To access the embedded Web server using a network connection .................. 52
Information tab ................................................................................................... 52
Settings tab ........................................................................................................ 53
Networking tab ................................................................................................... 53
Other links in HP ToolboxFX .............................................................................. 53
4 Operational theory
Engine control system ......................................................................................................................... 56
Basic sequence of operation .............................................................................................. 56
Power-on sequence ............................................................................................................57
Motors and fans .................................................................................................................. 57
Main motor failure detection ...............................................................................58
Fan motor failure detection ................................................................................ 58
Image formation system ...................................................................................................................... 59
Image formation process .................................................................................................... 61
Latent image formation ...................................................................................... 62
Laser/scanner system ........................................................................................ 63
Developing stage ................................................................................................................ 63
Print cartridge ..................................................................................................... 64
Transfer belt (ETB) ............................................................................................. 65
Transfer stage ..................................................................................................................... 66
Separation stage ................................................................................................................. 67
Fusing stage ....................................................................................................................... 67
Pickup and feed system ...................................................................................................................... 69
Manual feed slot pickup mechanism .................................................................................. 71
Paper feed mechanism .......................................................................................................71
Skew correction by the registration shutter ........................................................................ 71
Jam detection ...................................................................................................................... 72
Solenoid, motor, and fan locations ..................................................................................... 73
Printed circuit assembly locations ....................................................................................... 73
250-sheet tray solenoid and printed circuit locations ......................................................... 74
Duplexing mechanism ........................................................................................................ 75
Service-only tools (SERVICE ONLY) .................................................................................................. 80
General timing chart ............................................................................................................ 80
Printer calibration ................................................................................................................ 81
5 Removal and replacement
Overview .............................................................................................................................................. 84
Service approach ................................................................................................................................. 85
Pre-service procedures ....................................................................................................... 85
Removal and replacement procedures ............................................................................................... 86
Print cartridge replacement ................................................................................................. 86
ETB removal and replacement ........................................................................................... 89
Fuser removal and replacement ......................................................................................... 97
Formatter removal and replacement ................................................................................ 105
DC controller removal and replacement ........................................................................... 108
Separation assembly removal and replacement .............................................................. 111
Paper-pickup roller removal and replacement .................................................................. 112
Control panel removal and replacement
........................................................................... 114
Memory-card assembly removal and replacement .......................................................... 119
ENWW v
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