Cleaning block .................................................................................................................. 175 Step 9: Drum cleaning ...................................................................................... 175 Print cartridges .................................................................................................................. 175 Memory tag ...................................................................................................... 177 Cartridge presence detection ............................................................................................
177 Memory tag detection ....................................................................................... 177 Photosensitive drum detection ......................................................................... 177 Developing cylinder disengaging control ......................................................... 178 ETB (electrostatic transfer/transport belt) ......................................................................... 178 Transfer roller (Y, C, M) engagement/disengagement detection ..................................... 180 Transfer roller engagement/disengagement control .........................................................
180 Calibration and cleaning ................................................................................................... 181 ETB cleaning .................................................................................................... 182 Color misregistration corrective control ........................................................... 183 Color misregistration detection ......................................................................................... 184 Image stabilization control ................................................................................................
185 Environmental change control ......................................................................... 186 Conditions leading up to DHALF ...................................................................... 187 Image halftone calibration control (DHALF) ..................................................... 187 Image density detection ................................................................................... 187 Pickup/feed system ...........................................................................................................................
189 Pickup/feed unit ................................................................................................................ 194 Paper tray detection and paper tray media size detection .............................. 194 Paper tray pickup operation ............................................................................. 195 Media lift-up operation ...................................................................................... 196 Initial lift-up ...................................................................................... 196 Lift-up during printing .......................................................................
196 Multiple-feed prevention ................................................................................... 197 Skew correction ................................................................................................ 199 Media detection ................................................................................................ 200 Feed speed control .......................................................................................... 201 Fusing and delivery block .................................................................................................
202 Loop control ..................................................................................................... 202 Fusing pressure release mechanism ............................................................... 203 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 ........................................................................ 205 Reversing unit jam 2 ........................................................................ 206 Duplexing pickup unit jam 1 ............................................................ 206 Automatic delivery function .............................................................
206 Duplex feed unit ................................................................................................................ 206 Reversing/duplexing feed operation ................................................................ 207 Jam detection ................................................................................................... 209 Reversing unit jam 1 ........................................................................ 210 Reversing unit jam 2 ........................................................................ 210 Duplexing pickup unit jam 1 (Duplexing unit stationary jam) .......... 210 ENWW ix