Multipurpose tray pickup ................................................................................. 156
Paper feed ....................................................................................................... 157
Skew-feed prevention ..................................................................... 158
OHT detection ................................................................................ 158
Fusing and delivery unit ................................................................................................... 159
Loop control .................................................................................................... 159
Pressure-roller pressurization control ............................................................. 160
Duplexing unit ................................................................................................................. 162
Duplexing reverse and feed control ................................................................ 163
Duplex pickup operation .................................................................................. 163
Jam detection ................................................................................................................................... 164
Optional paper feeder ....................................................................................................................... 166
Paper-feeder pickup and feed operation ......................................................................... 168
Paper-size detection and cassette-presence detection ................................................... 168
Paper-feeder cassette lift operation ................................................................................. 170
Paper-feeder presence detection .................................................................................... 171
Paper-feeder multiple feed prevention ............................................................................. 172
Paper feeder jam detection .............................................................................................. 173
Scanning/image capture system system .......................................................................................... 174
Optical assembly ............................................................................................................. 174
Automatic document feed system .................................................................................... 174
Control panel ................................................................................................... 174
Sensors in the ADF ......................................................................................... 174
ADF paper path ............................................................................................... 175
Stapler ............................................................................................................. 176
6 Removal and replacement
Introduction ....................................................................................................................................... 178
Removal and replacement strategy ................................................................................................. 178
Electrostatic discharge ..................................................................................................................... 178
Required tools ................................................................................................................................. 179
Before performing service ................................................................................................................ 180
After performing service ................................................................................................................... 181
Post-service test ............................................................................................................................... 182
Print-quality test ............................................................................................................... 182
Copy-quality test .............................................................................................................. 182
DC controller PCA ............................................................................................................................ 183
Parts removal order .......................................................................................................................... 184
Customer self repair (CSR) components ......................................................................................... 186
Print cartridges ................................................................................................................. 186
Stapler cartridge .............................................................................................................. 188
Duplex-reverse guide ....................................................................................................... 189
Toner-collection unit ........................................................................................................ 190
ENWW vii
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