Table of contents
1 Theory of operation ........................................................................................................................................ 1
Basic operation ..................................................................................................................................... 2
Major product systems ......................................................................................................... 2
Product block diagram ......................................................................................................... 2
Sequence of operation ......................................................................................................... 3
Normal sequence of operation ............................................................................ 3
Formatter-control system ..................................................................................................................... 4
Sleep mode .......................................................................................................................... 4
Input/output .......................................................................................................................... 4
CPU ..................................................................................................................................... 4
Memory ................................................................................................................................ 4
Firmware ............................................................................................................. 5
Memory use ........................................................................................................ 5
PJL overview ....................................................................................................................... 5
LEDM overview .................................................................................................................... 5
ACL overview ....................................................................................................................... 5
Control panel ....................................................................................................................... 6
Engine-control system .......................................................................................................................... 7
Motors, fans, clutches, solenoids, switches, and sensors ................................................... 8
DC controller operations .................................................................................................... 13
Fuser-control circuit ........................................................................................................... 15
Fuser failure detection ....................................................................................... 16
Fuser temperature control ................................................................................. 17
Fuser protective function ................................................................................... 18
Pressure roller cleaning .................................................................................... 18
Low-voltage power supply ................................................................................................. 19
Overcurrent/overvoltage protection ................................................................... 20
High-voltage power supply ................................................................................................ 21
Laser/scanner system ........................................................................................................ 22
Laser failure detection ....................................................................................... 23
Image-formation system ..................................................................................................................... 24
Electrophotographic process ............................................................................................. 24
Image formation process ................................................................................................... 26
Latent-image formation stage ........................................................................... 27
ENWW v
To Next Page
Loading...