Tray 1 solenoid ........................................................................................
34
Duplex solenoid .......................................................................................
35
Motors and fans ......................................................................................................
37
Main motor .............................................................................................
Fan ........................................................................................................
39
Printed circuit-board assemblies (PCAs) ......................................................................
41
Engine controller assembly (DC controller) PCA ............................................
Universal serial bus (USB) PCA ..................................................................
46
Formatter PCA .........................................................................................
48
Wireless PCA ..........................................................................................
Power switch PCA ....................................................................................
49
Connecting PCA ......................................................................................
51
Miscellaneous parts .................................................................................................
52
Transfer roller ..........................................................................................
Multipurpose (MP) tray pickup gear assembly ..............................................
Optional paper feeder (Tray 3) .................................................................................
53
Optional paper feeder right cover ..............................................................
54
Optional paper feeder driver PCA ..............................................................
Optional paper feeder paper sensor PCA ...................................................
55
59
Order parts by authorized service providers ..............................................................................
60
Order replacement parts ..........................................................................................
Related documentation and software .........................................................................
Supplies part numbers .............................................................................................
Whole-unit replacement part numbers ........................................................................
How to use the parts lists and diagrams ....................................................................................
62
Assembly locations .................................................................................................................
63
HP LaserJet M401a, M401n, M401d models .............................................................
HP LaserJet M401dn and M401dw models ................................................................
64
Optional paper feeder .............................................................................................
65
Covers, panels, and doors ......................................................................................................
66
Internal assemblies .................................................................................................................
70
Input devices .........................................................................................................................
82
500-sheet paper feeder ...........................................................................................
Paper feeder covers ..................................................................................
Paper feeder main body (1 of 2) ................................................................
84
Paper feeder main body (2 of 2) ................................................................
86
Alphabetical parts list .............................................................................................................
88
Numerical parts list ................................................................................................................
93
vi
ENWW