HP laserjet pro 400 mfp - Page 8

Solenoids ............................................................................................................... 34
Tray 1 solenoid ........................................................................................ 34
Duplex solenoid ....................................................................................... 35
Motors and fans ...................................................................................................... 37
Main motor ............................................................................................. 37
Fan ........................................................................................................ 39
Printed circuit-board assemblies (PCAs) ...................................................................... 41
Engine controller assembly (DC controller) PCA ............................................ 41
Universal serial bus (USB) PCA .................................................................. 46
Formatter PCA ......................................................................................... 48
Wireless PCA .......................................................................................... 48
Fax PCA ................................................................................................. 49
Power switch PCA .................................................................................... 50
Connecting PCA ...................................................................................... 51
Miscellaneous parts ................................................................................................. 52
Transfer roller .......................................................................................... 52
Multipurpose (MP) tray pickup gear assembly .............................................. 53
Document feeder assembly ........................................................................ 54
Optional paper feeder (Tray 3) ................................................................................. 55
Optional paper feeder right cover .............................................................. 56
Optional paper feeder driver PCA .............................................................. 56
Optional paper feeder paper sensor PCA ................................................... 57
2 Parts and diagrams ........................................................................................................ 61
Order parts by authorized service providers .............................................................................. 62
Order replacement parts .......................................................................................... 62
Related documentation and software ......................................................................... 62
Supplies part numbers ............................................................................................. 62
Whole-unit replacement part numbers ........................................................................ 62
How to use the parts lists and diagrams .................................................................................... 64
Assembly locations ................................................................................................................. 65
Main unit ............................................................................................................... 65
Optional paper feeder ............................................................................................. 66
Covers, panels, and doors ...................................................................................................... 68
Internal assemblies ................................................................................................................. 70
Scanner and document feeder ................................................................................................. 82
Input devices ......................................................................................................................... 84
500-sheet paper feeder ........................................................................................... 84
Paper feeder covers .................................................................................. 84
Paper feeder main body (1 of 2) ................................................................ 86
Paper feeder main body (2 of 2) ................................................................ 88
vi ENWW
For more information and parts on the HP LaserJet Pro 400, M425 call 800-551-1943 or order on line at www.printersupplies.com