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Step 8: Fusing ................................................................................................. 141
Step 9: ITB cleaning ........................................................................................ 142
Step 10: Drum cleaning ................................................................................... 142
Print cartridge .................................................................................................................. 143
Imaging drum ................................................................................................................... 144
Developing roller engagement and disengagement ........................................ 146
Intermediate transfer belt (ITB) unit ................................................................................. 147
Primary-transfer-roller engagement and disengagement ................................ 148
ITB unit detection ............................................................................................ 149
Secondary-transfer-roller unit .......................................................................................... 151
Calibration ........................................................................................................................ 151
Color-misregistration contol ............................................................................ 152
Image-stabilization control .............................................................................. 153
Color-sensor control (duplex models only) ...................................................................... 153
Gray-axis correction ........................................................................................ 155
Pickup, feed, and delivery system .................................................................................................... 156
Pickup-and-feed unit ........................................................................................................ 159
Cassette pickup ............................................................................................... 161
Cassette paper-size and cassette-presence detection ................... 161
Cassette lift operation ..................................................................... 163
Cassette paper-level and paper-presence detection ...................... 164
Multifeed prevention ....................................................................... 165
Multipurpose tray pickup ................................................................................. 166
Multipurpose tray last-paper detection ........................................... 167
Paper feed ....................................................................................................... 168
Skew-feed prevention ..................................................................... 169
Paper-type detection ...................................................................... 170
Feed-speed control ......................................................................... 171
Fusing and delivery unit ................................................................................................... 173
Loop control .................................................................................................... 173
Pressure-roller pressurization control ............................................................. 174
Duplexing unit .................................................................................................................. 175
Duplexing reverse and feed control ................................................................ 176
Jam detection ................................................................................................................................... 177
Optional input trays .......................................................................................................................... 179
Paper-feeder pickup and feed operation ......................................................................... 182
6 Removal and replacement
Removal and replacement strategy .................................................................................................. 186
Introduction ...................................................................................................................... 186
Required tools .................................................................................................................. 187
Types of screws ............................................................................................................... 187
Service approach ............................................................................................................. 188
ENWW vii