Table of contents 1 Theory of operation Basic operation ..................................................................................................................................... 2 Sequence of operation ......................................................................................................... 3 Engine-control system .......................................................................................................................... 4 DC controller ........................................................................................................................
5 Solenoids ............................................................................................................ 5 Clutches .............................................................................................................. 6 Switches .............................................................................................................. 6 Sensors ............................................................................................................... 7 Motors .................................................................................................................
8 Fans ..................................................................................................................................... 9 High-voltage power supply ................................................................................................ 10 Low-voltage power supply ................................................................................................. 12 Overcurrent/overvoltage protection ................................................................... 13 Safety ................................................................................................................
13 Voltage detection .............................................................................................. 13 Sleep (powersave) mode .................................................................................. 13 Low-voltage power supply failure ...................................................................... 13 Fuser control ...................................................................................................................... 14 Fuser temperature control ................................................................................. 15 Fuser sleeve temperature protection ................................................................
15 Failure detection ................................................................................................ 16 Fuser unit identification ..................................................................................... 17 Fuser unit life detection ..................................................................................... 17 Laser/scanner system ........................................................................................................................ 18 Laser/scanner failure .........................................................................................................
19 Protective-glass cleaners ................................................................................................... 19 Image-formation system ..................................................................................................................... 21 Image-formation process ................................................................................................... 22 Step 1: Pre-exposure ........................................................................................ 24 Step 2: Primary charging ................................................................................... 24 Step 3:
Laser-beam exposure ........................................................................... 25 Step 4: Development ......................................................................................... 25 Step 5: Primary transfer .................................................................................... 26 ENWW v