Parts removal order
Figure 1-4
Parts removal order: covers and customer-replaceable assemblies
Assembly
Remove
Remove
Remove
Remove
Remove
Toner cartridge
Tray2,3
Formatter cover
Formatter PCA
ICB
Fax card and cable
Dummy cover
Formatter cover
Rear cover assy
Left cover
Right-rear cover
Tray 1 cover
Cartridge-door assy
Right cover
Lower right cover
Top cover
I/O Plate
ADF pickup &
separation roller
Control Panel
sub cover
USB PCA
Control Panel
FFC cable
Formatter cover
Formatter cover
Formatter cover
Rear cover assy
Formatter cover
Rear cover assy
1. covers and customer replaceable assemblies
Formatter cover
Dummy cover
Rear cover assy
Left cover
Rear cover assy
Left cover
Tray 1 cover
Tray 1 cover
(could choose
not remove)
Cartridge-door assy
(could choose not
remove, only open)
Assembly
Remove
Remove
Remove
Remove
Control Panel
top cover
2. ADF/Scanner assembly
Scanner whole unit
ADF whole unit
Wifi module
and cable
USB cable &
grounding cable
Control Panel
top cover
Control Panel
Control Panel
top cover
Control Panel
sub cover
Control Panel
top cover
Formatter cover
Dummy cover
Rear cover assy
Left cover
ADF/Scanner
assy
USB bracket
(sheet metal)
Scanner lower
cover
Control Panel
top cover
Control Panel
sub cover
Scanner lower
cover
Control Panel
top cover
Scanner lower
cover
Scanner rear
cover
Scanner rear
cover
ADF hinge assembly
Tray 1
separation pad
Tray 2, 3
separation pad
Tray 2, 3 base-plate
roller assy
Assembly
Remove
Remove
Remove
Remove
Remove
Tray 1 pickup roller
3. Main assemblies
Registration roller
assy
Duplex media-feed
assy
Fuser
Transfer roller
Tray 2, 3
pickup roller
Power-switch assy
Rear cover assy
Right-rear cover
Rear cover assy
Right-rear cover
Rear cover assy Left cover
Formatter cover
Dummy cover
Rear cover assy
Left cover
Right-rear cover
Tray 1 cover
Cartridge-door
assy
Interlock switch assy
Tray sensor PCA
Main fan
DC controller
Top cover
Laser scanner
Tag holder assy
Tray 1 cover
Tray 1 cover
Tray 1 cover
Tray 1 cover
Tray 1 cover
ADF/Scanner assy
ADF/Scanner assy
ADF/Scanner assy
LVPS (Low-voltage
power supply)
Tray 1, 2 pickup
solenoid
Fuser motor
Pendulum assy
Sub fan and
fan duct
Environmental
sensor
Tray 2 paper pickup
HVPS
Formatter cover
Dummy cover
Rear cover assy
Left cover
Right cover
Right cover
Right cover
Right cover
Right cover
Right cover
Duplex media-feed
assy
Duplex media-feed
assy
Cartridge-door assy
Cartridge-door assy
Cartridge-door assy
Cartridge-door assy
Cartridge-door assy
Right cover
Right cover
Right cover
Right cover
Right cover
Lower right cover
(if removing sheet
metal plate)
Top cover
Top cover
Lower right cover
Lower right cover
Lower right cover
Lower right cover
Lower right cover
Lower right cover
ADF/Scanner assy
ADF/Scanner assy
ADF/Scanner assy
ADF/Scanner assy
ADF/Scanner assy
ADF/Scanner assy
Top cover
Top cover
Top cover
Top cover
Top cover
Top cover
Right cover
Right cover
Lower right cover
Lower right cover
ADF/Scanner assy
ADF/Scanner assy
Top cover
Top cover
DC controller
DC controller
LVPS
LVPS
DC controller
LVPS
Fuser motor
DC controller
DC controller
with plate
DC controller
DC controller
DC controller
LVPS
LVPS
LVPS
LVPS
LVPS
Remove
Remove
Remove
Formatter cover
ADF/Scanner assy
ADF/Scanner assy
ADF/Scanner assy
Right cover
Formatter PCA
ICB
Fax card
Formatter Stay
(sheet metal)
I/O Plate assembly
10
Chapter 1 Removal and replacement
ENWW
Summary of Contents for LaserJet Pro M521
Page 1: ...LASERJET PRO MFP Repair Manual M521 2 ...
Page 2: ......
Page 3: ...HP LaserJet Pro MFP M521 Printer Repair Manual ...
Page 6: ...iv Conventions used in this guide ENWW ...
Page 10: ...viii ENWW ...
Page 14: ...14 mm 4 Chapter 1 Removal and replacement ENWW ...
Page 148: ...138 Chapter 1 Removal and replacement ENWW ...
Page 155: ...ENWW Assembly locations 145 ...
Page 186: ...176 Chapter 2 Parts and diagrams ENWW ...
Page 189: ......
Page 190: ... 2012 Hewlett Packard Development Company L P www hp com A8P79 90904 A8P79 90904 A8P79 90904 ...