Diagnostics ............................................................................................................................400
LED diagnostics ..............................................................................................................400
Engine diagnostics .........................................................................................................402
Diagnostics from the control panel .................................................................................403
Test pages .............................................................................................................................415
Engine test page .............................................................................................................415
Formatter test page ........................................................................................................415
Engine resets ........................................................................................................................416
Cold reset .......................................................................................................................416
NVRAM initialization .......................................................................................................416
Hard disk initialization .....................................................................................................417
Calibration bypass ..........................................................................................................417
Calibrate now ..................................................................................................................417
Full calibrate now (HP Color LaserJet 5550 models) ...........................................................418
Quick calibrate now (HP Color LaserJet 5550 models).........................................................419
Service menu ........................................................................................................................420
Accessing the Service menu ..........................................................................................420
Clear event log ................................................................................................................420
Total page count .............................................................................................................420
Transfer kit count ............................................................................................................420
Fuser kit count ................................................................................................................420
Serial number .................................................................................................................420
Service ID .......................................................................................................................421
Restoring the Service ID .................................................................................................421
Converting the Service ID to an actual date ...................................................................421
Cold reset paper .............................................................................................................421
Diagrams ...............................................................................................................................422
Main parts .......................................................................................................................422
Switches .........................................................................................................................424
Solenoid and clutch ........................................................................................................425
Motors and fans ..............................................................................................................426
PCBs ...............................................................................................................................427
DC controller PCB ..........................................................................................................428
Connectors .....................................................................................................................429
500-sheet paper feeder connectors ...............................................................................432
General circuit diagram ..................................................................................................433
500-sheet paper feeder circuit diagram ..........................................................................434
8 Parts and diagrams
Introduction ............................................................................................................................436
Ordering parts .......................................................................................................................437
Supplies and accessories ...............................................................................................437
Common fasteners .........................................................................................................442
Illustrations and parts lists (printer) .......................................................................................444
Illustrations and parts lists (500-sheet paper feeder) ...........................................................494
Alphabetical parts list.............................................................................................................508
Numerical parts list.................................................................................................................517
Index
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