Replacing the pickup roller ................................................................................................. 57 Replacing the separation pad ............................................................................................. 60 Replacing the main input tray (paper-pickup tray assembly) ............................................. 62 Replacing the output-bin extension (delivery-tray assembly) ............................................. 63 Covers .................................................................................................................................................
64 Right-side cover .................................................................................................................. 64 Left-side cover .................................................................................................................... 66 Rear panel and top-cover assembly ................................................................................... 66 Front cover .......................................................................................................................... 71 Internal assemblies ..............................................................................................................................
73 Transfer-roller assembly ..................................................................................................... 73 Engine-power assembly ..................................................................................................... 75 Fuser (fixing) assembly ....................................................................................................... 77 Paper-pickup assembly ...................................................................................................... 79 Engine control unit (ECU) assembly ...................................................................................
80 Laser/scanner assembly ..................................................................................................... 84 6 Troubleshooting Basic troubleshooting .......................................................................................................................... 86 Troubleshooting checklist ................................................................................................... 86 Control-panel lights ..............................................................................................................................
88 Status-light patterns ............................................................................................................ 88 Jams .................................................................................................................................................... 90 Clearing jams ...................................................................................................................... 90 Typical media jam locations ............................................................................... 90 Removing a jammed page .................................................................................
90 Print-quality troubleshooting ................................................................................................................ 93 Print-cartridge problems ..................................................................................................... 93 Checking the print cartridge ............................................................................... 93 To redistribute toner in the print cartridge ......................................... 93 Solving print-quality problems .............................................................................................
93 Solving paper-feed problems ............................................................................................................ 105 Functional checks .............................................................................................................................. 107 Half self-test functional check ........................................................................................... 107 To perform a half self-test check ...................................................................... 107 To perform other checks ..................................................................................
107 Drum-rotation functional check ........................................................................................ 109 High-voltage-contacts check ............................................................................................. 110 To check the print-cartridge contacts ............................................................. 110 To check the printer high-voltage contacts ..................................................... 111 Troubleshooting tools ........................................................................................................................
112 Repetitive-image-defect ruler ............................................................................................ 112 Circuit diagram .................................................................................................................. 113 Solenoid, sensors, switches, and motor ............................................................................................ 114 7 Parts and diagrams Ordering parts and supplies ..............................................................................................................
116 Parts .................................................................................................................................. 116 Related documentation and software ............................................................................... 116 Parts that wear ................................................................................................................. 116 ENWW v