Table of contents
1 Theory of operation ........................................................................................................................................... 1
Basic operation ..................................................................................................................................... 2
Sequence of operation ......................................................................................................... 3
Normal sequence of operation ............................................................................ 3
Formatter-control system ..................................................................................................................... 5
Formatter hardware ............................................................................................................. 5
Control panel ....................................................................................................................... 6
Engine-control system .......................................................................................................................... 7
DC controller ........................................................................................................................ 8
Motors ............................................................................................................... 11
Fans .................................................................................................................. 12
Fuser-control circuit ........................................................................................................... 13
Fuser heater protection ..................................................................................... 15
Low-voltage power supply ................................................................................................. 16
Over-current/over-voltage protection ................................................................ 18
High-voltage power supply ................................................................................................ 19
Laser/scanner system ........................................................................................................................ 21
Image-formation system ..................................................................................................................... 22
Image formation process ................................................................................................... 23
Toner cartridge .................................................................................................................. 24
Toner cartridge design ...................................................................................... 24
No-shake toner .................................................................................................. 25
Toner cartridge memory chip ............................................................................ 25
Toner seal ......................................................................................................... 25
Toner level detection ......................................................................................... 25
Scanning/image capture system ........................................................................................................ 26
Scanner ............................................................................................................................. 26
Document feeder system ................................................................................................... 27
Document feeder sensors ................................................................................. 28
Document feeder simplex operation ................................................................. 29
Document feeder duplex operation ................................................................... 30
Document feeder paper control and deskew .................................................... 32
ENWW v
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