HP LaserJet PRO M521 Repair Manua page 188

R
rear cover assembly
removing 24
registration roller assembly
removing 86
removing parts 74, 76
cartridge door 34
cautions for 2
checklists 5
control-panel assembly 59
DC controller 102
Document feeder hinge
assembly 57
Document feeder whole unit
kit 52
document feeder/scanner
assembly 46
dummy cover 23
duplex paper-feed 83
environmental sensor 128
Fax PCA and cable 20
formatter cover 18
formatter PCA 19
fuser 80
fuser motor 120
high-voltage power supply
(HVPS) 130
interlock switch assembly 89
laser scanner 98
left cover 28
low-voltage power supply 106
main fan 93
pendulum 121
power-switch assembly 88
rear cover assembly 24
registration roller assembly 86
right cover assembly 36
right handle cover 41
right-rear cover 30
service approach 5
sub cover 11
sub fan 124
tag holder assembly 101
toner cartridge 11
top cover 95
transfer roller 78
tray 1 cover 32
Tray 1 pickup roller 16, 71
Tray 1 pickup solenoid
Tray 1 separation pad 17, 73
178 Index
Tray 2 base-plate roller 76
Tray 2 paper pickup assembly
112
Tray 2 pickup roller 14, 74
Tray 2 pickup solenoid
Tray 2 separation holder 76
Tray 3 base-plate roller 76
Tray 3 pickup roller 14, 74
Tray 3 separation holder 76
tray cassette 13
tray sensor PCA 91
USB cover 57
repair approach 5
replacing parts
cautions for 2
service approach 5
right cover assembly
removing 36
right handle cover
removing 41
right-rear cover
removing 30
S
screwdrivers, required 3
screws
part numbers 142
replacing 2
types of 3
service
approach 5
static precautions 2
sub cover
removing 11
sub fan
removing 124
supplies
ordering 140
T
tag holder assembly
removing 101
tests
post-service 5
print-quality 5
tips iii
toner cartridge
removing 11
tools, required 3
118
top cover
removing 95
transfer roller
removing 78
118 tray 1 cover
removing 32
Tray 1 pickup roller
removing 16, 71
Tray 1 pickup solenoid
removing 118
Tray 1 separation pad
removing 17, 73
Tray 2 base-plate roller
removing 76
Tray 2 paper pickup assembly
removing 112
Tray 2 pickup roller
removing 14, 74
Tray 2 pickup solenoid
removing 118
Tray 2 separation holder
removing 76
Tray 3 base-plate roller
removing 76
Tray 3 pickup roller
removing 14, 74
Tray 3 separation holder
removing 76
tray sensor PCA
removing 91
trays
removing 13
troubleshooting
service approach 5
U
USB cover
removing 57
W
warnings iii
ENWW