User ManualTable of ContentsTheory of operation15Basic operation16Major printer systems16Printer block diagram16Sequence of operation17Normal sequence of operation17Formatter-control system18Sleep mode18Input/output18CPU18Memory19Optional hard disk19Firmware19Nonvolatile memory19PJL overview19PML19Control panel19Engine-control system20Motors, fans, clutches, solenoids, switches, and sensors21DC controller operations28Fuser-control circuit30Fuser failure detection31Fuser temperature control32Fuser protective function33Low-voltage power supply34Overcurrent/overvoltage protection35High-voltage power supply36Formatter37Formatter heartbeat LED37DIMM slots37Laser/scanner system38Laser failure detection39Image-formation system40Electrophotographic process40Image formation process41Latent-image formation stage42Primary charging42Laser beam exposure42Developing stage43Print cartridge43Transfer stage44Fusing stage44Cleaning stage45Toner detection46Pickup, feed, and delivery system47Paper trays47Photo sensors and switches48Solenoids and clutches50Tray 1 or Tray 252Pickup and feed unit52Cassette paper size detection/cassette paper detection52Cassette pickup52Tray 1 paper pickup52Paper pickup and feed53Jam detection54Additional tray55Tray driver PCA55Paper pickup and feed56Media level and size detection57Jam detection57Removal and replacement59Removal and replacement strategy60General cautions during removal and replacement60Electrostatic discharge60Required tools60Types of screws61Service approach62Before performing service62After performing service62Post-service test62Print-quality test62Parts removal order64Removal and replacement procedures66Print cartridge, cassettes, and sub cover66Print cartridge66Tray cassette (Tray 2, Tray 3, or Tray 4)68Sub cover69External panels, covers, doors, formatter PCA, DIMM, and EIO disk70EIO disk70DIMM cover and DIMM71Reinstall the DIMM72Formatter cover and formatter PCA74Rear-door assembly76Left cover80Right-rear cover82Tray 1 (multipurpose tray) cover83Cartridge-door assembly85Top-right cover87Control panel88Front-right and right-side cover assembly90Lower-right cover and bracket94Reinstall the lower-right cover96Top cover98Main assemblies100Tray 1 (multipurpose tray) pickup roller100Tray 1 (multipurpose tray) separation pad101Tray 2, Tray 3, or Tray 4 pickup roller102Tray 2, Tray 3, or Tray 4 separation pad104Tray 2, Tray 3, or Tray 4 base-plate roller assembly105Transfer roller106USB port PCA108Power-switch assembly110Main fan, fan duct, and environmental sensor112Fuser114Registration assembly116Duplex media-feed assembly118Laser/scanner121Engine control unit (ECU)124Cassette pickup (Tray 2) solenoid or Tray 1 (multipurpose tray) pickup solenoid129Fuser motor131Sub fan and fan duct132High-voltage power supply (HVPS)135Solve problems141Solve problems checklist142Menu map144Troubleshooting process145Determine the problem source145Power subsystem146Power-on checks146Tools for troubleshooting147Individual component diagnostics147LED diagnostics147LED indicators147Formatter heartbeat LED147HP Jetdirect LEDs148Engine diagnostics148Engine-test button148Fuser test page149Paper-path test (and automatic sensors test)150Sensor test (interactive)151A TOP (Top-of-Page) sensor154B Fuser output sensor155C Duplex sensor156D Paper width sensor 1157E Tray 3 feed sensor158F Tray 4 feed sensor159G FD tray full sensor160H Face up detect sensor161I Cartridge-door open switch162J Rear cover open sensor163K Tray 1 paper sensor164L Tray 2 paper sensor165M Tray 2 detect switch166N Tray 3 paper sensor167O Tray 3 detect switch168P Tray 4 paper sensor169Q Tray 4 detect switch170Print/stop test171Component tests172Half self-test172Drum rotation test check172Diagnostics menu components test172Diagrams174Block diagrams174Plug/jack locations176Location of connectors177ECU controller connections177Locations of major components179General timing charts183General circuit diagram184Internal print quality test pages186Cleaning page186Configuration page186Print quality troubleshooting tools187Repetitive image-defect ruler187Control-panel menus188Use the menus188Show Me How menu188Retrieve job menu189Information menu190Paper handling menu191Manage supplies menu191Configure device menu192Printing menu192PCL sub-menu193Print Quality menu194System setup menu197I/O menu201Embedded Jetdirect and EIO <X> Jetdirect menus201Resets menu208Diagnostics menu208Service menu210Interpret control-panel messages211Control-panel message types211Control-panel messages211Event-log messages229Print an event log229Show an event log229Sample event-log page230Clear an event log230Event-log messages231Clear jams233Common causes of jams233Jam locations234Clear jams from the input trays236Clear jams from the duplexer240Clear jams from the output areas245Clear jams from inside the product248Registration and transfer area248Jam causes and solutions250Avoid repeated jams254Change jam recovery255Solve paper-handling problems256Product feeds multiple sheets256Product feeds incorrect page size256Product pulls from incorrect tray257Paper does not feed automatically257Paper does not feed from Tray 2, 3, or 4258Transparencies or glossy paper will not feed258Envelopes jam or will not feed in the product259Output is curled or wrinkled259Product does not duplex or duplexes incorrectly (duplex models)260Solve image-quality problems261Image defect examples261Clean the product268Solve performance problems271Solve connectivity problems272Solve direct-connect problems272Solve network problems272Service mode functions273Service menu273Product resets274Restore factory settings274Hard disk initialization274Skip disk-load274NVRAM initialization274Service ID275Restore service ID275Convert the service ID to an actual date275Reset serial number276Reset page counts276Product cold reset276Product updates277Determine the current firmware version277Download new firmware from the HP Web site277Transfer the new firmware to the product277Use the flash executable file to update the firmware277Use FTP to upload the firmware through a browser278Use FTP to upgrade the firmware on a network connection278Use HP Web Jetadmin to upgrade the firmware279Use Microsoft Windows commands to upgrade the firmware279Upgrade the HP Jetdirect firmware279Parts and diagrams281Order parts by authorized service providers282Order parts, accessories, and supplies282Related documentation and software282Supplies part numbers282Accessories part numbers283Whole-unit replacement part numbers284How to use the parts lists and diagrams285Assembly locations286Base product (no optional trays or accessories)286Base product (optional trays or accessories)287Covers288Internal assemblies (1 of 6)290Internal assemblies (2 of 6)292Internal assemblies (3 of 6)294Internal assemblies (4 of 6)296Internal assemblies (5 of 6)298Internal assemblies (6 of 6)300Input devices302500-sheet input tray (Tray 3 and Tray 4)302Alphabetical parts list304Numerical parts list307Service and support311Hewlett-Packard limited warranty statement312HP's Premium Protection Warranty: LaserJet print cartridge limited warranty statement313End User License Agreement314Customer self-repair warranty service316Customer support317Repack the product318Service information form319Specifications321Physical specifications322Electrical specifications322Acoustic specifications322Environmental specifications323Regulatory information325FCC regulations326Environmental product stewardship program327Protecting the environment327Ozone production327Power consumption327Toner consumption327Paper use327Plastics327HP LaserJet print supplies327Return and recycling instructions328United States and Puerto Rico328Multiple returns (more than one cartridge)328Single returns328Shipping328Residents of Alaska and Hawaii328Non-U.S. returns328Paper328Material restrictions329Disposal of waste equipment by users in private households in the European Union329Chemical substances329Material Safety Data Sheet (MSDS)330For more information330Declaration of conformity331Safety statements332Laser safety332Canadian DOC regulations332VCCI statement (Japan)332Power cord statement (Japan)332EMC statement (Korea)332Laser statement for Finland333Substances Table (China)334Index335Size: 18.4 MBPages: 342Language: EnglishOpen manual