Image-formation process .......................................................................................... 21 Block 1: Latent image formation ................................................................. 23 Step 1: Primary charging ........................................................... 23 Step 2: Laser-beam exposure ...................................................... 23 Block 2: Developing ................................................................................. 24 Step 3: Developing .................................................................... 24 Block 3: Transfer ......................................................................................
25 Step 4: Transfer ........................................................................ 25 Step 5: Separation .................................................................... 25 Block 4: Fusing ........................................................................................ 26 Step 6: Fusing ........................................................................... 26 Block 5: Drum cleaning ............................................................................. 27 Step 7: Drum cleaning ............................................................... 27 Step 8: Drum charge elimination .................................................
27 Laser/scanner system ............................................................................................................. 28 Laser failure detection .............................................................................................. 30 Pickup, feed, and delivery system ............................................................................................. 31 Pickup-and-feed block .............................................................................................. 32 Fuser/delivery block ................................................................................................
33 Pressure roller pressure release control ....................................................................... 33 Paper trays ............................................................................................................. 34 Printing from Tray 1 .................................................................................. 34 Printing from Tray 2 .................................................................................. 34 Cassette media size detection and cassette presence detection ...................... 34 1x500-sheet paper feeder .......................................................................................................
40 Jam detection ......................................................................................................... 36 Pickup-and-feed operation (PF) .................................................................................. 41 Cassette lift operation (PF) ........................................................................................ 43 Cassette media size detection and cassette presence detection (PF) ............................... 43 Cassette multiple-feed prevention (PF) ........................................................................ 43 Jam detection (PF) ...................................................................................................
43 1x1500-sheet paper deck ....................................................................................................... 44 Pickup-and-feed operation (PD) ................................................................................. 45 Cassette lift operation (PD) ....................................................................................... 47 Media size detection (PD) ........................................................................................ 48 Multiple-feed prevention (PD) ....................................................................................
48 Jam detection (PF) ................................................................................................... 48 Envelope feeder ..................................................................................................................... 49 Pickup-and-feed operation (EF) .................................................................................. 50 Multiple-feed prevention (EF) ..................................................................................... 50 Multiple-feed detection (EF) ....................................................................................... 51 vi ENWW