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HP laserjet pro 400 mfp User Manual
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L
ASER
JET
PRO
4
0
0
M
F
P
Repair Manual
M425
For more information and parts on the HP LaserJet Pro 400, M425 call 800-551-1943 or order on line at www.printersupplies.com
2
Table of Contents
Removal and replacement
17
Removal and replacement strategy
18
Electrostatic discharge
18
Removal and replacement procedures
22
Rollers
22
Multipurpose (MP) tray pickup roller
22
Multipurpose (MP) tray separation pad
22
Tray 2 and optional Tray 3 pickup roller
25
Tray 2 and optional Tray 3 separation pad
26
Document feeder rollers
27
Document feeder separation pad
28
Covers, scanner assembly, and control panel
29
Left cover
29
Scanner assembly
29
Control panel
31
Right cover
33
Top cover
34
Rear cover, rear door, and feed assembly
36
Cartridge door and front cover assembly
38
Main assemblies
41
Laser scanner assembly
41
Registration assembly
42
Fuser assembly and paper feed guide
44
Duplex drive assembly
47
Solenoids
50
Tray 1 solenoid
50
Duplex solenoid
51
Motors and fans
53
Main motor
53
Fan
55
Printed circuit-board assemblies (PCAs)
57
Engine controller assembly (DC controller) PCA
57
Universal serial bus (USB) PCA
62
Formatter PCA
64
Wireless PCA
64
Fax PCA
65
Power switch PCA
66
Connecting PCA
67
Miscellaneous parts
68
Transfer roller
68
Multipurpose (MP) tray pickup gear assembly
69
Document feeder assembly
70
Optional paper feeder (Tray 3)
71
Optional paper feeder paper sensor PCA
73
Parts and diagrams
77
Order parts by authorized service providers
78
Order replacement parts
78
Related documentation and software
78
Supplies part numbers
78
Whole-unit replacement part numbers
78
How to use the parts lists and diagrams
80
Assembly locations
81
Main unit
81
Optional paper feeder
82
Covers, panels, and doors
84
Internal assemblies
86
Scanner and document feeder
98
Input devices
100
500-sheet paper feeder
100
Paper feeder covers
100
Paper feeder main body (1 of 2)
102
Paper feeder main body (2 of 2)
104
Alphabetical parts list
106
Numerical parts list
110
Index
115
4
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HP laserjet pro 400 mfp Specifications
General
Brand
HP
Model
laserjet pro 400 mfp
Category
All in One Printer
Language
English
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