Paper-path checklist...........................................................................................369
Paper-path test ..................................................................................................369
To perform a paper-path test.............................................................................370
Jams in tray 1 ....................................................................................................371
Jams in tray 2 ....................................................................................................372
Jams in tray 3 or tray 4.......................................................................................373
Jams in the paper path ......................................................................................374
Jams in the duplex path ....................................................................................374
Media transport problems ...................................................................................................................375
Multiple pages feed ............................................................................................................375
Media is wrinkled or folded.................................................................................................375
Media is skewed ................................................................................................................376
Image-formation troubleshooting ........................................................................................................377
Media-related print-quality problems .................................................................................377
Overhead transparency defects .........................................................................................378
Print-quality problems that are related to the environment................................................378
Print-quality problems that are related to jams...................................................................378
Image defects ....................................................................................................................379
Image quality .....................................................................................................379
Check the print cartridge....................................................................................380
EconoMode........................................................................................................380
Half self-test functional check ...........................................................................381
Drum-rotation functional check..........................................................................381
Image defect tables.............................................................................................................382
Repetitive-defects troubleshooting ....................................................................................400
Troubleshooting the stacker and the stapler/stacker..........................................................................402
Initial checks ......................................................................................................................402
Jam errors ..........................................................................................................................403
Stacker and stapler/stacker paper path.............................................................403
Stacker paper-path test......................................................................................404
Stapler/stacker paper-path test..........................................................................404
Paper-transport errors........................................................................................................406
Malfunction errors...............................................................................................................406
Component errors...............................................................................................................407
Printer-component locations................................................................................................................409
Main printer parts................................................................................................................409
Printer switches and sensors..............................................................................................413
Printer motors and fans......................................................................................................414
Printer PCAs.......................................................................................................................415
Accessory component locations..........................................................................................................416
500-sheet feeder main parts...............................................................................................416
500-sheet feeder switches, sensors, solenoids, and PCAs...............................................417
1,500-sheet feeder main parts............................................................................................418
1,500-sheet feeder switches, sensors, solenoids, and PCAs............................................420
Stapler/stacker stapler assembly........................................................................................421
Stacker and stapler/stacker switches and sensors............................................................422
Stacker and stapler/stacker motors and solenoids.............................................................423
Stacker and stapler/stacker PCAs......................................................................................424
Printer and accessory wiring diagrams...............................................................................................425
HP LaserJet 4200 wiring diagram .....................................................................................426
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