Rear lower cover ................................................................................................................ 83 Left cover ........................................................................................................................... 84 Right cover ......................................................................................................................... 87 Rear upper cover ............................................................................................................... 91 Internal assemblies ............................................................................................................................
92 Formatter cage .................................................................................................................. 92 Electrostatic transfer belt (ETB) ......................................................................................... 94 Fuser .................................................................................................................................. 95 Duplex fan .......................................................................................................................... 96 Print-cartridge drive motors ...............................................................................................
99 Duplex-reverse-drive assembly ....................................................................................... 100 Duplex-feed-drive assembly ............................................................................................ 103 Fuser drive assembly ....................................................................................................... 105 Developing separation-drive assembly ............................................................................ 108 Pickup-and-feed assembly ..............................................................................................
111 Pickup-drive assembly ..................................................................................................... 117 Laser/scanner assembly .................................................................................................. 126 Main fan ........................................................................................................................... 130 Printed circuit assemblies (PCAs) .................................................................................................... 132 Low-voltage power-supply PCA .......................................................................................
132 DC controller PCA ........................................................................................................... 136 High-voltage power supply .............................................................................................. 138 Memory-controller PCA ................................................................................................... 140 Driver PCA ....................................................................................................................... 142 Control panel ...................................................................................................................
144 Pickup-and-feed driver PCA ............................................................................................ 146 Duplex-driver PCA ........................................................................................................... 148 Sensors ............................................................................................................................................ 150 Cassette media sensor (HP LaserJet 3600/3800/CP3505) ............................................. 150 Temperature sensor ........................................................................................................
152 Paper and registration sensor covers .............................................................................. 153 Cartridge-sensor PCA ...................................................................................................... 154 500-sheet feeder .............................................................................................................................. 157 500-sheet feeder right cover ............................................................................................ 157 500-sheet feeder left cover ..............................................................................................
159 500-sheet feeder rear cover ............................................................................................ 162 500-sheet feeder driver PCA ........................................................................................... 164 Media sensor (500-sheet feeder) ..................................................................................... 166 6 Troubleshooting Troubleshooting process .................................................................................................................. 170 Pre-troubleshooting checklist ..........................................................................................
170 Troubleshooting flowchart ................................................................................................ 172 vi ENWW