HP LaserJet Enterprise 700 color MFP M775 Service Repair Manual

LASERJET ENTERPRISE 700 COLOR MFP Repair Manual M775dn M775f M775z M775z+

HP LaserJet Enterprise 700 color MFP M775 Repair Manual

Copyright and License © 2012 Copyright Hewlett-Packard Development Company, L.P. 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 services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein. Part number: CC522-90967 Edition 1, 10/2012 Trademark Credits Microsoft®, Windows®, Windows® XP, and Windows Vista® are U.S. registered trademarks of Microsoft Corporation.

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

iv Conventions used in this guide ENWW

Table of contents 1 Removal and replacement ................................................................................................ 1 Removal and replacement strategy ............................................................................................. 2 Cautions during removal and replacement ................................................................... 2 Required tools ........................................................................................................... 3 Types of screws ........................................................................................................ 3 Service approach ...................................................................................................... 3 Before performing service .......................................................................................... 4 After performing service ............................................................................................. 4 Parts removal order ................................................................................................... 4 Control-panel assembly ............................................................................................................. 5 Intermediate transfer belt ........................................................................................................... 7 Fuser ...................................................................................................................................... 9 Formatter PCA ....................................................................................................................... 10 Hard disk drive (HDD) ............................................................................................................ 11 Reinstall the HDD .................................................................................................... 12 Secondary transfer roller ......................................................................................................... 13 Document feeder mylar strips ................................................................................................... 14 Install replacement document feeder mylar strips ......................................................... 15 Document feeder foam reflector ............................................................................................... 16 Install a replacement document feeder foam reflector ................................................... 17 Pickup, feed, and separation (rollers and pads) ......................................................................... 22 Tray 1 (multipurpose tray) pickup roller ...................................................................... 22 Tray 1 separation pad ............................................................................................. 24 Tray 2 pickup roller ................................................................................................. 26 Tray 2 separation roller ........................................................................................... 27 1 x 500 or 3 x 500 pickup, feed, and separation rollers ............................................. 29 High capacity input feeder pickup, feed, and separation rollers .................................... 30 Document feeder pickup and feed roller assembly ....................................................... 32 Document feeder separation pad .............................................................................. 34 Reinstall the document feeder separation pad .............................................. 35 Covers, doors, and whole unit replacement ............................................................................... 36 Document feeder front cover ..................................................................................... 36 ENWW v

Document feeder hatch cover ................................................................................... 41 Document feeder input tray bottom cover ................................................................... 42 Document feeder roller cover .................................................................................... 43 Remove the document feeder roller cover .................................................... 43 Document feeder rear cover ..................................................................................... 46 Remove the document feeder rear cover ...................................................... 46 Scanner left cover ................................................................................................... 49 Remove the scanner left cover .................................................................... 49 Scanner right cover ................................................................................................. 51 Remove the scanner right cover .................................................................. 51 Scanner front cover ................................................................................................. 53 Remove the scanner front cover .................................................................. 53 Reinstall the scanner front cover ................................................................. 55 Left cover ............................................................................................................... 57 Rear cover ............................................................................................................. 58 Right rear cover ...................................................................................................... 59 Remove the right rear cover ....................................................................... 59 Toner collection unit (TCU) access door ...................................................................... 60 Remove the TCU access door ..................................................................... 60 Right door assembly ................................................................................................ 62 Remove the right door assembly ................................................................. 62 Rear upper cover .................................................................................................... 66 Right upper cover .................................................................................................... 67 Scanner rear and FFC bezel cover ............................................................................ 68 Stapler/stacker rear cover ........................................................................................ 69 Document feeder ..................................................................................................... 71 Remove the document feeder assembly ....................................................... 71 Reinstall the document feeder ..................................................................... 73 Scanner assembly ................................................................................................... 74 Remove the scanner assembly .................................................................... 74 Reinstall the scanner assembly ................................................................... 77 Stapler/stacker assembly ......................................................................................... 78 Remove the stapler/stacker assembly .......................................................... 78 Left upper cover ...................................................................................................... 82 Remove the left upper cover ....................................................................... 82 Front upper cover .................................................................................................... 83 Remove the front upper cover; stapler/stacker model .................................... 83 Remove the front upper cover; non stapler/stacker model .............................. 85 Front right cover ...................................................................................................... 86 Remove the front right cover ...................................................................... 86 Front door assembly ................................................................................................ 88 vi ENWW

Remove the front door assembly ................................................................. 88 Top right cover ....................................................................................................... 91 Remove the top right cover ........................................................................ 91 Output cover; non stapler/stacker model .................................................................... 93 Remove the output cover ........................................................................... 93 Top cover ............................................................................................................... 95 Remove the top cover ............................................................................... 95 Top rear cover ........................................................................................................ 97 Remove the top rear cover ......................................................................... 97 Main assemblies .................................................................................................................. 101 Document feeder paper present sensor .................................................................... 101 Remove the document feeder paper present sensor ..................................... 101 Document feeder hinge .......................................................................................... 103 Remove the document hinge .................................................................... 103 Document feeder width sensor, paper-long and paper-short sensors ............................. 105 Remove the document feeder width sensor, paper-short and paper-long sensors ................................................................................................. 105 Document feeder tray extender ............................................................................... 108 Remove the document tray extender ......................................................... 108 Sub-power supply assembly .................................................................................... 110 Remove the power supply assembly .......................................................... 110 Sub power supply fan FM5 .................................................................................... 112 Remove the sub power supply fan FM5 ..................................................... 112 Lifter-drive assembly .............................................................................................. 115 Remove the lifter-drive assembly ............................................................... 115 ITB front guide assembly ........................................................................................ 118 Remove the ITB front guide assembly ........................................................ 119 ITB rear guide assembly ......................................................................................... 121 Remove the ITB rear guide assembly ......................................................... 121 Residual toner full sensor ........................................................................................ 122 Remove the residual toner full sensor ........................................................ 122 Reinstall the residual toner full sensor ......................................... 125 Residual toner feed assembly .................................................................................. 127 Remove the residual toner feed assembly .................................................. 128 Paper delivery assembly ........................................................................................ 131 Remove the paper delivery assembly ........................................................ 131 Laser scanner ....................................................................................................... 133 Remove the laser/scanner assembly ......................................................... 133 Cartridge fan FM4 ................................................................................................ 137 Remove the cartridge fan FM4 ................................................................. 137 Fuser fan FM2 ...................................................................................................... 139 ENWW vii

Remove the fuser fan FM2 ....................................................................... 139 Formatter fan FM3 ................................................................................................ 141 Remove the formatter fan FM3 ................................................................. 141 ITB motor M1 ....................................................................................................... 143 Remove the ITB motor M1 ....................................................................... 143 Drum motor M2 .................................................................................................... 145 Remove the drum motor M2 .................................................................... 145 Developing motor M3 ............................................................................................ 147 Remove the developing motor M3 ............................................................ 147 Fuser motor M4 .................................................................................................... 149 Remove the fuser motor M4 ..................................................................... 149 Developing disengagement motor M6 ..................................................................... 151 Remove the developing disengagement motor M6 ...................................... 151 Power-supply fan FM1 ........................................................................................... 153 Remove the power-supply fan FM1 ........................................................... 153 Power switch ........................................................................................................ 155 Remove the power switch ........................................................................ 155 Environment sensor ................................................................................................ 157 Scan control board (SCB) ....................................................................................... 158 Remove the scan control board (SCB) ....................................................... 158 Reinstall the SCB .................................................................................... 160 Installing a replacement SCB and image scanner memory board ................. 160 Document feeder open sensor and flag .................................................................... 161 Remove the document open sensor and flag .............................................. 161 Reinstall the document feeder open sensor and flag .................................... 163 Image scanner memory board ................................................................................ 164 Remove the image scanner memory board ................................................ 164 Installing a replacement SCB and image scanner memory board ................. 165 Fax PCA .............................................................................................................. 166 Remove the fax PCA ............................................................................... 166 Reinstall the fax PCA .............................................................................. 167 Image (developing) high-voltage power supply (HVPS) ............................................... 168 Remove the image (developing) high-voltage power supply ......................... 168 Reinstall the image (developing) high-voltage power supply ......................... 170 Interconnect PCA .................................................................................................. 171 Remove the interconnect PCA .................................................................. 171 DC controller PCA ................................................................................................. 174 Remove the DC controller PCA ................................................................. 174 Formatter cage ..................................................................................................... 177 Remove the formatter cage ...................................................................... 177 First-transfer high-voltage power supply .................................................................... 179 viii ENWW

HP LaserJet Enterprise 700 color MFP M775 Service Repair Manual

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