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