Present Service Manual contain: Repair Manual and Troubleshooting Manual HP LaserJet Pro 400 MFP M425;
This manual is in the PDF format and have detailed Diagrams, pictures and full procedures to diagnose and repair your HP LaserJet Pro. You can print, zoom or read any diagram, picture or page from this Service Manual. Every chapter on this manual is fully detailed and contain all the simulation codes, trouble codes, maintenance procedures, reset procedures, diagnose procedures of HP LaserJet Pro 400 MFP M425 photocopier. You can find easily everything what do you need. To see what contain, please read table of contents:
Content for TROUBLESHOOTING MANUAL:
SOLVE PROBLEMS Solve problems checklist Menu map Troubleshooting process Pre-troubleshooting checklist Determine the problem source Power subsystem Power-on checks Control-panel checks Tools for troubleshooting Component diagnostics LED diagnostics Network LEDs Control panel LEDs Engine diagnostics Engine test Diagrams Plug/jack locations Locations of major components General timing chart General circuit diagrams Use HP Device Toolbox (Windows) Internal print-quality test pages Clean the paper path Print the configuration page Print-quality troubleshooting tools Repetitive image defect ruler Control panel menus HP Web Services menu Reports menu Quick Forms menu USB Flash Drive menu System Setup menu Service menu Network Setup menu Interpret control-panel messages Control panel message types Control panel messages 49 Error, Turn off then on 50.x Fuser Error 51.XX Error 54.XX Error 55.X Error 57 Fan Error, Turn off then on 59.X Error 79 Error Turn off then on 79 Service error Black cartridge low Black cartridge very low Cleaning Communication error Device error, press OK Document feeder door is open. Canceled fax Door open Fax is busy. Canceled send Fax is busy. Redial pending Fax receive error Fax Send error Fax storage is full. Canceling the fax receive Fax storage is full. Canceling the fax receive Fax storage is full. Canceling the fax send Genuine HP supply installed Incompatible black Install black cartridge Invalid driver Press [OK] Jam in Tray 1, Clear jam and then press OK Load Tray 1 , Press OK to use available media Load Tray 1, / Cleaning mode, OK to start Load tray Press [OK] for available media Load tray Manual Duplex Load Tray 1, Press OK Manual feed , Press OK to use available media Memory is low. Press OK Misprint, Press OK No dial tone No fax answer. Canceled send No fax answer. Redial pending No fax detected Print failure, press OK. If error repeats, turn off then on Rear door open Remove shipping material from toner cartridge Replace black cartridge Unexpected size in tray Load Press [OK] Unsupported black cartridge Press [OK] to continue Used black cartridge is installed Press [OK] to continue Event-log messages Print the event log Show an event log Event log messages Clear jams Jam locations Clear jams from the document feeder Clear a jam in Tray 1 Clear a jam in Tray 2 Clear a jam in optional Tray 3 Clear jams from the output bin Clear a jam in the duplexer area Clear a jam in the fuser area Solve paper-handling problems The product picks up multiple sheets of paper The product does not pick up paper Solve image quality problems Print quality examples Clean the product Clean the pickup and separation rollers Clean the paper path Clean the scanner glass strip and platen Clean the document feeder pickup rollers and separation pad Clean the touchscreen Solve performance problems Factors affecting print performance Print speeds The product does not print or it prints slowly The product does not print The product prints slowly Solve connectivity problems Solve direct-connect problems Solve network problems Poor physical connection The computer is using the incorrect IP address for the product The computer is unable to communicate with the product The product is using incorrect link and duplex settings for the network New software programs might be causing compatibility problems The computer or workstation might be set up incorrectly The product is disabled, or other network settings are incorrect Solve wireless network problems Wireless connectivity checklist The control panel displays the message: The wireless feature on this product has been turned off The product does not print after the wireless configuration completes The product does not print, and the computer has a third-party firewall installed The wireless connection does not work after moving the wireless router or product Cannot connect more computers to the wireless product The wireless product loses communication when connected to a VPN The network does not appear in the wireless networks list The wireless network is not functioning Service mode functions Service menu Service menu settings Restore the factory-set defaults Secondary service menu Open the secondary service menu Secondary service menu structure Product resets NVRAM initialization Super NVRAM initialization Solve fax problems Fax troubleshooting checklist Solve problems receiving faxes The fax does not respond The fax has a dedicated phone line An answering machine is connected to the product A telephone handset is connected to the product The Answer Mode setting is set to the Manual setting Voice mail is available on the fax line The product is connected to a DSL phone service The product uses a fax over IP or VoIP phone service An error message displays on the control panel The No fax detected. message displays The Communication error. message displays The Fax storage is full. message displays The Fax is busy. message displays A fax is received but does not print The Private Receive feature is on Sender receives a busy signal A handset is connected to the product A phone line splitter is being used No dial tone Fax cuts off or prints on two pages Solve problems sending faxes An error message displays on the control panel The Communication error. message displays No dial tone The Fax is busy. message displays The No fax answer. message displays Document feeder paper jam The Fax storage is full. message displays Scanner error The control panel displays a Ready message with no attempt to send the fax The control panel displays the message “Storing page 1” and does not progress beyond that message Faxes can be received, but not sent Unable to use fax functions from the control panel Unable to use speed dials Unable to use group dials Receive a recorded error message from the phone company when trying to send a fax Unable to send a fax when a phone is connected to the product Solve fax performance problems Faxes are sending slowly Fax quality is poor Solve DSL problems Cannot send or receive a fax on a PBX line Manually update the firmware
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THEORY OF OPERATION
Basic operation Major product systems Product components Sequence of operation Engine control system DC controller Motor control Fan control High-voltage power supply Fuser control circuit Fuser temperature control Fuser protection function Fuser failure detection Low-voltage power supply Protective function Safety Low-voltage power supply unit failure detection Laser scanner system Laser failure detection Image-formation system Image-formation process Latent-image formation stage Step 1: Primary charging Step 2: Laser-beam exposure Developing stage Step 3: Development Transfer stage Step 4: Transfer Step 5: Separation Fusing stage Step 6: Fusing Drum cleaning stage Step 7: Drum cleaning Pickup and feed system Jam detection Paper feeder (optional Tray 3) Paper feeder operation Jam detection Scanner system Scanner power-on sequence of events Copy or scan sequence of events Fax functions and operation Computer and network security features PSTN operation Receive faxes when you hear fax tones Distinctive ring function Use fax with voice over IP services The fax subsystem Fax card in the fax subsystem Safety isolation Safety-protection circuitry Data path Hook state Downstream device detection Hook switch control Ring detect Line current control Billing- (metering-) tone filters Fax page storage in flash memory Stored fax pages Advantages of flash memory storage USB flash drive
Appendix A: Service and support
Hewlett-Packard limited warranty statement HP’s Premium Protection Warranty: LaserJet toner cartridge limited warranty statement HP policy on non-HP supplies HP anticounterfeit Web site Data stored on the toner cartridge End User License Agreement OpenSSL Customer support Repack the product Hp Laserjet Pro 400 M425dn Repair Manual
Appendix B: Product specifications
Physical specifications Power consumption, electrical specifications, and acoustic emissions Environmental specifications
Appendix C: Regulatory information
FCC regulations Environmental product stewardship program Protecting the environment Ozone production Power consumption Toner consumption Paper use Plastics HP LaserJet print supplies Return and recycling instructions United States and Puerto Rico Multiple returns (more than one cartridge) Single returns Shipping Non-U.S. returns Paper Material restrictions Disposal of waste equipment by users Electronic hardware recycling Chemical substances Material Safety Data Sheet (MSDS) For more information Declaration of conformity Declaration of conformity Safety statements Laser safety Canadian DOC regulations VCCI statement (Japan) Power cord instructions Power cord statement (Japan) EMC statement (Korea) Laser statement for Finland GS statement (Germany) Substances Table (China) Restriction on Hazardous Substances statement (Turkey) Restriction on Hazardous Substances statement (Ukraine) Additional statements for telecom (fax) products EU Statement for Telecom Operation New Zealand Telecom Statements Additional FCC statement for telecom products (US) Telephone Consumer Protection Act (US) Industry Canada CS-03 requirements Vietnam Telecom wired/wireless marking for ICTQC Type approved products Additional statements for wireless products FCC compliance statement – United States Australia statement Brazil ANATEL statement Canadian statements European Union regulatory notice Notice for use in France Notice for use in Russia Mexico statement Korean statement Taiwan statement Vietnam Telecom wired/wireless marking for ICTQC Type approved products INDEX Hp Laserjet 400 Mfp M425dn User Manual
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Hp Laserjet Pro 400 M425dn Driver Windows 7
Content for REPAIR MANUAL:
1. REMOVAL AND REPLACEMENT Removal and replacement strategy Electrostatic discharge Required tools Types of screws Service approach Before performing service After performing service Post-service test Print-quality test Parts removal order Removal and replacement procedures Rollers Multipurpose (MP) tray pickup roller Multipurpose (MP) tray separation pad Tray 2 and optional Tray 3 pickup roller Tray 2 and optional Tray 3 separation pad Document feeder rollers Document feeder separation pad Covers, scanner assembly, and control panel Left cover Scanner assembly Control panel Right cover Top cover Rear cover, rear door, and feed assembly Cartridge door and front cover assembly Main assemblies Laser scanner assembly Registration assembly Fuser assembly and paper feed guide Duplex drive assembly Solenoids Tray 1 solenoid Duplex solenoid Motors and fans Main motor Fan Printed circuit-board assemblies (PCAs) Engine controller assembly (DC controller) PCA Universal serial bus (USB) PCA Formatter PCA Wireless PCA Fax PCA Power switch PCA Connecting PCA Miscellaneous parts Transfer roller Multipurpose (MP) tray pickup gear assembly Document feeder assembly Optional paper feeder (Tray 3) Optional paper feeder right cover Optional paper feeder driver PCA Optional paper feeder paper sensor PCA Hp Laserjet Mfp 400 M425dn Driver
2. PARTS AND DIAGRAMS
Order parts by authorized service providers Order replacement parts Related documentation and software Supplies part numbers Whole-unit replacement part numbers How to use the parts lists and diagrams Assembly locations Main unit Optional paper feeder Covers, panels, and doors Internal assemblies Scanner and document feeder Input devices 500-sheet paper feeder Paper feeder covers Paper feeder main body (1 of 2) Paper feeder main body (2 of 2) Alphabetical parts list Numerical parts list INDEX
HP LaserJet Pro400 HP LJ Pro400 MFPM425
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