Fuser-life detection .......................................................................................... 150 Relay-failure detection ..................................................................................................... 150 Low-voltage power supply ............................................................................................... 150 Overcurrent/overvoltage protection ................................................................. 151 Safety ..............................................................................................................
151 Voltage detection ............................................................................................ 151 Sleep (powersave) mode ................................................................................ 151 High-voltage power supply .............................................................................................. 151 Laser/scanner system ...................................................................................................................... 154 Image-formation system ...................................................................................................................
156 Image-formation process ................................................................................................. 157 Step 1: Pre-exposure ...................................................................................... 158 Step 2: Primary charging ................................................................................. 158 Step 3: Laser-beam exposure ......................................................................... 159 Step 4: Development ....................................................................................... 159 Step 5: Primary transfer .................................................................................. 160 Step 6:
Secondary transfer ............................................................................. 160 Step 7: Separation .......................................................................................... 161 Step 8: Fusing ................................................................................................. 161 Step 9: ITB cleaning ........................................................................................ 162 Step 10: Drum cleaning ................................................................................... 162 Print cartridge ..................................................................................................................
163 Imaging drum ................................................................................................................... 164 Developing roller engagement and disengagement ........................................ 166 Intermediate transfer belt (ITB) unit ................................................................................. 167 Primary-transfer-roller engagement and disengagement ................................ 167 ITB unit detection ............................................................................................ 169 Secondary-transfer-roller unit ..........................................................................................
171 Calibration ........................................................................................................................ 171 Color-misregistration contol ............................................................................ 172 Image stabilization control ............................................................................... 173 Pickup, feed, and delivery system .................................................................................................... 174 Pickup-and-feed unit ........................................................................................................
177 Cassette pickup ............................................................................................... 179 Cassette paper-size and cassette-presence detection ................... 179 Cassette lift operation ..................................................................... 181 Cassette paper-level and paper-presence detection ...................... 182 Multifeed prevention ....................................................................... 183 Multipurpose tray pickup ................................................................................. 184 Multipurpose tray last-paper detection ...........................................
185 Paper feed ....................................................................................................... 186 Skew-feed prevention ..................................................................... 187 Paper-type detection ...................................................................... 188 Feed-speed control ......................................................................... 189 ENWW vii