Table Of Contents - HP LaserJet PRO M521 Repair Manua

Table of contents

1 Removal and replacement ................................................................................................ 1
Removal and replacement strategy ............................................................................................. 2
General cautions during removal and replacement ........................................................ 2
Electrostatic discharge ............................................................................................... 2
Required tools ........................................................................................................... 3
Types of screws ........................................................................................................ 3
Service approach ..................................................................................................................... 5
Before performing service .......................................................................................... 5
After performing service ............................................................................................. 5
Post-service test ......................................................................................................... 5
Location of connectors ............................................................................................... 7
Parts removal order ................................................................................................. 10
Removal and replacement procedures ...................................................................................... 11
Customer self repair (CSR) assemblies ....................................................................... 11
External panels, covers, doors, and formatter ............................................................. 18
ENWW
Print-quality test .......................................................................................... 5
DC controller connections ............................................................................ 7
Formatter connections ................................................................................. 9
Toner cartridge ........................................................................................ 11
Tray 2 or Tray 3 assembly ......................................................................... 13
Document feeder rollers ............................................................................ 14
Document feeder pickup roller .................................................... 14
Document feeder separation roller ............................................... 16
Document feeder separation pad ............................................................... 17
Formatter cover ........................................................................................ 18
Formatter PCA ......................................................................................... 19
Fax PCA and cable .................................................................................. 20
Interconnect board (ICB) ........................................................................... 21
Formatter stay .......................................................................................... 22
Dummy cover .......................................................................................... 23
Rear cover assembly ................................................................................. 24
Left cover ................................................................................................ 28
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