HP LaserJet Enterprise 600 M601, M602, M603 Series Printer Service Repair Manual

LASERJET ENTERPRISE 600 M601, M602, AND M603 SERIES PRINTER Service Manual

HP LaserJet Enterprise 600 M601, M602, and M603 Series Printer Service Manual

Copyright and License © 2011 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: CE988-90945 Edition 1, 11/2011 Trademark Credits ENERGY STAR and the ENERGY STAR mark are registered U.S. marks.

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 Theory of operation .......................................................................................................... 1 Basic operation ........................................................................................................................ 2 Major print systems ................................................................................................... 2 Internal components .................................................................................................. 3 Operating sequence .................................................................................................. 7 Formatter system ...................................................................................................................... 8 Sleep mode .............................................................................................................. 8 Input/output ............................................................................................................. 8 USB .......................................................................................................... 8 Embedded print server ................................................................................ 9 Hard-disk .................................................................................................. 9 CPU ......................................................................................................... 9 Memory ................................................................................................................... 9 Random-access memory .............................................................................. 9 Nonvolatile memory ................................................................................... 9 DIMM slot ................................................................................................................ 9 PJL overview ........................................................................................................... 10 PML ....................................................................................................................... 10 Control panel ......................................................................................................... 10 Engine-control system .............................................................................................................. 11 DC controller PCA ................................................................................................... 12 Sensors, solenoids, and switches ............................................................................... 13 Motors and fans ...................................................................................................... 14 Failure detection ...................................................................................... 14 Motor failure ............................................................................ 14 Fan motor failure ....................................................................... 14 Engine power supply ................................................................................ 15 Fuser-control circuit .................................................................... 15 Low-voltage power supply .......................................................... 17 High-voltage power supply ......................................................... 18 Overcurrent/overvoltage protection ............................................. 19 Image-formation system ........................................................................................................... 20 ENWW v

Image-formation process .......................................................................................... 21 Block 1: Latent image formation ................................................................. 23 Step 1: Primary charging ........................................................... 23 Step 2: Laser-beam exposure ...................................................... 23 Block 2: Developing ................................................................................. 24 Step 3: Developing .................................................................... 24 Block 3: Transfer ...................................................................................... 25 Step 4: Transfer ........................................................................ 25 Step 5: Separation .................................................................... 25 Block 4: Fusing ........................................................................................ 26 Step 6: Fusing ........................................................................... 26 Block 5: Drum cleaning ............................................................................. 27 Step 7: Drum cleaning ............................................................... 27 Step 8: Drum charge elimination ................................................. 27 Laser/scanner system ............................................................................................................. 28 Laser failure detection .............................................................................................. 30 Pickup, feed, and delivery system ............................................................................................. 31 Pickup-and-feed block .............................................................................................. 32 Fuser/delivery block ................................................................................................ 33 Pressure roller pressure release control ....................................................................... 33 Paper trays ............................................................................................................. 34 Printing from Tray 1 .................................................................................. 34 Printing from Tray 2 .................................................................................. 34 Cassette media size detection and cassette presence detection ...................... 34 Jam detection ......................................................................................................... 36 1x500-sheet paper feeder ....................................................................................................... 40 Pickup-and-feed operation (PF) .................................................................................. 41 Cassette lift operation (PF) ........................................................................................ 43 Cassette media size detection and cassette presence detection (PF) ............................... 43 Cassette multiple-feed prevention (PF) ........................................................................ 43 Jam detection (PF) ................................................................................................... 43 1x1500-sheet paper deck ....................................................................................................... 44 Pickup-and-feed operation (PD) ................................................................................. 45 Cassette lift operation (PD) ....................................................................................... 47 Media size detection (PD) ........................................................................................ 48 Multiple-feed prevention (PD) .................................................................................... 48 Jam detection (PF) ................................................................................................... 48 Envelope feeder ..................................................................................................................... 49 Pickup-and-feed operation (EF) .................................................................................. 50 Multiple-feed prevention (EF) ..................................................................................... 50 Multiple-feed detection (EF) ....................................................................................... 51 vi ENWW

Jam detection (EF) ................................................................................................... 51 Duplexer ............................................................................................................................... 53 Motor and fan control (DP) ....................................................................................... 54 Failure detection (DP) ................................................................................ 55 Reverse-and-re-pickup operation (DP) ......................................................................... 55 Side registration adjustment operation (DP) ................................................................ 56 Jam detection (DP) ................................................................................................... 58 2 Removal and replacement .............................................................................................. 59 Introduction ........................................................................................................................... 60 Removal and replacement strategy ........................................................................................... 60 Electrostatic discharge ............................................................................................................ 60 Required tools ........................................................................................................................ 61 Types of screws ..................................................................................................................... 62 Service approach ................................................................................................................... 63 Before performing service ........................................................................................ 63 After performing service ........................................................................................... 63 Post-service test ....................................................................................................... 63 Print-quality test ........................................................................................ 63 Customer replaceable units (CRUs) ........................................................................................... 64 Print cartridge ......................................................................................................... 64 Tray 2 ................................................................................................................... 65 Tray 2 separation, pickup, and feed rollers ................................................................ 66 Transfer roller ........................................................................................................ 69 Fuser ..................................................................................................................... 70 Remove the fuser ...................................................................................... 70 Formatter cover and formatter cage ........................................................................... 71 Installing a new formatter .......................................................................... 73 Hard drive ............................................................................................................. 74 Remove the SSM ...................................................................................... 74 Remove the encrypted HHD ....................................................................... 76 Installing a replacement hard drive ............................................................. 78 SSM firmware upgrade .............................................................. 78 HDD firmware upgrade .............................................................. 79 Memory DIMM ....................................................................................................... 80 Remove the memory DIMM ....................................................................... 80 Install the memory DIMM ........................................................................... 81 Tray 1 pickup and feed rollers .................................................................................. 82 Tray 1 separation roller ........................................................................................... 85 Rear output bin ....................................................................................................... 87 Covers .................................................................................................................................. 88 ENWW vii

Top-accessory cover ................................................................................................ 88 Envelope feed accessory covers ................................................................................ 89 Duplex accessory or cover ....................................................................................... 90 Tray 2 extension door .............................................................................................. 91 Remove the Tray 2 extension door .............................................................. 91 Top cover ............................................................................................................... 92 Remove the top cover ............................................................................... 92 Right-side cover ....................................................................................................... 95 Remove the right-side cover ....................................................................... 95 Reinstall the right cover ............................................................................. 97 Left-side cover ......................................................................................................... 98 Remove the left-side cover ......................................................................... 98 Right-front cover .................................................................................................... 100 Remove the right-front cover ..................................................................... 100 Rear-upper cover ................................................................................................... 103 Remove the rear-upper cover ................................................................... 103 Front cover ........................................................................................................... 105 Remove the front cover ............................................................................ 105 Main assemblies .................................................................................................................. 107 Registration assembly ............................................................................................ 107 Control-panel assembly .......................................................................................... 109 Remove the control-panel assembly ........................................................... 109 Walk-up USB port and cable .................................................................................. 111 Remove the walk-up USB port and cable ................................................... 111 Inner connecting PCA ............................................................................................ 114 Remove the inner connecting PCA ............................................................ 114 Reinstall the inner connecting PCA ........................................................... 116 Fan FN102 .......................................................................................................... 117 Remove fan FN102 ................................................................................ 117 Fan FN103 .......................................................................................................... 119 Remove fan FN103 ................................................................................ 119 Pickup-motor assembly (M101) ............................................................................... 121 Remove the pickup-motor assembly ........................................................... 121 Drum-motor assembly (M102) ................................................................................. 123 Remove the drum motor .......................................................................... 123 Lifter-motor assembly (M103) .................................................................................. 125 Remove the lifter motor ........................................................................... 125 DC controller PCA ................................................................................................. 128 Remove the DC controller PCA ................................................................. 128 Reinstallation tip ..................................................................................... 129 Installing a new formatter and a new DC controller .................................... 129 viii ENWW

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HP LaserJet Enterprise 600 M601, M602, M603 Series Printer Service Repair Manual

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