HP LaserJet Enterprise M4555 - Page 10

Image data path ..................................................................................................... 92
Document feeder/scanner paper path and sensors ...................................................... 93
Document feeder pickup mechanism .......................................................................... 94
2 Removal and replacement .............................................................................................. 95
Introduction ........................................................................................................................... 97
Removal and replacement strategy ........................................................................................... 98
Electrostatic discharge ............................................................................................................ 99
Required tools ...................................................................................................................... 100
Service approach ................................................................................................................. 101
Before performing service ...................................................................................... 101
After performing service ......................................................................................... 101
Post-service test ..................................................................................................... 101
Print-quality test ...................................................................................... 101
Print cartridge ...................................................................................................................... 102
Staple cartridge (for models with a stapler/stacker) .................................................................. 106
Control panel ...................................................................................................................... 108
Transfer roller ...................................................................................................................... 111
Output bin and bin base assembly ......................................................................................... 112
Duplex accessory ................................................................................................................. 113
Fuser-entrance guide ............................................................................................................ 114
Remove the fuser-entrance guide ............................................................................. 114
Fuser .................................................................................................................................. 115
Remove the fuser ................................................................................................... 115
Tray 1 separation roller ........................................................................................................ 116
Envelope feeder cover .......................................................................................................... 117
Tray 1 pickup and feed rollers ............................................................................................... 118
Tray 2, 3, 4, or 5 pickup, feed, and separation rollers ............................................................. 119
Scanner filter cover and scanner filter ..................................................................................... 120
Interface formatter PCA ......................................................................................................... 121
Hard drive .......................................................................................................................... 123
Remove the SSD .................................................................................................... 123
Remove the encrypted HDD .................................................................................... 124
Installing a replacement hard drive .......................................................................... 126
HDD firmware upgrade ........................................................................... 127
SSD firmware upgrade ........................................................................... 128
Fax accessory PCA .............................................................................................................. 129
Document feeder tray extender .............................................................................................. 130
Document feeder pickup roller cover ....................................................................................... 131
Document feeder pickup roller ............................................................................................... 132
Document feeder pickup roller pad and spring ........................................................................ 133
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