Image-formation process ................................................................................................... 95
Latent-image formation stage ............................................................................................ 96
Developing stage ............................................................................................................... 96
Transfer stage .................................................................................................................... 98
Fusing stage ...................................................................................................................... 99
ITB cleaning stage ........................................................................................................... 100
Drum cleaning stage ........................................................................................................ 101
Pickup-and-feed system ................................................................................................................... 102
Jam detection .................................................................................................................. 104
Pad transfer ..................................................................................................................... 104
Multiple-feed prevention .................................................................................................. 104
Scanner and ADF functions and operation ...................................................................................... 106
Scanner functions ........................................................................................................... 106
Scanner operation ........................................................................................................... 107
ADF operation .................................................................................................................. 107
ADF paper path and ADF sensors ................................................................................... 108
ADF jam detection ........................................................................................................... 109
Memory card system (fax/memory-card models only) ..................................................................... 110
Fax functions and operation (fax/memory-card models only) .......................................................... 111
Computer and network security features ......................................................................... 111
PSTN operation ............................................................................................................... 111
Receive faxes when you hear fax tones .......................................................................... 111
Distinctive ring function .................................................................................................... 112
Fax by using Voice over IP services ................................................................................ 112
The fax subsystem ........................................................................................................... 113
Fax card in the fax subsystem ......................................................................................... 113
Fax page storage in flash memory .................................................................................. 115
6 Removal and replacement
Removal and replacement strategy ................................................................................................. 118
General cautions during removal and replacement ......................................................... 118
Electrostatic discharge ..................................................................................................... 118
Required tools ................................................................................................................. 119
Types of screws ............................................................................................................... 119
Service approach ............................................................................................................. 120
Print cartridges ................................................................................................................................. 122
Tray cassettes and optional Tray 3 assembly .................................................................................. 123
Control-panel bezel ......................................................................................................................... 124
Control panel .................................................................................................................................... 125
Reinstall the control panel ............................................................................................... 126
Paper-feed rollers and pads ............................................................................................................. 127
Transfer roller .................................................................................................................. 127
Pickup roller (Tray 2 and Tray 3) ..................................................................................... 128
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