Primary charging .............................................................................. 28 Laser beam exposure ....................................................................... 29 Developing block ............................................................................................... 30 Transfer block ................................................................................................... 31 Primary transfer ................................................................................ 31 Secondary transfer ...........................................................................
31 Separation ........................................................................................ 32 Fusing block ...................................................................................................... 32 ITB cleaning block ............................................................................................. 33 Drum cleaning block .......................................................................................... 33 Print cartridges ...................................................................................................................
34 Memory tag ....................................................................................................... 35 Cartridge presence detection ............................................................................ 35 Toner level detection ......................................................................................... 35 Cartridge life detection ...................................................................................... 35 Developing unit engagement and disengagement control ................................ 35 ITB unit ..............................................................................................................................
37 Primary transfer roller engagement and disengagement control ...................... 38 ITB unit presence detection .............................................................................. 39 ITB cleaning mechanism ................................................................................... 39 Calibration .......................................................................................................................... 40 Color-misregistration control ............................................................................. 40 Environment change control .............................................................................
41 Image stabilization control ................................................................................. 41 Image density control (DMAX) .......................................................... 42 Image halftone control (DHALF) ....................................................... 42 Pickup, feed, and delivery system ...................................................................................................... 43 Photo sensors .................................................................................................................... 44 Motors and solenoids .........................................................................................................
45 Pickup and feed block ........................................................................................................ 45 Cassette pickup ................................................................................................. 45 Cassette multiple-feed prevention ..................................................................... 46 Tray 1 (MP tray) paper pickup ........................................................................................... 47 Tray 1 (MP tray) last-paper detection ................................................................................
48 Paper feed ......................................................................................................................... 49 Skew-feed prevention ....................................................................................... 50 Feed-speed control ........................................................................................... 51 Fusing and delivery block .................................................................................................. 52 Loop control ......................................................................................................
52 Pressure roller pressurization and depressurization control ............................. 53 Output bin full detection .................................................................................... 55 Duplex block (duplex models only) .................................................................................... 56 Jam detection .................................................................................................................... 57 Paper feeder ....................................................................................................................................... 59 iv ENWW