HP Color LaserJet CM4730 MFP - Problem Solving

ADF leading-edge and paper-present sensors ................................................................ 457
ADF hinges ....................................................................................................................... 458
2 X 500-sheet paper input assembly components ............................................................................ 460
Rear cover ........................................................................................................................ 461
Right front cover ................................................................................................................ 462
Left front cover .................................................................................................................. 463
Right cover ........................................................................................................................ 464
Left cover .......................................................................................................................... 466
Right lower cover assembly .............................................................................................. 468
Pickup motor assembly ..................................................................................................... 469
Upper lifter drive assembly ............................................................................................... 470
Lower lifter drive assembly ............................................................................................... 471
Upper pickup drive assembly ............................................................................................ 473
Lower pickup drive assembly ............................................................................................ 473
Upper pickup assembly .................................................................................................... 474
Lower pickup assembly .................................................................................................... 480
Paper feeder door-open switch ......................................................................................... 483
Paper feeder driver PCB ................................................................................................... 485
Intermediate paper transfer unit (IPTU) ............................................................................................. 486
Front cover and front door ................................................................................................ 486
IPTU rear cover ................................................................................................................. 489
Connector cover assembly ............................................................................................... 490
IPTU driver PCB ............................................................................................................... 491
IPTU driver motors ............................................................................................................ 492
Stapler/stacker components .............................................................................................................. 494
Delivery tray ...................................................................................................................... 494
Front cover ........................................................................................................................ 494
Rear cover ........................................................................................................................ 494
Left cover .......................................................................................................................... 495
Top cover .......................................................................................................................... 495
Bottom cover ..................................................................................................................... 496
Stapler unit ..................................................................................................................
...... 497
Jogger unit ........................................................................................................................ 498
Stapler/stacker driver PCB ............................................................................................... 502
3-bin mailbox components ................................................................................................................. 504
Rear cover ........................................................................................................................ 504
Front cover ........................................................................................................................ 504
Delivery tray ...................................................................................................................... 504
Left cover .......................................................................................................................... 505
Upper cover ...................................................................................................................... 505
Right-door unit .................................................................................................................. 506
Bottom cover ..................................................................................................................... 508
MBM driver PCB ............................................................................................................... 509
6 Problem solving
Problem-solving process ................................................................................................................... 512
Problem-solving checklist ................................................................................................. 512
Problem-solving flowchart ................................................................................................. 514
Power-on checks .............................................................................................................. 516
Control-panel messages .................................................................................................................... 517
ENWW xiii