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LASERJET ENTERPRISE 500 COLOR
Service Manual
M551n M551dn M551xh
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HP LaserJet Enterprise 500 color M551 Printers Service Manual
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Copyright and License Trademark Credits ® ® © 2011 Copyright Hewlett-Packard ENERGY STAR and the ENERGY STAR Development Company, L.P. mark are registered U.S. marks. Reproduction, adaptation, or translation without prior written permission is prohibited, except as allowed under the copyright laws. The information contained herein is subject to change without notice. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and s
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Conventions used in this guide TIP: Tips provide helpful hints or shortcuts. NOTE: Notes provide important information to explain a concept or to complete a task. CAUTION: Cautions indicate procedures that you should follow to avoid losing data or damaging the product. WARNING! Warnings alert you to specific procedures that you should follow to avoid personal injury, catastrophic loss of data, or extensive damage to the product. ENWW iii
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iv Conventions used in this guide ENWW
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Table of contents 1 Theory of operation .......................................................................................................... 1 Basic operation ........................................................................................................................ 2 Sequence of operation ............................................................................................... 3 Engine control system .....................................................................
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Step 8: Fusing ......................................................................................... 26 Step 9: ITB cleaning ................................................................................. 27 Step 10: Drum cleaning ............................................................................ 27 Print cartridge ......................................................................................................... 27 Developing roller engagement and disengagement ...........
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Cautions during removal and replacement ................................................................. 70 Electrostatic discharge ............................................................................................. 71 Required tools ......................................................................................................... 72 Service approach ................................................................................................................... 73 Before per
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Remove the left bottom handle ................................................................. 114 Hardware integration pocket (HIP) (dn and xh models only) ....................................... 115 Control panel assembly ......................................................................................... 116 Right front cover .................................................................................................... 118 Remove the right front cover .............................
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Reinstall the high voltage power supply lower ............................. 169 Developing disengagement motor ........................................................................... 170 Remove the developing disengagement motor ........................................... 170 Pickup motor ........................................................................................................ 172 Remove the pickup motor ........................................................................
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3 Solve problems ............................................................................................................. 237 Solve problems checklist ....................................................................................................... 238 Menu map .......................................................................................................................... 240 Current settings pages ............................................................................
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Base product .......................................................................... 286 1 x 500 paper feeder .............................................................. 293 General timing chart ............................................................................... 294 Circuit diagrams .................................................................................... 295 Internal print-quality test pages ...........................................................................
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10.22.51 .............................................................................................. 393 10.22.52 .............................................................................................. 393 10.23.50 .............................................................................................. 393 10.23.51 .............................................................................................. 394 10.23.52 ...........................................................
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33.XX.YY Used board/disk ..................................................................... 412 41.02.00 Error ...................................................................................... 412 41.03.YZ Unexpected size in tray ..................................................... 413 41.05.YZ Unexpected type in tray .................................................... 413 41.07.YZ Error To continue, press OK ...................................................... 415 42.XX.YY .
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99.00.07 Upgrade not performed error reading upgrade ........................... 435 99.00.08 Upgrade not performed error reading upgrade ........................... 435 99.00.09 Upgrade canceled by user ....................................................... 435 99.00.10 Upgrade canceled by user ....................................................... 436 99.00.11 Upgrade canceled by user ....................................................... 436 99.00.12 Upgrade not performed the file is inval
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Close front door ..................................................................................... 446 Close lower right door ............................................................................ 446 Close upper right door ............................................................................ 446 Creating cleaning page .......................................................................... 446 Data received To print last page, press OK ........................................
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Printing Menu Map... ............................................................................. 456 Printing PQ Troubleshooting... ................................................................. 456 Printing Registration Page... ..................................................................... 456 Printing RGB Samples... .......................................................................... 456 Printing stopped ........................................................................
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View an event log .................................................................................. 470 Clear an event log .................................................................................. 470 Clear jams .......................................................................................................................... 471 Common causes of jams ........................................................................................ 471 Jam locations ......................
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Execute a Clean Disk ............................................................... 512 Preboot menu options ........................................................................................................... 514 Product updates ................................................................................................................... 521 Determine the installed revision of firmware .............................................................. 521 Perform a firmware upgrade ...
