High-voltage power supply ............................................................................................ 14 Fuser failure detection ................................................................................. 13 Laser/scanner system ......................................................................................................................................... 15 Laser failure detection ...................................................................................................................... 15 Image-formation system ....................................................................................................................................
16 Image-formation process ................................................................................................................. 16 Overview ......................................................................................................................... 16 Latent-image formation stage ....................................................................................... 17 Step 1: primary charging .............................................................................. 17 Step 2: laser-beam exposure .......................................................................
18 Developing stage ............................................................................................................ 18 Step 3: development .................................................................................... 18 Transfer stage ................................................................................................................. 19 Step 4: primary transfer ............................................................................... 19 Step 5: secondary transfer ...........................................................................
19 Fusing stage .................................................................................................................... 20 Step 6: separation from the drum ............................................................... 20 Step 7: fusing ................................................................................................ 20 ITB cleaning stage ........................................................................................................... 21 Step 8: ITB cleaning ......................................................................................
21 Drum cleaning stage ....................................................................................................... 22 Step 9: drum cleaning .................................................................................. 22 Developing roller engagement/disengagement control ............................ 22 Pickup-and-feed system ..................................................................................................................................... 23 Jam detection ....................................................................................................................................
25 Pad transfer ....................................................................................................................................... 25 Multiple-feed prevention .................................................................................................................. 26 Scanning and image capture system .................................................................................................................. 27 Scanner power-on sequence of events ............................................................................................
27 Copy or scan sequence of events ...................................................................................................... 28 ADF operation ...................................................................................................................................................... 30 Scanner operation ............................................................................................................................. 28 ADF duplex operation ........................................................................................................................
30 ADF paper path and ADF sensors ...................................................................................................... 30 ADF jam detection ............................................................................................................................. 31 Fax functions and operation ............................................................................................................................... 33 ADF jam clearance .............................................................................................................................
32 Computer and network security features ........................................................................................ 33 PSTN operation ................................................................................................................................. 33 Receive faxes when you hear fax tones ........................................................................................... 33 Distinctive ring function .................................................................................................................... 34 vi ENWW