300 | Service Manual - Page 175
is installed, lift it up slightly and pull it away from the printer to remove it. 1. Open the rear output bin. Use your finger Figure 91. Rear output bin (1 of 2) 2. Rotate the output bin away from the printer until the right hinge pin is released, and then remove the output bin. Figure 92. - HP 4300 | Service Manual - Page 176
Control-panel display Control-panel overlay 1. Use a small flat-blade screwdriver to carefully pry the top of the control-panel overlay (circled; callout 1) away from the printer. 2. Remove the overlay. 1 Figure 93. Control-panel overlay 156 Removing and replacing parts Q2431-90912 - HP 4300 | Service Manual - Page 177
-panel mounting screws into the printer when you remove the control panel, they might be difficult to recover. Severe damage to the printer can result if the power is turned on when loose screws are inside the unit. 1. Remove the top cover. See "Top cover" on page 146. 2. Place the top cover upside - HP 4300 | Service Manual - Page 178
callout 2) on the print cartridge door to clear the opening (callout 3) in the top cover. Remove the control panel PCA cover. 3 2 Figure 95. Reinstall note Control-panel assembly (2 of grounding strip. 5 4 Figure 96. Control-panel assembly (3 of 4) 158 Removing and replacing parts Q2431-90912 - HP 4300 | Service Manual - Page 179
(ESD). Always perform service work at an ESD-protected workstation. 6. Use your fingers to gently pry the front of the print-cartridge door away from the controlpanel display to release the retainer clip (callout 6). Unplug the control-panel wire-harness (callout 7). Remove the control panel. 67 56 - HP 4300 | Service Manual - Page 180
printer chassis before servicing the product 1. Remove the formatter cover. See "Formatter cover" on page 145. If possible, print a menu map and a configuration page. See "Menu map" on page 240 and "Configuration page" on page slot). The printer will not recognize DIMMs if they are not installed - HP 4300 | Service Manual - Page 181
initialization" on page 251. Then use the control-panel display to access the service menu and enter the total page count, the maintenance count, the service ID, the cold reset paper size, and the serial number. See "Service menu (service PIN codes)" on page 249. Finally, reset the printer's display - HP 4300 | Service Manual - Page 182
Remove the rear output bin. See "Rear output bin" on page 155. 2. Squeeze the blue fuser release tabs (callout 1). 1 Figure 100. CAUTION Fuser (1 of 2) 3. Pull the fuser straight back and out of the printer. Do not drop or jar the fuser. It can easily be damaged if it is mishandled. Figure 101 - HP 4300 | Service Manual - Page 183
See "Top cover" on page 146. q Rear output bin. See "Rear output bin" on page 155. 2. Release the locking pin on the shaft lock and rotate the lock toward the rear of the printer until the inner retaining tab view, formatter side; 1 of 2) Q2431-90912 Chapter 6 Removing and replacing parts 163 - HP 4300 | Service Manual - Page 184
of the assembly slightly and move the assembly toward the formatter assembly to remove it. 2 1 Figure 103. Output delivery assembly (2 of 2) 164 Removing and replacing parts Q2431-90912 - HP 4300 | Service Manual - Page 185
pendulum assembly The duplexing pendulum assembly is part of the paper-path switching mechanism when the optional duplexer accessory is installed. It also drives the output delivery assembly. 1. Remove the following assemblies: q Top cover. See "Top cover" on page 146. q Rear output bin. See "Rear - HP 4300 | Service Manual - Page 186
gear-side up on your workstation to prevent the gears from coming off of the shafts. 3. Pull the duplexing pendulum assembly toward the laser/scanner until the upper gear-drive shaft clears the hole in the chassis, and then remove the assembly. Figure 105. Duplexing pendulum assembly (2 of 2) 166 - HP 4300 | Service Manual - Page 187
assembly. See "Formatter assembly" on page 161. 2. Unplug the sensor connector (callout 1). Remove two screws (callout 2). 2 Figure 106. 1 Tray 2 media-size sensor (1 of 2) 3. Depress the locking tab (callout 3), and slide the sensor toward the front of the printer to release it. Remove the - HP 4300 | Service Manual - Page 188
side) 1. Remove the following assemblies: q Top cover. See "Top cover" on page 146. q Left-side cover. See "Left-side cover" on page 151. 2. Remove two screws (callout 1). Remove the power-supply shield (callout 2). Figure 109. Main cooling fan (2 of 4) 168 Removing and replacing parts Q2431-90912 - HP 4300 | Service Manual - Page 189
Remove one screw printer. CAUTION When you install the fan, do not apply too much pressure to the wire-harness connectors when they are connected to the power supply. Too much pressure might snap off the soldered connectors on the power supply. Q2431-90912 Chapter 6 Removing and replacing parts - HP 4300 | Service Manual - Page 190
Note Cooling fan (right side; HP LaserJet 4300 series printer only) This fan is not installed in the HP LaserJet 4200 series printer. 1. Remove the following assemblies: q Top cover. See "Top cover" on page 146. q Right-side cover. See "Right-side cover" on page 149. 2. Gently pry back the two - HP 4300 | Service Manual - Page 191
in the wire-harnesses to unweave them easily from the harness guide. 3 4 Figure 114. Cooling fan (HP LaserJet 4300 series only; 3 of 5) 5. Use a screwdriver to push against the fan through the fan duct, from inside the printer. Release the two retaining tabs (callout 5) and push the fan out - HP 4300 | Service Manual - Page 192
going to be removed), unweave the remaining wire-harness (callout 6) from the harness guide (callout 7). Remove two screws (callout 8) and remove the fan-duct bracket. harness guide. 8 6 7 Figure 116. Cooling fan (HP LaserJet 4300 series only; 5 of 5) 172 Removing and replacing parts Q2431-90912 - HP 4300 | Service Manual - Page 193
"Right-side cover" on page 149. 2. Unplug the laser/scanner wire-harness connector from the DC controller PCA (location J84; callout 1). Remove the laser/scanner wire-harness from the wire guide (callout 2). 2 1 Figure 117. Laser/scanner (1 of 4) 3. Unplug the laser/scanner wire-harness (callout - HP 4300 | Service Manual - Page 194
/scanner is installed. 5. Carefully lift the laser/scanner up and out of the printer. Make sure the wires along the bottom of the laser/scanner assembly Laser/scanner (4 of 4) When the laser/scanner assembly is installed, make sure that the wire-harnesses are properly routed through the cable guides. - HP 4300 | Service Manual - Page 195
Print-cartridge motor (HP LaserJet 4300 series printer only) This motor is not installed on the HP LaserJet 4200 series printer. 1. Remove the following assemblies: q Top cover. See "Top cover" on page 146. q Right-side cover. See "Right-side cover" on page 149. 2. Unplug the print-cartridge motor - HP 4300 | Service Manual - Page 196
3. Slip the toroid (callout 3) off of its retainer clip. Support the motor and remove three screws (callout 4). Remove the print-cartridge motor. 3 4 Figure 122. Print-cartridge motor (HP Laserjet 4300 series only; 1 of 2) 176 Removing and replacing parts Q2431-90912 - HP 4300 | Service Manual - Page 197
-side cover. See "Right-side cover" on page 149. 2. Unplug the power-supply ribbon cables and the main motor harness connector from the DC controller PCA (locations J80, J81, and J98; callout 1). Unweave all of the wire-harnesses from the wire guide (callout 2). 1 2 Figure 123. Main motor (1 of - HP 4300 | Service Manual - Page 198
4. Remove three screws (callout 4). Remove the main motor. 34 Figure 125. Main motor (3 of 3) 178 Removing and replacing parts Q2431-90912 - HP 4300 | Service Manual - Page 199
. See "Right-side cover" on page 149. 2. Use a small flat-blade screwdriver to pry up the lifter-drive assembly connector (callout 1) retaining tab and unplug the connector from the DC controller PCA (location J93). Unweave the harness from the wire guides (callout 2). Hint It might be necessary - HP 4300 | Service Manual - Page 200
tension spring (callout 3). Remove one screw (callout 4). Remove the lifter-drive assembly. Hint It might be necessary to remove some wire guides to easily remove the lifter-driver assembly. 3 4 Figure 127. Tray 2 lifter-drive assembly (2 of 2) 180 Removing and replacing parts Q2431-90912 - HP 4300 | Service Manual - Page 201
"Formatter assembly" on page 161. The product contains components that are sensitive to electrostatic discharge (ESD). Always perform service work at an ESD-protected workstation. If an ESD-protected workstation is not available, discharge body static by grasping the printer chassis before touching - HP 4300 | Service Manual - Page 202
in on the locking tab (callout 6) on the rear of the DC controller PCA wire guide (callout 6), and then push up on the guide to release it. Remove the DC controller PCA and formatter connector assembly. 6 67 Figure 130. DC controller PCA (3 of 3) 182 Removing and replacing parts Q2431-90912 - HP 4300 | Service Manual - Page 203
cover" on page 149. 2. Remove one e-clip (callout 1) and the shaft collar (callout 2). Lift the power-switch connector-bar (callout 3) up and swing it away from the paper-pickup gear assembly. 3 1 2 Figure 131. Note Paper-pickup assembly (1 of 5) 3. From the right side of the printer, push the - HP 4300 | Service Manual - Page 204
from the wire guide to gain access to the solenoid wire-harness. 45 56 Figure 133. 4 Paper-pickup assembly (3 of 5) 5. Remove four screws (callout 7). Reach inside the printer and push the rear tray 2 feed roller up into its raised position (see "Tray 2 feed rollers (4 of 4)" on page 142). This - HP 4300 | Service Manual - Page 205
pickup gear assembly mounting bracket and printer chassis. When you install the paper-pickup assembly, reach up inside the printer and push the rear feeder roller (see figure 68 on page 142) up into its raised when the tray 2 drive-gear/shaft is removed. Chapter 6 Removing and replacing parts 185 - HP 4300 | Service Manual - Page 206
-side fan (HP LaserJet 4300 series only) and fan duct. See "Cooling fan (right side; HP LaserJet 4300 series printer only)" on page 170. q Print-cartridge motor (HP LaserJet 4300 series only). See "Print-cartridge motor (HP LaserJet 4300 series printer only)" on page 175. q DC controller PCA. See - HP 4300 | Service Manual - Page 207
3. Remove five screws (callout 3). Remove the main drive assembly. 3 Figure 138. Main drive assembly (2 of 2) Q2431-90912 Chapter 6 Removing and replacing parts 187 - HP 4300 | Service Manual - Page 208
. q Fuser. See "Fuser" on page 162. q Formatter assembly. See "Formatter assembly" on page 161. 2. Unplug the two power-supply ribbon cables and the DC controller power connector from the DC controller (locations J80, J81, and J99; callout 1). Unweave the wire-harness and cables from the wire guide - HP 4300 | Service Manual - Page 209
(callout 6) toward the back of the chassis to release it. Remove the guide. Rotate the power-switch connector bar (callout 7) away from the printer. 7 4 6 5 Figure 140. Power supply (2 of 5) 4. Remove five . Power supply (left side; 3 of 5) Q2431-90912 Chapter 6 Removing and replacing parts 189 - HP 4300 | Service Manual - Page 210
step, verify that the four rubber belts and plastic rollers (callout 3 in figure 145 on page 191) remain in place. These belts and rollers can easily come off and you might lose when they are placed in the wire guide. Make sure you install the power-switch connector bar when you install the - HP 4300 | Service Manual - Page 211
assembly 1. Remove the power supply. See "Power supply" on page 188. 2. Remove three screws (callout 1). 1 Figure 144. CAUTION center foot (on the power-supply side; callout 4) is correctly hooked under the support leg on the power supply. 3. Release the paper-feed belt assembly alignment pins ( - HP 4300 | Service Manual - Page 212
146 through "Left-side cover" on page 151. q Tray 1. See "Tray 1" on page 152. 2. Unplug the tray 1 pickup solenoid connector and the top-cover sensor from the DC controller PCA (locations J79 and J95; callout 1). Unweave the harnesses from the wire guide (callout 2). Hint It might be necessary - HP 4300 | Service Manual - Page 213
shown) and remove the cover. 4 3 Figure 147. Reinstall note Tray 1 pickup assembly (2 of 4) 4. Unplug the pickup sensor connector (callout 5). Remove six screws (callout 6). One of the screws (callout 7) on the left side is longer that the others. Make sure that this screw is replaced in the same - HP 4300 | Service Manual - Page 214
gear) is correctly positioned against the dimple in the chassis. Figure 150. Correct position of the tray 1 pickup assembly grounding spring 194 Removing and replacing parts Q2431-90912 - HP 4300 | Service Manual - Page 215
. q Tray 1 pickup assembly. See "Tray 1 paper-pickup assembly" on page 192. 2. Unplug the paper-feed assembly wire-harness connector from the DC controller PCA (location J89; callout 1). Unweave the wire-harness from the wire guide (callout 2). Hint It might be necessary to remove additional wire - HP 4300 | Service Manual - Page 216
3. Feed the paper-feed assembly wire-harness through the hole in the chassis (callout 2). Remove three screws (callout 3). 3 2 Figure 152. Paper-feed assembly (2 of 2) 196 Removing and replacing parts Q2431-90912 - HP 4300 | Service Manual - Page 217
appear on the control-panel display when the printer power is turned on. Verify that the clutch tab on the right side of the paper feed assembly is inserted into the hole in the plastic frame. The anti-static bar (see "Cooling fan (right side; HP LaserJet 4300 series printer only)" on page 170) can - HP 4300 | Service Manual - Page 218
Registration assembly 1. Remove the main drive assembly. See "Main drive assembly" on page 186. 2. Remove one e-clip retainer (callout 1) and one screw (callout 1). Remove the registration roller drive gear (callout 2). 1 2 Figure 154. Registration assembly (1 of 3) 3. Remove three screws ( - HP 4300 | Service Manual - Page 219
plate) to raise the registration-roller plate. Remove three screws (two large self-tapping screws on the right-hand side and one silver machine screw; callout 5). Remove the registration assembly. 5 4 Figure 156. Registration assembly (3 of 3) Q2431-90912 Chapter 6 Removing and replacing - HP 4300 | Service Manual - Page 220
"Power supply" on page 188. q Tray 1 pickup assembly. See "Tray 1 paper-pickup assembly" on page 192. 2. Remove four screws (callout 1; right side). Remove the one e-ring retainer clip and gear (callout 2). 2 1 Figure 157. Transfer assembly (1 of 5) 200 Removing and replacing parts Q2431-90912 - HP 4300 | Service Manual - Page 221
3. Remove the tray 2 left-side guide mounting screw (callout 3). Depress the tray 2 left-side guide locking tab (callout 4). Slide the guide out of the chassis to remove it. 3 4 Figure 158. Transfer assembly (left rear view; 2 of 5) Q2431-90912 Chapter 6 Removing and replacing parts 201 - HP 4300 | Service Manual - Page 222
side, remove 16 screws (callout 6; 15 if the paper-feed assembly has been removed). 56 56 Figure 160. Transfer assembly (4 of 5) 202 Removing and replacing parts 56 Q2431-90912 - HP 4300 | Service Manual - Page 223
6. Support the transfer assembly and carefully separate the left side of the chassis from the laser/scanner shelf and the chassis bottom panel. Slide the transfer assembly away from the 9 Figure 162. Q2431-90912 Correct alignment of the left-side chassis Chapter 6 Removing and replacing parts 203 - HP 4300 | Service Manual - Page 224
rollers located up inside of the 500-sheet feeder is the same as the procedure for the tray 2 feed rollers. See "Tray 2 feed rollers" on page 141. 500-sheet feeder right-side cover 1. Remove two screws (callout 1) and the front cover (callout 2). 1 2 Figure 163. 500-sheet feeder right-side cover - HP 4300 | Service Manual - Page 225
of the cover and release the three center locking tabs. Figure 165. 500-sheet feeder right-side cover (3 of 5) Q2431-90912 Chapter 6 Removing and replacing parts 205 - HP 4300 | Service Manual - Page 226
away from the tray assembly and lift it up to remove it. Figure 167. 500-sheet feeder right-side cover (5 of 5) 206 Removing and replacing parts Q2431-90912 - HP 4300 | Service Manual - Page 227
500-sheet feeder right-side cover. See "500-sheet feeder right-side cover" on page 204. 2. Unplug six wire-harness connectors (callout 1). 3. Remove two screws (callout 2). 4. Remove the PCA. 2 1 Figure 168. 500-sheet feeder control PCA Q2431-90912 Chapter 6 Removing and replacing parts 207 - HP 4300 | Service Manual - Page 228
500-sheet feeder media-size sensor 1. Remove the 500-sheet feeder PCA. See "500-sheet feeder control PCA" on page 207. 2. Remove two screws (callout 1). 1 12 Figure 169. 500-sheet feeder media-size sensor (1 in the corresponding holes in the chassis. 208 Removing and replacing parts Q2431-90912 - HP 4300 | Service Manual - Page 229
-side cover. See "500-sheet feeder right-side cover" on page 204. 2. Unplug the lifter-drive harness connector from the assembly PCA (location J803; callout 1). Disconnect the tension spring (callout 2) and remove one screw (callout 3). 1 2 3 Figure 171. 500-sheet feeder lifter-drive assembly - HP 4300 | Service Manual - Page 230
"500-sheet feeder right-side cover" on page 204. q 500-sheet feeder tray lifter-drive assembly. See "500-sheet feeder lifter-drive assembly" on page 209. 2. Unplug the main drive solenoid harness . 500-sheet feeder paper-pickup drive assembly (2 of 7) 210 Removing and replacing parts Q2431-90912 - HP 4300 | Service Manual - Page 231
at the top of the angular brace 56 68 Figure 176. 500-sheet feeder paper-pickup drive assembly (4 of 7) Q2431-90912 Chapter 6 Removing and replacing parts 211 - HP 4300 | Service Manual - Page 232
6. Remove one e-clip and the shaft collar (callout 9). 79 Figure 177. 500-sheet feeder paper-pickup drive assembly (5 of 7) 7. Push the shaft of the paper-pickup gear assembly. Figure 178. 500-sheet feeder paper-pickup drive gear assembly (6 of 7) 212 Removing and replacing parts Q2431-90912 - HP 4300 | Service Manual - Page 233
of the shaft and be loose inside the paper-pickup assembly when the tray drive-gear/shaft is removed. Q2431-90912 Chapter 6 Removing and replacing parts 213 - HP 4300 | Service Manual - Page 234
feeder is the same as the procedure for the tray 2 feed rollers. See "Tray 2 feed rollers" on page 141. 1,500-sheet feeder separation roller 1. Open the 1,500-sheet feeder door. Open the feed roller cover. Figure the shaft-locking pin (callout 1 & 2). 214 Removing and replacing parts Q2431-90912 - HP 4300 | Service Manual - Page 235
1,500-sheet feeder door 1. Remove one screw (callout 1) and remove the door-stop plate (callout 2). 2 1 Figure 183. 1,500-sheet feeder door (1 of 3) 2. Open the 1,500 slide-bar from the feeder. Figure 184. 1,500-sheet feeder door (2 of 3) Q2431-90912 Chapter 6 Removing and replacing parts 215 - HP 4300 | Service Manual - Page 236
, remove the hinge pins and the door spring (callout 2). Place the pins and the spring where you will not lose them. 216 Removing and replacing parts Q2431-90912 - HP 4300 | Service Manual - Page 237
from the feeder. Lift up on the cover to release it. Figure 187. 1,500-sheet feeder rear cover (2 of 2) Q2431-90912 Chapter 6 Removing and replacing parts 217 - HP 4300 | Service Manual - Page 238
" on page 217. 2. Remove one screw (callout 1). 1 Figure 188. 1,500-sheet feeder right-side cover (1 of 3) 3. Use a flat-blade screwdriver to release the cover-locking tab (door hinge side; callout 2) 2 Figure 189. 1,500-sheet feeder right-side cover (2 of 3) 218 Removing and replacing parts - HP 4300 | Service Manual - Page 239
4. Rotate the top of the cover away from the chassis and then lift it up and remove it. Figure 190. 1,500-sheet feeder right-side cover (3 of 3) Q2431-90912 Chapter 6 Removing and replacing parts 219 - HP 4300 | Service Manual - Page 240
and "1,500-sheet feeder right-side cover" on page 218. 2. Unplug six wire-harness connectors (callout 1). 1 Figure 191. 1,500-sheet feeder control PCA (1 of 2) 3. Remove two screws (callout 2). Use a pair of needle-nose pliers to squeeze the top of one of the nylon PCA tabs (callout 3). Gently - HP 4300 | Service Manual - Page 241
See "1,500-sheet feeder rear cover" on page 217 and "1,500-sheet feeder right-side cover" on page 218. 2. Unplug the sensor wire-harness at the sensor (callout 1). 3. Remove one screw (callout 2). 4. Remove the sensor. flush with the chassis. Q2431-90912 Chapter 6 Removing and replacing parts 221 - HP 4300 | Service Manual - Page 242
"1,500-sheet feeder door" on page 215. q Rear and right-side covers. See "1,500-sheet feeder rear cover" on page 217 and "1,500-sheet feeder right-side cover" on page 218. 2. Unplug the lifter-drive 1 2 1,500-sheet feeder lifter-drive assembly (1 of 4) 222 Removing and replacing parts Q2431-90912 - HP 4300 | Service Manual - Page 243
in the bracket. Slide the collar off of the shaft. Figure 196. 1,500-sheet feeder lifter-drive assembly (3 of 4) Q2431-90912 Chapter 6 Removing and replacing parts 223 - HP 4300 | Service Manual - Page 244
7. Slide the lifter-drive assembly away from the chassis until the lifter-drive gear-shaft clears the corresponding hole in the bracket. Remove the assembly. Figure 197. 1,500-sheet feeder lifter-drive assembly (4 of 4) 224 Removing and replacing parts Q2431-90912 - HP 4300 | Service Manual - Page 245
See "1,500-sheet feeder door" on page 215. q Rear and right-side covers. See "1,500-sheet feeder rear cover" on page 217 and "1,500-sheet feeder right-side cover" on page 218. 2. Unplug the paper-pickup drive the paper-pickup drive assembly. Q2431-90912 Chapter 6 Removing and replacing parts 225 - HP 4300 | Service Manual - Page 246
226 Removing and replacing parts Q2431-90912 - HP 4300 | Service Manual - Page 247
status page 242 Embedded Web server 243 Gaining access to the embedded Web server 243 Information tab 244 Settings tab 244 Networking tab 244 Other links 245 Printer Status and Alerts software 245 To select status messages 246 To view status messages and information 246 Control-panel - HP 4300 | Service Manual - Page 248
path test 327 Stapler/stacker paper path test 328 Paper transport errors 330 Malfunction errors 330 Component errors 331 Printer component locations 332 Main printer parts 332 Printer switches and sensors 336 Printer motors and fans 337 Printer PCAs 338 228 Troubleshooting Q2431-90912 - HP 4300 | Service Manual - Page 249
diagram 353 Stacker accessory wiring diagram 354 Stapler/stacker accessory wiring diagram 355 DC controller connectors diagram 356 General timing diagrams 357 HP LaserJet 4200 general timing diagram 357 HP LaserJet 4300 general timing diagram 358 Q2431-90912 Chapter 7 Troubleshooting 229 - HP 4300 | Service Manual - Page 250
the source of communication problems to the printer hardware, the printer configuration, the network configuration, or the software application. See "Interface troubleshooting" on page 255. q Display-message troubleshooting This section explains each control-paneldisplay message and suggests - HP 4300 | Service Manual - Page 251
check the following: q Are supply items (for example, the print cartridge, fuser, and rollers) within their rated life? q Does the configuration page reveal any configuration problems? See "Configuration page" on page 241. Hint The customer is responsible for checking and maintaining supplies, and - HP 4300 | Service Manual - Page 252
in the tray correctly? q Are the paper guides aligned with the paper? q Is the tray cassette installed correctly in the printer? Print cartridge q Is the print cartridge installed correctly? Fuser q Is the fuser installed correctly? See "Fuser" on page 162. Covers q Is the top cover closed - HP 4300 | Service Manual - Page 253
(print cartridges, memory modules, and EIO cards) installed in the printer and remove them. Hewlett-Packard recommends the use of HP components in its printers. q Remove the printer from the network, and make sure that the failure is associated with the printer before beginning troubleshooting - HP 4300 | Service Manual - Page 254
-message tables in this chapter to understand the message and correct the problem. See "Alphabetical printer messages" on page 258 and "Numerical printer messages" on page 274. Event log Print an event log. If error messages appear on the control-panel display when you try to see or print the event - HP 4300 | Service Manual - Page 255
you print a configuration page? NO YES Configuration page Print an event log. If error messages appear on the control-panel display when you try to see or print the configuration page, see "Alphabetical printer messages" on page 258 and "Numerical printer messages" on page 274. Image quality Does - HP 4300 | Service Manual - Page 256
DIMM" on page 160. 6. Remove any HP Jetdirect or other EIO cards, and then try to turn the printer on again. If the printer control-panel display is blank, but the main cooling fan runs briefly after the printer power is turned on, try printing an engine test page to determine whether the problem is - HP 4300 | Service Manual - Page 257
Replace the power supply assembly. See "Power supply" on page 188. 4. Replace the DC controller. See "DC controller PCA" on page 181 Note: The fan only operates during the initial startup and while printing, and when the temperature inside the printer is too high. If the temperature is too high, the - HP 4300 | Service Manual - Page 258
Power-on defect or blank display (continued) Problem Action The fan works, but the control-panel display is blank. 1. Print an engine test. "Engine test page" on page 254 2. If the engine test is successful, perform the following steps in order. q Reseat the control panel and formatter connector - HP 4300 | Service Manual - Page 259
see the HP LaserJet 4200/4300 Use Guide. The information pages include the following. q Menu map: A menu map shows how individual items are configured within the high-level (user-set values) menus. The last page of the menu map series describes instructions about how to use the control-panel buttons - HP 4300 | Service Manual - Page 260
and select configuration settings. Printing a menu map is very helpful when you are changing numerous printer settings. 1. Press the SELECT ( ) button to open the menus. 2. Use the UP MAP, and then press the SELECT ( ) button. Figure 201. Sample menu map page 240 Troubleshooting Q2431-90912 - HP 4300 | Service Manual - Page 261
, see "Converting the Service ID to an actual date" on page 250. If an HP Jetdirect print server is installed, an HP Jetdirect configuration page prints as well. HP LaserJet 4200n/tn/dtn/dtns/dtnsL and 4300n/tn/dtn/dtns/dtnsL printers come with an HP Jetdirect printer server installed. 1. Press the - HP 4300 | Service Manual - Page 262
E. Maintenance kit gauge Lists the website for ordering supplies over the Internet Provides information about the amount of toner available in the print cartridge, and shows the print-cartridge part number and estimated pages that can be printed for the amount of toner in the cartridge Lists - HP 4300 | Service Manual - Page 263
life for all supplies and order new supplies q view and change tray configurations q view and change the printer control panel menu configurations q view and print internal pages q receive notification of printer and supplies events q view and change the network configuration To use the embedded Web - HP 4300 | Service Manual - Page 264
part numbers. To order new supplies, click Order Supplies in the Other Links area on the left side of the window. To visit this or any website, you must have Internet access. q Event log. Shows a list of all printer events and errors. q Usage page. Shows a summary of the number of pages the printer - HP 4300 | Service Manual - Page 265
supplies, such as print cartridges and paper. q Product Support connects to the support site for the HP LaserJet 4200/4300 printer, where you can search for help regarding general topics. Printer Status and Alerts software Printer Status and Alerts is supported only for Windows 95 and later versions - HP 4300 | Service Manual - Page 266
the left side of the window. 3. In the For field, select the printer driver for this printer, or select All Printers. 4. Clear the options for network administrator has restricted the rights to this function. To view status messages and information On the left side of the window, select the printer - HP 4300 | Service Manual - Page 267
printer settings. Not all of the available menus are described in this manual. For more information about control-panel menus, see "Control-panel menus" on page 39. Using control settings does not affect the network parameter settings on the optional HP Jetdirect print server. CAUTION Restoring - HP 4300 | Service Manual - Page 268
Diagnostics menu Administrators can use this menu to isolate parts and to troubleshoot jam and print-quality issues. The following section lists the settings and their possible values in the Diagnostics menu. The default value for each setting is the one that has an asterisk (*) next to it. Table - HP 4300 | Service Manual - Page 269
to type an eight-digit PIN code. The printer automatically exits the service menu after about one minute if no menu items are selected or changed. Use the PIN code 11420002 for the HP LaserJet 4200 product and the PIN code 11430002 for the HP LaserJet 4300 product. 1. Press the Select ( ) button to - HP 4300 | Service Manual - Page 270
can provide the date, in this case a time server on the same network as the printer. When the printer is not connected to a date source, the service ID is not available, and 00000 appears on the configuration page. Restoring the Service ID If you replace the formatter, the date is lost. Use this - HP 4300 | Service Manual - Page 271
(see "Menu map" on page 240 and "Configuration page" on page 241). Use the information on the configuration page to reset any customer-set printer configuration values that the NVRAM initialization procedure changes. Take special note of the total page count, maintenance count, and the serial number - HP 4300 | Service Manual - Page 272
reformats the printer hard disk. Perform a hard disk initialization only if an error code on the control panel indicates an EIO disk error. Always try initializing the hard disk before replacing it. Before performing a hard-disk initialization, print a menu map and a configuration page (see "Menu - HP 4300 | Service Manual - Page 273
) button, and then turn the printer power on. Continue holding down the SELECT ( ) button until all three printer control panel lights flash once and then remain ( ) button. The printer continues the power-on sequence and begins to continuously printing configuration pages. 5. Press the Pause/ - HP 4300 | Service Manual - Page 274
/stacker) is functioning, print an engine test page. Use a small, non-metallic, pointed object to depress the test-page switch, which is located on the right side of the printer (callout 1). The test page should have a series of vertical lines. The test page will print from the last tray you printed - HP 4300 | Service Manual - Page 275
product warranty. Refer the customer to the network administrator for assistance in troubleshooting network problems. If the printer is not connected directly to a Windows or MS-DOS-based host, see "EIO troubleshooting" on page 255. HP LaserJet printers are not designed to work with mechanical - HP 4300 | Service Manual - Page 276
properly installed and the printer completes its internal diagnostics, the I/O CARD READY status message prints. If communication is lost, an I/O NOT READY status message prints, followed by a two-digit error code. See the HP Jetdirect Network Interface Configuration Guide for further details and - HP 4300 | Service Manual - Page 277
Critical-error messages inform you of a device failure. Some of these messages can be cleared by turning the printer off and then on. These messages are not affected by the auto-continue setting. If a critical error persists, then service is required. Q2431-90912 Chapter 7 Troubleshooting 257 - HP 4300 | Service Manual - Page 278
rear bin or CANNOT DUPLEX Check paper The printer cannot perform the duplex function. 1. Close the face-up bin before sending a duplex print job. 2. Replace the duplexer. 3. Replace the DC controller PCA. See "DC controller PCA" on page 181. CARTRIDGE FAILURE For help press alternates with RETURN - HP 4300 | Service Manual - Page 279
press The file system device is 1. To enable writing to the disk, protected and no new files can be turn off the write protection by written to it. using the device storage manager in HP Web Jetadmin. 2. Press the SELECT ( ) button to continue. Q2431-90912 Chapter 7 Troubleshooting 259 - HP 4300 | Service Manual - Page 280
the flash DIMM. See "Firmware DIMM" on page 160. FLASH FILE OPERATION FAILED alternates with READY For menus press The printer received a PJL file system command that attempted to perform an illogical operation (for example, a command to download a file to a non-existent directory). 1. Printing - HP 4300 | Service Manual - Page 281
ARROW ( ) button to step through the instructions. 4. If the error persists, replace the cartridge. 5. Verify that the connectors between power supply and transfer assembly are not damaged. 6. Replace the power supply. See "Power supply" on page 188. 7. Replace the transfer assembly. See "Transfer - HP 4300 | Service Manual - Page 282
step through the instructions. 5. If the error persists, verify that the fuser connector (J128 for the HP LaserJet 4200; J228 for the HP LaserJet 4300) is good. 6. Replace the fuser assembly. See "Fuser" on page 162. 7. Replace the DC controller PCA. See "DC controller PCA" on page 181. 8. Replace - HP 4300 | Service Manual - Page 283
error persists, replace the stacker or stapler/stacker. MANUALLY FEED For help press alternates with MANUALLY instructions. 3. If the requested paper size and type is installed in one of the trays, print a configuration page (see "Configuration page" on page 241) to see if the printer - HP 4300 | Service Manual - Page 284
the error message persists, the memory chip on the print cartridge or the connector (location J600) might be defective. 4. The DC controller PCA might be defective. Replace the DC controller PCA. See "DC controller PCA" on page 181. NOTE: Printer repairs that are required as a result of using non-HP - HP 4300 | Service Manual - Page 285
instructions that come with this kit. 200,000 pages (default setting). -or- q Q2429A; 110 V printer kit for the HP LaserJet 4200 Continue printing and order a q Q2436A; 110 V printer kit printer maintenance kit for the HP LaserJet 4300 q Q2430A; 220 V printer kit for the HP LaserJet 4200 - HP 4300 | Service Manual - Page 286
perform an illogical operation (for example, a command to download a file to a nonexistent directory). 1. Printing can continue. 2. Turn the printer off and then on to delete the message from the display. 3. If this error persists, a problem might exist with the software application. RAM DISK FILE - HP 4300 | Service Manual - Page 287
and the DOWN ARROW ( ) button to step through the instructions. 3. Supplies-ordering information is also available from the embedded Web server. 4. If this error persists, replace the power supply. See "Power supply" on page 188. RESEND UPGRADE The firmware upgrade was not completed successfully - HP 4300 | Service Manual - Page 288
500-sheet feeder control PCA" on page 220. 5. Replace the DC controller PCA. See "DC controller PCA" on page 181. STANDARD OUTPUT BIN FULL Remove all paper from bin The top (standard) output bin is full and must be emptied. 1. Empty the top output bin. 2. If the error persists, verify that - HP 4300 | Service Manual - Page 289
. 2. Press the UP ARROW ( ) button and the DOWN ARROW ( ) button to step through the instructions. 3. Replace the staple cartridge. 4. If this error persists, Replace the stapler unit (see "To remove and replace the stapler unit" on page 60) followed by the stapler/stacker if necessary. TOO MANY - HP 4300 | Service Manual - Page 290
printer the tray switch to "custom", adjust the paper guides against the paper, and close the tray. error persists, verify that the indicated tray's media-size sensors (SW102, SW801, or SW1) is properly functioning correctly. See figure 213 on page 336, figure 217 on page 340, or figure 220 on page - HP 4300 | Service Manual - Page 291
guides paper size. Press the in a non-standard configuration. SELECT ( ) button. The printer is prompting you to 2. If the media used is Letter, use the control before the size can be selected at the control panel. 3. Print a configuration page and verify that the tray size settings match - HP 4300 | Service Manual - Page 292
BY TRAY The printer is reporting the current control panel display is incorrect and the tray paper guides are properly adjusted, verify that the indicated tray's media-size sensor (SW102, SW801, or SW1) is operating. See figure 213 on page 336, figure 217 on page 340, or figure 220 on page - HP 4300 | Service Manual - Page 293
or configuration the printer, or install a disk problem. drive in the printer. See "Firmware DIMM" on page 160. 2. If a disk drive is installed, delete the previously stored print jobs to increase the disk storage space. 3. If this error persists, check the printer driver and application - HP 4300 | Service Manual - Page 294
it. See "Print printer can keep track of the page cartridge" on page 137. count for the print cartridge. 2. Install a new HP print cartridge. XX Description 3. Check the connection 00 memory error on the cartridge between the 10 memory device not found DC controller PCA (location J97 - HP 4300 | Service Manual - Page 295
as you insert the cartridge. Replace any defective print cartridge. 4. For information about how to resolve a jam, see the specific numerical error codes in this table (the following 13.XX.YY error codes are not in numerical sequence). 5. See "Paper-path troubleshooting" on page 295 in this chapter - HP 4300 | Service Manual - Page 296
tray-size message appears on the control-panel display. If there is no delay and you do not hear the tray-lift motor lift the tray plate into place, replace the tray's stack position sensor (PS107, PS802, or SR2). See "Printer switches and sensors" on page 336, "500-sheet feeder switches, sensors - HP 4300 | Service Manual - Page 297
). "Location of printer switches and sensors" on page 336. 7. Replace the fuser (PS108). See "Fuser" on page 162. 8. Replace the DC controller PCA. See "DC controller PCA" on page 181. 9. If this error message appears frequently, see "Paper-path troubleshooting" on page 295. Q2431-90912 - HP 4300 | Service Manual - Page 298
"Location of printer switches and sensors" on page 336 and "Fuser" on page 162. 6. Turn the power off. Remove the duplexer and turn the power on. If the error message persists, replace the DC controller PCA. See "DC controller PCA" on page 181. 7. Replace the fuser (PS108). See "Fuser" on page 162 - HP 4300 | Service Manual - Page 299
ARROW ( ) button and the DOWN ARROW ( ) button to step through the instructions. 3. Remove all of the pages from the output bin. 4. Open the jam-access door and remove all of the pages. Close the access door. 5. If this error message persists, replace the stapler/stacker. 13.12.09 JAM IN - HP 4300 | Service Manual - Page 300
the duplexer and turn the power on. If this error persists, replace the DC controller PCA. See "DC controller PCA" on page 181. 5. Replace the duplexer. 13.1C.00 FUSER JAM For help press A jam exists in the fuser area. The 1. Remove the fuser. media is probably wrapped 2. Turn the blue knob to - HP 4300 | Service Manual - Page 301
controller PCA. See "DC controller PCA" on page 181 20 INSUFFICIENT MEMORY For help press alternates with 20 INSUFFICIENT MEMORY To continue press The printer 3. If this error message persists, replace the EIO card. 22 PARALLEL I/O BUFFER OVERFLOW For help press The printer's parallel buffer - HP 4300 | Service Manual - Page 302
-feed, top-of-page, and fuser delivery- sensors (PS102, PS103, PS108) are operating and the sensor flags can move freely. See "Location of printer switches and sensors" on page 336. 5. Replace the DC controller PCA. See "DC controller PCA" on page 181. 41.X PRINTER ERROR For help press - HP 4300 | Service Manual - Page 303
one connections, or specific installed on your printer and applications. your printer can receive a firmware update, download Sometimes, the formatter itself is the newer firmware upgrade. at fault, which is usually indicated Not all HP LaseJet 4200/ by a 79 SERVICE ERROR. 4300 printers - HP 4300 | Service Manual - Page 304
. See "Formatter assembly" on page 161. 50.X FUSER ERROR For help press A fuser error has occurred. X Description 1 low fuser temperature 2 fuser warmup service 3 fuser over temperature 4 faulty fuser 5 incorrect fuser is installed 6 open fuser circuit 1. Turn the printer off and allow it to cool - HP 4300 | Service Manual - Page 305
Replace the DC controller PCA. See "DC controller PCA" on page 181. 52.XY PRINTER ERROR For help press alternates with 52.XY PRINTER ERROR To continue turn off then on A printer error has occurred. X Description 0 scanner error 1 scanner startup error 2 scanner rotation error 1. Press the SELECT - HP 4300 | Service Manual - Page 306
Reseat the connectors between the DC controller PCA and the formatter. 4. If the problem persists, replace the DC controller PCA. See "DC controller PCA" on page 181. 5. Replace the formatter. See "Formatter assembly" on page 161. 56.1 PRINTER ERROR To continue turn off then on Unknown - HP 4300 | Service Manual - Page 307
then on. 57.3 Cartridge fan error (F2) 1. Reconnect the connector between the fan and the DC controller PCA (location J78). 2. Replace the fan. See "Cooling fan (right side; HP LaserJet 4300 series printer only)" on page 170. 3. Replace the DC controller PCA. See "DC controller PCA" on page 181. 57 - HP 4300 | Service Manual - Page 308
side of the printer) and the power supply (location J63). 3. Replace the air-temperature sensor. See "Main cooling fan (left side)" on page 168. 4. Replace the power supply. See "Power supply" on page 188. 58.3 DC controller 1. Replace the DC controller PCA. See "DC controller PCA" on page 181. 58 - HP 4300 | Service Manual - Page 309
wire-harness on the DC controller PCA (location J86). 3. Replace the print-cartridge motor. See "Print-cartridge motor (HP LaserJet 4300 series printer only)" on page 175. 4. Replace the DC controller PCA. See "DC controller PCA" on page 181. 59.2 MAIN MOTOR ROTATION ERROR The main motor is not - HP 4300 | Service Manual - Page 310
the EP-motor wire-harness on the DC controller PCA (location J86). 4. Replace the EP motor. See "Print-cartridge motor (HP LaserJet 4300 series printer only)" on page 175. 5. Replace the DC controller PCA. See "DC controller PCA" on page 181. 60.2 PRINTER ERROR The tray 2 lifter-motor is not - HP 4300 | Service Manual - Page 311
firmware DIMM. See "Firmware DIMM" on page 160. 4. Replace the formatter assembly. See "Formatter assembly" on page 161. 64 PRINTER ERROR For help press alternates with 64 PRINTER ERROR To continue turn off then on A scan-buffer error has occurred. 1. Turn the printer off and then on. 2. If the - HP 4300 | Service Manual - Page 312
and replacing the stapler unit" on page 60. 7. If other errors messages persist, replace the stacker or stapler/stacker. 68.X PERMANENT STORAGE ERROR For help press alternates with 68.X PERMANENT STORAGE ERROR To continue press One or more printer settings that 1. Press the SELECT ( ) button - HP 4300 | Service Manual - Page 313
, but behave printer off and then on. unexpected in response to the 3. If a 68.0 error persists, changed settings. Initialize NVRAM. See the caution and note in "To X Description initialize NVRAM" on 0 onboard NVRAM page 251. 1 flash DIMM or hard drive 4. For 68.1 errors, use the HP Web - HP 4300 | Service Manual - Page 314
Download Drivers and Software. Check for the latest firmware image version at the bottom of the page. If this firmware image is newer than the one installed on your printer and your printer can receive a firmware update, download the newer firmware upgrade. Not all HP LaseJet 4200/ 4300 printers - HP 4300 | Service Manual - Page 315
the top-cover area underneath the print cartridge. When clearing jams, be very careful not to tear the jammed media. If a small piece of media is left in the printer, it could cause additional jams. If jams are a recurring problem, see "Persistent jams" on page 298. After you have cleared the jammed - HP 4300 | Service Manual - Page 316
, you may want to disable paper jam recovery. If paper-jam recovery is disabled, the printer will not attempt to reprint the jammed pages. During the recovery process, the printer might reprint several pages that were printed properly before the paper jam occurred. Be sure to remove any duplicated - HP 4300 | Service Manual - Page 317
specifications. chapter 1 in this manual or the HP print media guide (available at http://www.hp.com/support/ljpaperguide) for media recommendations. A supply item is installed incorrectly, which causes repeated jams. Verify that the print cartridge and the fuser are correctly installed. You - HP 4300 | Service Manual - Page 318
for jams consists of the following: 1. Gather data. 2. Identify the cause of the problem. 3. Fix the problem. Data collection To troubleshoot jams, gather the following information: q the exact error code that appears on the control panel q the location of the leading edge of all of the media that - HP 4300 | Service Manual - Page 319
the media is correctly loaded in the input trays and that all length and width guides are set correctly. ❏ Clean the printer. Toner and paper dust in the paper path can inhibit free movement of the media through the printer and can block the sensors. ❏ Use the paper path-test on the Diagnostic menu - HP 4300 | Service Manual - Page 320
one or more test pages that can be used to isolate the cause of jams. To isolate a jam, you can specify which input tray to use, which output bin to use, specify whether to use the duplex path, and the number of pages to print. Printing multiple pages helps to isolate intermittent jam problems - HP 4300 | Service Manual - Page 321
Replace the lifter-drive assembly. See "Tray 2 lifter- sensor (PS107) is defective. drive assembly" on page 179 and/or "Printer switches and sensors" on page 336 The DC controller PCA is defective. Replace the DC controller PCA. See "DC controller PCA" on page 181. Q2431-90912 Chapter - HP 4300 | Service Manual - Page 322
drive assembly" on page 225. The connector to the printer has poor contact. Inspect the connector to the printer. Replace any damaged connectors. The paper feeder pickup solenoid is damaged. 1. Disconnect the connector for the paper feeder solenoid from the feeder control PCA. 2. Measure the - HP 4300 | Service Manual - Page 323
pre-feed (PS102), top-of-page (PS103), or fuser assembly (PS108) sensor(s) is defective. Replace the sensor. See "Location of printer switches and sensors" on page 336. The DC controller PCA is defective. Replace the DC controller PCA. See "DC controller PCA" on page 181. Avoid using odd-sized - HP 4300 | Service Manual - Page 324
(part two, paper path exit) Cause Solution The fuser inlet guide is dirty. Replace the fuser. See "Fuser" on page 162. The fuser pressure roller is dirty or damaged. Run several cleaning pages through the printer. See "Running the cleaning page manually" on page 56. If the problem persists - HP 4300 | Service Manual - Page 325
feed roller and separation roller are worn Replace the affected roller. irregularly. The registration assembly is defective. Replace the registration assembly. See "Registration assembly" on page 198 Q2431-90912 Chapter - HP 4300 | Service Manual - Page 326
/scanner q print cartridge q fuser q transfer roller q Supporting circuitry (power supply and DC controller PCA) Before beginning image formation troubleshooting, check that the media meets the specifications listed in chapter 1 and/or the HP LaserJet Printer Family Print Media Guide. See "Supported - HP 4300 | Service Manual - Page 327
the printer driver's Paper LaserJet printer. For more information, consult the HP LaserJet Printer Family Print Media Guide. q Handle transparencies by the edges. Skin oil on the surface of transparencies can cause spots and smudges. q Small, random dark areas on the trailing edge of solid fill pages - HP 4300 | Service Manual - Page 328
the print cartridge" on page 309 and "EconoMode" on page 309. Is the customer using print media that meets all HP paper specification standards? For more information about HP's paper specification standards, see chapter 1 or the HP LaserJet Printer Family Print Media Guide. See "Supported sizes - HP 4300 | Service Manual - Page 329
are rated for 12,000 (LaserJet 4200) and 18,000 (LaserJet 4300) images at five percent coverage. It is possible to wear out the gears and the cartridge seals before TONER LOW appears on the control panel if average toner coverage is less than five percent. See "EconoMode" on page 309. q Check the - HP 4300 | Service Manual - Page 330
page from the control panel INFORMATION MENU. 2. Open the top cover after the paper advances half-way through the printer (about three to five seconds after the main motor begins rotation). The leading edge of the paper should have advanced past the print cartridge. 3. Remove the print cartridge - HP 4300 | Service Manual - Page 331
Drop outs and character voids" on page 315 See "Drop outs and character voids" on page 315 See "Lines" on page 316 See "Lines" on page 316 See "Grey background" on See "Loose toner or toner page 317 smear" on page 317 See "Loose toner or toner smear" on page 317 See "Repeating defects and See - HP 4300 | Service Manual - Page 332
Table 54. Print quality image defects (continued) See "Black page" on page 322. See "Blank (or white) page" See "Dark print" on on page 323. page 324. 312 Troubleshooting Q2431-90912 - HP 4300 | Service Manual - Page 333
cartridge gently to redistribute the toner. 2. Replace the cartridge. Transfer roller is worn or contaminated or maintenance might be due. q Print a supplies status page (see"Supplies status page" on page 242) and look at the maintenance kit gauge. If maintenance is due, install a maintenance kit - HP 4300 | Service Manual - Page 334
. There is dirt in the printer. 1. Print a few more pages and see if the problem corrects itself. 2. Clean the inside of the printer (see chapter 4) 3. Process a printer cleaning page. See "Running the cleaning page manually" on page 56. The print cartridge has damaged components. q Perform the - HP 4300 | Service Manual - Page 335
printers (see the HP LaserJet Printer Family Paper Specification designed for proper toner adhesion. Guide). The printers operating environment does not meet specifications. q Make sure the printer is installed in the proper environment. See "Environmental specifications" on page 7. The fuser - HP 4300 | Service Manual - Page 336
drum, replace the print cartridge. Worn or dirty fuser roller. q Process a printer cleaning page. See "Running the cleaning page manually" on page 56. Several pages might be required if the fuser is very dirty. If the problem persists, replace the fuser. See "Fuser" on page 162. Static eliminator - HP 4300 | Service Manual - Page 337
run the cleaning page manually" on page 56). Several pages might be required if the fuser is very dirty. The media surface is too rough or too smooth. q Use paper with the correct finish (smoothness) to meet HP specifications (see the HP LaserJet Printer Family Paper Specification Guide). Static - HP 4300 | Service Manual - Page 338
. See "Main drive assembly" on page 186. The print cartridge motor is defective. HP LaserJet 4300 only q Replace the print cartridge motor (HP LaserJet 4300 only). See "Print-cartridge motor (HP LaserJet 4300 series printer only)" on page 175. The DC controller PCA is defective. q Replace the - HP 4300 | Service Manual - Page 339
q Make sure the printer is installed in the proper environment. See "Environmental specifications" on page 7. Wrong output bin. q Print to a different output bin (top or rear output bin). Wrong fuser setting for the media type. q Access the configure device menu at the control panel, and change - HP 4300 | Service Manual - Page 340
path and clean or replace as necessary. The print cartridge has passed its life expectancy. q The print cartridge has an expected life of 12,000 pages for the HP LaserJet 4200 printer and 18,000 pages for the HP LaserJet 4300 printer. Replace the print cartridge. This type of defect might also be - HP 4300 | Service Manual - Page 341
does not meet specifications. q Make sure the printer is installed in the proper environment. See "Environmental specifications" on page 7. Wrong toner density setting. q Access the print-quality menu at the control panel, and adjust the toner density setting. See "Print Quality submenu" on - HP 4300 | Service Manual - Page 342
(it is not high-voltage circuitry (part of the power supply). supplying the correct voltage). 2. Replace the power supply. See "Power supply" on page 188. 3. Replace the DC controller PCA. See "DC controller PCA" on page 181. The laser/scanner assembly is defective q Replace the laser - HP 4300 | Service Manual - Page 343
sharing devices on networks might generate a blank page as a print job separator. q Check with the network administrator. Multiple feeds. The printer might be feeding two or more pages at once (intermittent problem). q Remove the media from the tray and flex the stack in one direction and then - HP 4300 | Service Manual - Page 344
density setting. q Access the print-quality menu at the control panel, and adjust the toner density setting. See "Print Quality submenu" on page 46. The print cartridge drum is close to the q Replace the print cartridge. end of its expected life. The media does not meet specifications 1. Turn - HP 4300 | Service Manual - Page 345
Roller Distance between defects Replacement part Primary charging roller 37.7 mm (1.5 inches) print cartridge Developer roller* 62.8 mm (2.5 inches) print cartridge Fuser 75.0 mm (2.95 inches; HP LaserJet 4200) 94.0 mm (3.75 inches; HP LaserJet 4300) Fuser Photosensitive drum 94.2 mm - HP 4300 | Service Manual - Page 346
Verify that the media being used meets HP recommendation. See "Supported sizes and weights of media" on page 10 and "Supported types of media" on page 14. ❏ Verify that any printer errors are corrected before troubleshooting the stacker or stapler/ stacker. The printer must be operating normally to - HP 4300 | Service Manual - Page 347
errors Stacker and stapler/stacker paper path Delivery area Printer connection pages, then press the SELECT ( ) button. 6. Use the UP ARROW ( ) button or the DOWN ARROW ( ) button to scroll to PRINT TEST PAGE, and then press the SELECT ( ) button. The printer will print the selected number of pages - HP 4300 | Service Manual - Page 348
button to scroll to STAPLES, and then press the SELECT ( ) button. Scroll to ONE, and then press the SELECT ( ) button. 5. Press the Pause/Resume button to exit to scroll to PRINT TEST PAGE, and then press the SELECT ( ) button. The printer will print 10 test pages and send them to the stapler/stacker where - HP 4300 | Service Manual - Page 349
is defective. q If necessary, replace the deflector mechanism in the printer. The stacker of stapler/stacker q Replace the stacker or stapler/stacker. PCA is defective. Table 77. Delivery area jam troubleshooting Possible cause Recommended action(s) Delivery area jams when the leading edge of - HP 4300 | Service Manual - Page 350
staple cartridge. stacker stapler unit" on page 344. The stapler unit is defective. q Replace the stapler unit. See "Location of the stapler/stacker stapler unit" on page 344. The print job contains more q When using the stapler/stacker, limit the print job to a single page size. than one paper - HP 4300 | Service Manual - Page 351
Component errors Component errors will cause a control panel message to appear on the control-panel display. For more information about these messages, see "Alphabetical printer messages" on page 258 and "Numerical printer messages" on page 274. Table 80. Component error troubleshooting Possible - HP 4300 | Service Manual - Page 352
component locations Main printer parts 2 1 Figure 209. Location of main printer parts (1 of 4) 1. Laser/scanner assembly 2. Duplex pendulum assembly 3. Main drive assembly 4. Lifter drive assembly 5. Paper pickup drive assembly 6. Paper feed assembly 332 Troubleshooting 3 4 5 6 Q2431-90912 - HP 4300 | Service Manual - Page 353
1 2 3 4 Figure 210. Location of main printer parts (2 of 4) 1. Output delivery assembly 2. Registration roller assembly 3. Tray 1 pickup assembly 4. Fuser assembly Q2431-90912 Chapter 7 Troubleshooting 333 - HP 4300 | Service Manual - Page 354
1 2 3 Figure 211. Location of main printer parts (3 of 4) 1. Transfer roller 2. Tray 1 pickup roller 3. Separation pad 334 Troubleshooting Q2431-90912 - HP 4300 | Service Manual - Page 355
1 2 3 Figure 212. Location of main printer parts (4 of 4) 1. Pickup roller 2. Feed roller 3. Separation roller (in the tray) Q2431-90912 Chapter 7 Troubleshooting 335 - HP 4300 | Service Manual - Page 356
1 2 10 3 4 9 5 8 6 7 Figure 213. Location of printer switches and sensors 1. Output bin full sensor (PS104) 2. Paper size switch ) 7. Pre-feed sensor (PS102) 8. Paper width sensor (PS106) 9. Fuser assembly delivery sensor (PS108) 10. Top of page sensor (PS103) 336 Troubleshooting Q2431-90912 - HP 4300 | Service Manual - Page 357
Printer motors and fans 1 2 3 4 5 Figure 214. Location of printer motors and fans 1. Right-side cooling fan (HP LaserJet 4300 only) 2. Print cartridge motor (HP LaserJet 4300 only) 3. Main drive motor 4. Lifter-drive motor 5. Main cooling fan Q2431-90912 Chapter 7 Troubleshooting 337 - HP 4300 | Service Manual - Page 358
Printer PCAs 1 2 Figure 215. Location of printer PCAs 1. DC controller PCA 2. Power supply (high-voltage and low-voltage circuits) 338 Troubleshooting Q2431-90912 - HP 4300 | Service Manual - Page 359
216. Location of 500-sheet paper feeder main parts 1. 500-sheet feeder lifter drive assembly 2. 500-sheet feeder pickup gear assembly 3. 500-sheet feeder feed roller 4. 500-sheet feeder separation roller (in the tray) 5. 500-sheet feeder pickup roller Q2431-90912 Chapter 7 Troubleshooting 339 - HP 4300 | Service Manual - Page 360
, sensors, solenoids, and PCAs 1 2 5 3 4 Figure 217. Location of 500-sheet paper feeder switches, sensors, solenoids, and PCAs 1. 500-sheet feeder control PCA 2. 500-sheet feeder paper pickup solenoid (SL801) 3. 500-sheet feeder paper stack position sensor (PS802) 4. 500-sheet feeder paper sensor - HP 4300 | Service Manual - Page 361
1,500-sheet feeder main parts 1 2 Figure 218. Location of 1,500-sheet paper feeder main parts (1 of 2) 1. 1,500-sheet feeder lifter-drive assembly 2. 1,500-sheet feeder pickup-drive assembly Q2431-90912 Chapter 7 Troubleshooting 341 - HP 4300 | Service Manual - Page 362
1 2 3 Figure 219. Location of 1,500-sheet paper feeder main parts (2 of 2) 1. 1,500-sheet feeder feed roller 2. 1,500-sheet feeder pickup roller 3. 1,500-sheet feeder separation roller (in the door) 342 Troubleshooting Q2431-90912 - HP 4300 | Service Manual - Page 363
feeder switches, sensors, solenoids, and PCAs 1 2 3 4 6 5 Figure 220. Location of 1,500-sheet switches, sensors, solenoids, and PCAs 1. 1,500-sheet feeder control PCA 2. 1,500-sheet feeder paper sensor (SR3) 3. 1,500-sheet feeder paper pickup solenoid (SL1) 4. 1,500-sheet feeder door sensor (SR1 - HP 4300 | Service Manual - Page 364
Stapler/stacker stapler assembly 1 Figure 221. Location of the stapler/stacker stapler unit 1. Stapler unit (stapler/stacker accessory only) 344 Troubleshooting Q2431-90912 - HP 4300 | Service Manual - Page 365
sensor (PS1102) 5. Delivery roller disengaging sensor (stapler/stacker only; PS1104)) 6. Paddle home position sensor (stapler/stacker only; PS1103) 7. Paper full sensor (PS1106) Q2431-90912 Chapter 7 Troubleshooting 345 - HP 4300 | Service Manual - Page 366
) 2. Deflector solenoid (SL1101) 3. Feed mechanism and motor (M1103) 4. Paddle mechanism and motor (stapler/stacker only; M1101) 5. Jogger mechanism and motor (stapler/stacker only; M1102) 346 Troubleshooting Q2431-90912 - HP 4300 | Service Manual - Page 367
Stacker and stapler/stacker PCAs 1 2 Figure 224. Location of the stacker and stapler/stacker PCAs 1. Stacker or staple/stacker LED PCA 2. Stacker or staple/stacker driver PCA Q2431-90912 Chapter 7 Troubleshooting 347 - HP 4300 | Service Manual - Page 368
Printer and accessory wiring diagrams Figure 225. HP LaserJet 4200 wiring diagram 348 Troubleshooting Q2431-90912 - HP 4300 | Service Manual - Page 369
Figure 226. Q2431-90912 HP LaserJet 4300 wiring diagram Chapter 7 Troubleshooting 349 - HP 4300 | Service Manual - Page 370
Figure 227. 500-sheet feeder wiring diagram 350 Troubleshooting Q2431-90912 - HP 4300 | Service Manual - Page 371
Figure 228. Q2431-90912 1,500-sheet feeder wiring diagram Chapter 7 Troubleshooting 351 - HP 4300 | Service Manual - Page 372
Figure 229. Duplex accessory wiring diagram 352 Troubleshooting Q2431-90912 - HP 4300 | Service Manual - Page 373
Figure 230. Q2431-90912 Envelope feeder accessory wiring diagram Chapter 7 Troubleshooting 353 - HP 4300 | Service Manual - Page 374
Figure 231. Stacker accessory wiring diagram 354 Troubleshooting Q2431-90912 - HP 4300 | Service Manual - Page 375
Figure 232. Q2431-90912 Stapler/stacker accessory wiring diagram Chapter 7 Troubleshooting 355 - HP 4300 | Service Manual - Page 376
cartridge) Paper handling power connector (8-pin; J96) Output bin full sensor (3-pin; J83) Control Panel (8-pin; J77) Tray 1 pickup solenoid (2-pin; J79) Scanner PCA (12-pin; J83) Tray 1 paper sensor Narrow media sensor Top of page sensor Paper feed sensor (12-pin; J87) Right-side fan LJ 4300 - HP 4300 | Service Manual - Page 377
General timing diagrams Figure 234. Q2431-90912 HP LaserJet 4200 general timing diagram Chapter 7 Troubleshooting 357 - HP 4300 | Service Manual - Page 378
Figure 235. HP LaserJet 4300 general timing diagram 358 Troubleshooting Q2431-90912 - HP 4300 | Service Manual - Page 379
Figure 236. Stapler/stacker timing diagram Q2431-90912 Chapter 7 Troubleshooting 359 - HP 4300 | Service Manual - Page 380
360 Troubleshooting Q2431-90912 - HP 4300 | Service Manual - Page 381
362 Related documentation and software 362 Support 362 HP-authorized resellers and support 363 HP service agreements 363 HP PartnerCare 363 Accessories and supplies 364 How to use the parts lists and diagrams 367 Parts diagrams and lists 368 Q2431-90912 8 Parts and diagrams 361 - HP 4300 | Service Manual - Page 382
your area. Go to http://www.hp.com/go/partsinfo/ for the online HP service parts identification tool (HP PartSurfer). Use only the parts and accessories that have been specifically designed for this printer. Order accessories from an authorized HP service or support provider, or online at http://www - HP 4300 | Service Manual - Page 383
name (for example, HP LaserJet 4300 dtns) q product serial number (found on the underside of the control-panel door. q the date of purchase of your printer and a description of the problem you are experiencing Test the software installation. Attempt to print a test page from the software program - HP 4300 | Service Manual - Page 384
HP Services provider. To find a dealer near you, see "Ordering information" on page 362 or "Worldwide service and support offices" on page 30. Table 82. Paper-handling accessories Item Product or part stacker Q2443A Q2443-69001 1,000-staple cartridge Q3216-60500 none Stapler unit Q2443- - HP 4300 | Service Manual - Page 385
LaserJet 4200 all models except base model q HP LaserJet 4300 all models SDRAM DIMM (dual inline memory module) q 8 MB q 16 MB q 32 MB q 64 MB q 128 MB Flash DIMM q 2 MB q 4 MB q 8 MB q 12 MB Font DIMM q Korean language q Simplified Chinese language q Traditional Chinese language EIO hard disk Part - HP 4300 | Service Manual - Page 386
printer kit (HP LaserJet 4300 series) Q2437A Formatter q HP LaserJet 4200 q HP LaserJet 4300 C9652A C9651A Exchange number Q2429-69001 Q2436-69001 Q2430-69001 Q2437-69001 C9651-69001 C9652-69001 Print cartridge q HP LaserJet 4200 (12,000 pages) q HP LaserJet 4300 (18,000 pages) Laser/scanner - HP 4300 | Service Manual - Page 387
Training materials Service training kit Training service and support manual on CDROM Print Media Guide For The Hp Laserjet Family Of Printers Part number Description or use Q2431-67907 Q2431-60114 A guide to HP LaserJet 4200 and HP LaserJet 4300 service training. 5980-8424 ENUS A guide to using - HP 4300 | Service Manual - Page 388
Parts diagrams and lists 1 10 11 12 9 8 LJ 4300 LJ 4200 5 2 3 4 6 7 Figure 237. External covers and panels 368 Parts and diagrams Q2431-90912 - HP 4300 | Service Manual - Page 389
-000CN Cover, cartridge door; LJ 4200 RM1-0114-000CN Cover, cartridge door; LJ 4300 RM1-0050-000CN Cover, front (be sure to order the correct name plate kit to install on the front cover) Q2425-67901 LJ4200 name plate kit Q2431-67908 LJ4300 name plate kit RG1-4276-000CN Control panel RG1 - HP 4300 | Service Manual - Page 390
1 LJ 4300 7 2 6 3 4 5 Figure 238. Main assemblies (1 of 3) 370 Parts and diagrams Q2431-90912 - HP 4300 | Service Manual - Page 391
Table 88. Main assemblies (1 of 3) Part number Description RH7-1576-000CN Motor, print cartridge (LJ 4300 only) RH1-1570-000CN Motor, main (LJ4200/4300) RC1-0270-000CN Guide, cable DC controller RC1-0061-000CN Spring, torsion RC1-0060-000CN Flag, paper-feed sensor RC1-0044-000CN Roller - HP 4300 | Service Manual - Page 392
1 2 3 8 7 6 Figure 239. Main assemblies (2 of 3) 4 5 372 Parts and diagrams Q2431-90912 - HP 4300 | Service Manual - Page 393
Table 89. Main assemblies (2 of 3) Part number Description Q2425-69001 (exchange) Laser/scanner assembly (LJ 4200) RM1-0173-000CN (new) Q2431-690001 (exchange) Laser/scanner assembly (LJ 4300) RM1-0183-000CN (new) RG1-4212-000CN Cable, laser RM1-0054-000CN Brake assembly, right RC1-0268- - HP 4300 | Service Manual - Page 394
1 2 18 17 15 16 14 12 13 11 Figure 240. 10 Main assemblies (3 of 3) 3 LJ 4300 4 5 6 7 8 9 374 Parts and diagrams Q2431-90912 - HP 4300 | Service Manual - Page 395
RG1-4236-000CN PCA, DC controller (LJ 4200) RG1-4237-000CN PCA, DC controller (LJ 4300) RH7-1577-000CN Fan, cooling right side (LJ 4300 only) RG1-4224-000CN Cable, envelope feeder RC1-0386-000CN Guide, connector cable RC1-0198-000CN Spring, tension (lifter driver assembly) RG1-4213-000CN - HP 4300 | Service Manual - Page 396
-side assemblies Table 91. Right-side assemblies Part number Description RG1-4223-000CN Cable, feeder accessory RC1-0153-000CN Guide, cassette RM1-0041-000CN Tray 2 media size sensor assembly RM1-0043-000CN Swing plate assembly RC1-0244-000CN Guide right side power supply RM1-0042-000CN - HP 4300 | Service Manual - Page 397
supply, 220-V (LJ 4200) RM1-0020-000CN (new) Q2431-69002 (exchange) Power supply, 110-V (LJ 4300) RM1-0107-000CN (new) Q2431-69003 (exchange) Power supply, 220-V (LJ 4300) RM1-0108-000CN (new) Reference 1; figure 242 2; figure 242 2; figure 242 2; figure 242 2; figure 242 8 Parts and diagrams 377 - HP 4300 | Service Manual - Page 398
1 2 Figure 243. Main drive assembly Table 93. Main drive assembly Part number Description RM1-0001-000CN Main drive assembly RC1-0003-000CN Arm, toner cartridge release (print cartridge) Reference 1; figure 243 2; figure 243 378 Parts and diagrams Q2431-90912 - HP 4300 | Service Manual - Page 399
Figure 244. Paper-pickup assembly Table 94. Paper-pickup assembly Part number Description RM1-0034-000CN Paper-pickup assembly Reference figure 244 Q2431-90912 8 Parts and diagrams 379 - HP 4300 | Service Manual - Page 400
Figure 245. Duplexing pendulum assembly Table 95. Duplexing pendulum assembly Part number Description RM1-0002-000CN Duplexing pendulum assembly Reference figure 245 380 Parts and diagrams Q2431-90912 - HP 4300 | Service Manual - Page 401
Figure 246. Tray 2 lifter driver assembly Table 96. Tray 2 lifter driver assembly Part number Description RM1-0033-000CN Lifter-drive assembly, tray 2 Reference figure 246 Q2431-90912 8 Parts and diagrams 381 - HP 4300 | Service Manual - Page 402
5 1 2 3 Figure 247. 4 Paper pickup assembly Table 97. Paper pickup assembly Part number Description RG1-4221-000CN Paper pickup sensor cable assembly (PS101 & PS107) RC1-0210 247 6; figure 247 7; figure 247 8; figure 247 9; figure 247 10; figure 247 382 Parts and diagrams Q2431-90912 - HP 4300 | Service Manual - Page 403
1 2 3 4 Figure 248. Paper-feed assembly Table 98. Paper-feed assembly Part number Description RM1-0012-000CN Paper-feed assembly XD9-0137-000CN Ring, E RU5-0050-000CN Gear, 30T RH7-5358-000CN Clutch, paper-feed assembly Reference 1; - HP 4300 | Service Manual - Page 404
Figure 249. Registration assembly Table 99. Registration assembly Part number Description RM1-0011-000CN Registration assembly 384 Parts and diagrams Reference figure 249 Q2431-90912 - HP 4300 | Service Manual - Page 405
6 5 4 Figure 250. Tray 1 assembly Q2431-90912 Table 100. Tray 1 assembly Part number Description RM1-0004-000CN Tray 1 pickup assembly RH7-5357-000CN Solenoid, tray 1 pickup 1; figure 250 2; figure 250 3; figure 250 4; figure 250 5; figure 250 6; figure 250 8 Parts and diagrams 385 - HP 4300 | Service Manual - Page 406
Figure 251. Output delivery assembly Table 101. Output delivery assembly Part number Description RM1-0026-000CN Output delivery assembly Reference figure 251 386 Parts and diagrams Q2431-90912 - HP 4300 | Service Manual - Page 407
Figure 252. Transfer assembly Q2431-90912 Table 102. Transfer assembly Part number Description RM1-0007-000CN Transfer assembly Reference figure 252 8 Parts and diagrams 387 - HP 4300 | Service Manual - Page 408
1 2 3 4 Figure 253. Fuser 388 Parts and diagrams Q2431-90912 - HP 4300 | Service Manual - Page 409
Table 103. Fuser Part number Description Q2425-69004 (exchange) Fuser, 110-V (LJ 4200) RM1-0013-000CN (new) Q2425-69005 (exchange) Fuser, 220-V (LJ 4200) RM1-0014-000CN (new) Q2431-69005 (exchange) Fuser, 110-V (LJ 4300) RM1-0101-000CN (new) Q2431-69006 (exchange) Fuser, 220-V (LJ 4300) RM1- - HP 4300 | Service Manual - Page 410
1 3 Figure 254. 500-sheet feeder external covers and panels Table 104. 500-sheet feeder external covers and panels Part number Description RC1-0488-000CN Cover, right; 500-sheet feeder RC1-0500-000CN Cover, number display panel; 500-sheet feeder RC1-0487-000CN Cover, left; - HP 4300 | Service Manual - Page 411
1 3 2 Figure 255. 500-sheet feeder main assemblies (1 of 2) Table 105. 500-sheet feeder main assemblies (1 of 2) Part number Description RG1-4201-000CN Cable, interface upper RG1-4202-000CN Cable, interface lower RM1-0041-000CN Media size sensor assembly; 500-sheet feeder Reference 1; - HP 4300 | Service Manual - Page 412
7 5 Figure 256. 6 500-sheet feeder main assemblies (2 of 2) 1 2 3 4 392 Parts and diagrams Q2431-90912 - HP 4300 | Service Manual - Page 413
Table 106. 500-sheet feeder main assemblies (2 of 2) Part number Description RG1-4250-000CN Cable, sensor assembly RH7-5355-000CN Solenoid, 500-sheet feeder RG1-4200-000CN PCA, 500-sheet feeder control RC1-0206-000CN Bushing, 500-sheet feeder RM1-0036-000CN Roller, paper pickup; 500- - HP 4300 | Service Manual - Page 414
Figure 257. 500-sheet feeder paper-pickup drive assembly Table 107. 500-sheet feeder paper-pickup drive assembly Part number Description RM1-0056-000CN Paper-pickup assembly; 500-sheet feeder Reference figure 257 394 Parts and diagrams Q2431-90912 - HP 4300 | Service Manual - Page 415
Figure 258. 500-sheet feeder lifter driver assembly Table 108. 500-sheet feeder lifter driver assembly Part number Description RM1-0208-000CN Lifter-driver assembly; 500-sheet feeder Reference figure 258 Q2431-90912 8 Parts and diagrams 395 - HP 4300 | Service Manual - Page 416
2 3 Figure 259. 500-sheet tray Table 109. 500-sheet tray Part number Description RC1-0161-000CN Flag, paper size sensor; 500-sheet feeder RM1-0030-000CN Rear tray assembly; 500-sheet tray 396 Parts and diagrams Reference 1; figure 259 2; figure 259 3; figure 259 4; figure 259 Q2431-90912 - HP 4300 | Service Manual - Page 417
1 2 3 4 6 5 Figure 260. 1500-sheet feeder external covers and panels Table 110. 1500-sheet feeder external covers and panels Part number Description RC1-0663-000CN Cover, rear; 1,500-sheet feeder RC1-0661-000CN Cover, right; 1,500-sheet feeder RM1-0273-000CN Cover, front (door assembly - HP 4300 | Service Manual - Page 418
2 1 3 4 8 Figure 261. 1,500-sheet feeder main assemblies 398 Parts and diagrams 5 7 6 Q2431-90912 - HP 4300 | Service Manual - Page 419
Table 111. 1,500-sheet feeder main assemblies Part number Description Reference VS1-6175-006CN Connector, interface; 1,500- feeder 6; figure 261 RG1-4238-000CN PCA, 1,500-sheet feeder control 7; figure 261 RM1-0286-000CN Sensor gear assembly, 1,500-sheet feeder 8; figure 261 Q2431- - HP 4300 | Service Manual - Page 420
Figure 262. 1,500-sheet feeder paper-pickup drive assembly Table 112. 1,500-sheet feeder paper-pickup drive assembly Part number Description RM1-0283-000CN Paper-pickup drive assembly, 1,500-sheet feeder Reference figure 262 400 Parts and diagrams Q2431-90912 - HP 4300 | Service Manual - Page 421
Figure 263. 1,500-sheet feeder lifter-drive assembly Table 113. 1,500-sheet feeder lifter-drive assembly Part number Description RM1-0287-000CN Lifter-drive assembly, 1,500-sheet feeder Reference figure 263 Q2431-90912 8 Parts and diagrams 401 - HP 4300 | Service Manual - Page 422
1 2 3 Figure 264. 1,500-sheet feeder paper-pickup assembly Table 114. 1,500-sheet feeder paper-pickup assembly Part number Description RM1-0285-000CN Paper sensor assembly, 1,500-sheet feeder RM1-0036-000CN Roller, pickup; 1,500-sheet feeder RM1-0037-000CN Roller, feed; 1,500- - HP 4300 | Service Manual - Page 423
. Stacker and stapler/stacker Table 115. Stacker and stapler/stacker Part number Description Q2443-67901 Cover, rear stacker and stapler/stacker Q2443-67902 Paper delivery tray assembly, stacker and stapler/stacker Reference 1; figure 265 2; figure 265 Q2431-90912 8 Parts and diagrams 403 - HP 4300 | Service Manual - Page 424
1 Figure 266. Stacker and stapler/stacker Table 116. Stacker and stapler/stacker Part number Description Q2443-67903 Staple module (stapler/stacker only) Q3216-60500 Staple cartridge stapler/stacker only) 404 Parts and diagrams Reference 1; figure 265 not shown Q2431-90912 - HP 4300 | Service Manual - Page 425
-6175-006CN Connector, interface; 1,500-sheet feeder 1; figure 261 RG1-4276-000CN Control panel 5; figure 237 RM1-0047-000CN Cover, cartridge door; LJ 4200 3; figure 237 RM1-0114-000CN Cover, cartridge door; LJ 4300 3; figure 237 RC1-0291-000CN Cover, duplexer 9; figure 237 RC1-0320 - HP 4300 | Service Manual - Page 426
110-V (LJ 4300) RM1-0101-000CN (new) Q2425-69005 (exchange) Fuser, 220-V (LJ 4200) RM1-0014-000CN (new) Q2431-69006 (exchange) Fuser, 220-V (LJ 4300) RM1-0102-000CN (new) RU5-0050-000CN Gear, 30T RC1-0244-000CN Guide right side power supply RC1-0270-000CN Guide, cable DC controller RC1-0269 - HP 4300 | Service Manual - Page 427
list (continued) Part number Description Reference RC1-0342-000CN Holder, plastic thermistor 13; figure 240 Q2425-69001 (exchange) Laser/scanner assembly (LJ 4200) RM1-0173-000CN (new) 1; figure 239 Q2431-690001 (exchange) Laser/scanner assembly (LJ 4300) RM1-0183-000CN (new) 1; figure 239 - HP 4300 | Service Manual - Page 428
117. Alphabetical pars list (continued) Part number Description RC1-0070-000CN Roller, fixing pressure RM1-0037-000CN Roller, paper -0198-000CN Spring, tension (lifter driver assembly) RC1-0061-000CN Spring, torsion Q3216-60500 Staple cartridge stapler/stacker only) Q2443-67903 Staple - HP 4300 | Service Manual - Page 429
220-V (LJ 4200) RM1-0020-000CN (new) Q2425-69004 (exchange) Fuser, 110-V (LJ 4200) RM1-0013-000CN (new) Q2425-69005 (exchange) Fuser, 220-V (LJ 4200) RM1-0014-000CN (new) Q2431-67908 LJ4300 name plate kit Q2431-690001 (exchange) Laser/scanner assembly (LJ 4300) RM1-0183-000CN (new) Q2431-69002 - HP 4300 | Service Manual - Page 430
Cover, fan (power supply shield) RC1-0385-000CN Guide, scanner cable 2 RC1-0386-000CN Guide, connector cable RC1-0487-000CN Cover, left; 500- fuser (LJ 4200) RG1-4212-000CN Cable, laser RG1-4213-000CN Cable, top cover RG1-4214-000CN Cable, top bin-ful RG1-4215-000CN Cable, control - HP 4300 | Service Manual - Page 431
Q2431-90912 Table 118. Numerical pars list (continued) Part number Description RG1-4224-000CN Cable, envelope feeder RG1-4231-000CN Cable, fuser (LJ 4300) RG1-4236-000CN PCA, DC controller (LJ 4200) RG1-4237-000CN PCA, DC controller (LJ 4300) RG1-4238-000CN PCA, 1,500-sheet feeder - HP 4300 | Service Manual - Page 432
; 500-sheet feeder figure 257 RM1-0103-000CN Fixing film, 110-V (LJ 4300) 2; figure 253 RM1-0104-000CN Fixing film, 220-V (LJ 4300) 2; figure 253 RM1-0114-000CN Cover, cartridge door; LJ 4300 3; figure 237 RM1-0208-000CN Lifter-driver assembly; 500-sheet feeder figure 258 RM1-0273 - HP 4300 | Service Manual - Page 433
features 3 product, part, and exchange numbers 364 removing and replacing 204 wiring diagrams 348 accounting information from usage page 239 acoustic ratings 8 adhesives on envelopes 17 on labels 16 agreements, service 29, 363 alerts configuring with EWS 244 generated from Printer Status and Alerts - HP 4300 | Service Manual - Page 434
-size sensor 391 500-sheet feeder sensor cable 393 brake, left 373 brake, right 373 control panel 157 duplexing pendulum 332, 380 fuser 333 illustration and part numbers 371 laser/scanner 76, 332 lifter-drive, printer 332 lifter-drive, 1,500-sheet feeder 341, 401 lifter-drive, 500-sheet feeder 339 - HP 4300 | Service Manual - Page 435
testing direct connect (parallel) 255 conserving power 127 toner 128 consumption power 7 toner 24 control panel access denied message 40 blank, troubleshooting 236, 238 buttons 37 connector 356 default settings 38 help system 37 illustration and part number 369 layout 36 lights 36 lock 241 messages - HP 4300 | Service Manual - Page 436
356 troubleshooting 286 DC controller assembly, order in which to remove 135 DC controller cable guide 371 DC controller PCA formatter operation 127 image formation operation 118 jam detection 87 location 338 operation 69 paper pickup and feed operation 79 part number 375 print cartridge memory - HP 4300 | Service Manual - Page 437
18 environmental print quality problems 307 specifications 5, 7 stewardship program 24 error messages alphabetical list 258 control panel 257 numerical list 274 See also messages error pages for PS 45 errors configuring printer reaction to 50 See also troubleshooting ESD (electrostatic discharge - HP 4300 | Service Manual - Page 438
for support and supplies 245 Networking tab 244 opening 243 requirements 243 setting language 244 Settings tab 244 using for troubleshooting 239, 243 viewing with Printer Status and Alerts 245 exchange numbers accessories and supplies 364 memory, fonts, and mass storage 365 printer maintenance kits - HP 4300 | Service Manual - Page 439
location 127, 128 part number 365 printing file directory 41 reformatting 252 write protected 259 heaters for fuser 71 heavy paper fuser modes 47 specifications 18 height of printer 6 held jobs description 41 settings 49 help control panel 37 See also support; troubleshooting Help button 36, 37 - HP 4300 | Service Manual - Page 440
LED PCA 347 LEDs on control panel 36 left covers. See covers left-side cover 151 lenses in laser/scanner operation 76 letter paper, override A4 45 letterhead fuser modes 47 print quality problems 306 specifications 14, 308 life expectancies components 59 print cartridges 31 lifter-drive assembly - HP 4300 | Service Manual - Page 441
agreements 29, 363 kits for printer 366 preventative maintenance notice 242 remaining life of kit components 242 setting count of pages printed 249 setting maintenance interval 249 See also cleaning malfunction error troubleshooting 330 manual feed settings 45, 49 manuals. See documentation margins - HP 4300 | Service Manual - Page 442
page orientation default 45 pages per minute (ppm) speed 8 panels. See covers paper common causes of jams 297 fuser modes 47 fusing compatibility 19 guidelines 9, 14 jam detection 87 override A4/letter setting 45 pickup and feed operation 78 print media guide for the HP LaserJet family of printers - HP 4300 | Service Manual - Page 443
and panels 369 main assemblies 371 memory, fonts, and mass storage 365 printer maintenance kits 366 PartnerCare 29, 363 partners HP Connect Online support website 362 HP Partner Care support 29 HP PartnerCare support 363 parts diagrams and lists 368 location of main 332 order in which to remove - HP 4300 | Service Manual - Page 444
on control panel 46 print servers. See HP Jetdirect print servers printer cabinet, locking 136 printer command language (PCL) 130 printer driver print quality problems 306 settings 40 printer job language (PJL) 130 printer languages. See personalities printer maintenance kits 366 printer management - HP 4300 | Service Manual - Page 445
, 84 troubleshooting defects 325 ROM (read-only memory) 129 rotation functional check 310 rotation of motors 70 rough paper, fuser modes 47 ruler for repetitive defects 325 S safety information laser/scanner assembly 133 print cartridge, toner, and laser/scanner assembly 20 scanner cable 1 guide 373 - HP 4300 | Service Manual - Page 446
completing checklists 133 PIN codes 249 service ID converting to an actual date 250 description 250 on configuration page 241 restoring 250 setting 249 Service menu on control panel 249 and cold reset 251 resetting values to factory defaults 251 service training kit 367 setting up alerts with EWS - HP 4300 | Service Manual - Page 447
Printer Status and Alerts 245 status and alerts software 243 status messages configuring with EWS 244 on control panel 257 readback to computer 52 storage cabinet, part number 364 storage devices. See hard disk accessory stored jobs description 41 settings 49 storing envelopes 18 print cartridges - HP 4300 | Service Manual - Page 448
voltage 72 operation 71 part number 375 thermistor holder 375 three-hole punched paper, fuser modes 47 timeouts held jobs 49 I/O settings 52 idle 52 timing diagrams 357 tray 1 80 tray 2 82 timing, cartridge memory 75 Token Ring network cards 365 toner adhesion, troubleshooting 14 application to - HP 4300 | Service Manual - Page 449
bias 73 transferring process 118, 123 transparencies fuser modes 47 print quality problems 306 specifications 10, 16 stapler/stacker support 13 stapling 16 troubleshooting 307 transport area errors 330 tray 1 components, life expectancies 59 illustration and part number 385 jam locations 295 jam - HP 4300 | Service Manual - Page 450
in images, troubleshooting 315 voltages monitoring in fuser 71 requirements 8 supply and conversion 74 W warnings configuring 50 messages on control panel 257 warranty proof 250 using service ID to verify 250 warranty statement print cartridge 33 printer 32 washers 134 washing toner off clothing 20 - HP 4300 | Service Manual - Page 451
- HP 4300 | Service Manual - Page 452
copyright © 2002 Hewlett-Packard Company http://www.hp.com *Q2431-90912* *Q2431-90912* Q2431-90912
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service
hp
hp
LaserJet 4200
LaserJet 4300
4200n
4200tn
4200dtn
4300n
4300tn
4300dtn
4300dtns
4300dtnsl
4200dtns
4200dtnsl