HP LaserJet Pro P1100 - Page 7

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
Wireless PCA ....................................................................................................................... 6
Engine-control system .......................................................................................................................... 7
Motors, fans, clutches, solenoids, switches, and sensors ................................................... 8
DC controller operations .................................................................................................... 11
Fuser-control circuit ........................................................................................................... 12
Fuser failure detection ....................................................................................... 13
Fuser temperature control ................................................................................. 14
Fuser protective function ................................................................................... 15
Pressure roller cleaning .................................................................................... 15
Low-voltage power supply ................................................................................................. 16
Overcurrent/overvoltage protection ................................................................... 17
High-voltage power supply ................................................................................................ 18
Laser/scanner system ........................................................................................................ 19
Laser failure detection ....................................................................................... 20
Image-formation system ..................................................................................................................... 21
Electrophotographic process ............................................................................................. 21
Image formation process ................................................................................................... 23
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