HP — HP LaserJet Professional P1100 Series Printer (EN)

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 ENWW v