Cartridge presence detection ............................................................................................ 174
Memory tag detection ....................................................................................... 174
Photosensitive drum detection ......................................................................... 174
Developing cylinder disengaging control ......................................................... 175
ETB (electrostatic transfer/transport belt) ......................................................................... 175
Transfer roller (Y, C, M) engagement/disengagement detection ..................................... 177
Transfer roller engagement/disengagement control ......................................................... 177
Calibration and cleaning ................................................................................................... 178
ETB cleaning .................................................................................................... 179
Color misregistration corrective control ........................................................... 180
Color misregistration detection ......................................................................................... 181
Image stabilization control ................................................................................................ 182
Environmental change control ......................................................................... 183
Image density calibration control (DMAX) ....................................................... 184
Image halftone calibration control (DHALF) ..................................................... 184
Image density detection ................................................................................... 184
Pickup/feed system ........................................................................................................................... 186
Pickup/feed unit ................................................................................................................ 191
Cassette detection and cassette media size detection .................................... 191
Cassette pickup operation ............................................................................... 192
Media lifting operation ...................................................................................... 192
Initial lift ............................................................................................ 193
Lift-up during printing ....................................................................... 193
Multiple-feed prevention ................................................................................... 194
Skew correction ................................................................................................ 195
Media detection ................................................................................................ 196
Feed speed control .......................................................................................... 197
Fusing and delivery block ................................................................................................. 198
Loop control ..................................................................................................... 199
Fusing pressure release mechanism ............................................................... 200
Duplex feed unit ................................................................................................................ 201
Duplexing reverse/duplexing feed operation ................................................... 202
Jam detection .................................................................................................................... 204
Pickup delay jam .............................................................................................. 205
Pickup stationary jam ....................................................................................... 205
Delivery delay jam ............................................................................................ 205
Door open jam .................................................................................................. 205
Residual paper jam .......................................................................................... 205
Reversing unit jam 1 ........................................................................................ 206
Reversing unit jam 2 ........................................................................................ 206
Duplexing pickup unit jam 1 ............................................................................. 206
Automatic delivery function .............................................................................. 206
Scanner system ................................................................................................................................. 207
Electrical system ............................................................................................................... 207
Motors and fans ................................................................................................................ 208
Optical assembly ............................................................................................................... 209
ADF feed system .............................................................................................................. 210
ADF jam detection ............................................................................................................ 211
Residual media jam .......................................................................................................... 211
ADF pickup jam ................................................................................................................. 211
ENWW ix
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