HP LaserJet 4250 - Page 11

Tray 1 paper-pickup assembly ..........................................................................................257
Paper-feed assembly..........................................................................................................261
Reinstallation notes for the paper-feed assembly..............................................................262
Main drive assembly...........................................................................................................263
Registration assembly........................................................................................................266
Sensors and switches..........................................................................................................................268
Tray 2/500-sheet feeder media-size sensor (PS101).........................................................269
Tray 2 media-size sensor (PS101) ...................................................................269
500-sheet feeder media-size sensor..................................................................270
Tray 1 paper sensor (PS105).............................................................................................272
Door switch (SW101)..........................................................................................................273
Solenoids and clutches........................................................................................................................274
Tray 2 pickup solenoid (SL101)..........................................................................................275
Tray 1 pickup solenoid (SL102)..........................................................................................276
Feed-roller clutch (CL101)..................................................................................................277
Accessories ........................................................................................................................................278
500-sheet feeder assembly................................................................................................278
500-sheet feed rollers........................................................................................278
500-sheet feeder right-side cover......................................................................278
500-sheet feeder control PCA ...........................................................................281
500-sheet feeder lifter-drive assembly ..............................................................282
500-sheet feeder paper-pickup drive assembly.................................................283
1,500-sheet feeder assembly.............................................................................................288
1,500-sheet feeder feed rollers..........................................................................288
1,500-sheet feeder separation roller .................................................................288
1,500-sheet feeder door.....................................................................................290
1,500-sheet feeder rear cover............................................................................291
1,500-sheet feeder right-side cover ..................................................................292
1,500-sheet feeder control PCA ........................................................................294
1,500-sheet feeder media-size sensor..............................................................296
1,500-sheet feeder lifter-drive assembly ...........................................................297
1,500-sheet feeder paper-pickup drive assembly..............................................300
7 Troubleshooting
Chapter contents.................................................................................................................................301
Introduction .........................................................................................................................................302
Troubleshooting process.....................................................................................................................303
Initial troubleshooting checklist...........................................................................................303
Troubleshooting flowchart ..................................................................................................305
Power-on checks................................................................................................................306
Overview............................................................................................................306
Troubleshooting tools .........................................................................................................................309
Information pages...............................................................................................................310
Menu map..........................................................................................................311
Configuration page ............................................................................................312
Supplies status page .........................................................................................314
Embedded Web server ......................................................................................................315
Gaining access to the embedded Web server...................................................................315
Information tab ..................................................................................................315
Settings tab .......................................................................................................316
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