HP — Руководство по обслуживанию и ремонту принтера HP LaserJet Enterprise (EN)

Table of contents 1 Theory of operation .......................................................................................................... 1 Basic operation ........................................................................................................................ 2 Sequence of operation (product) ................................................................................. 2 Sequence of operation (scanner) ................................................................................. 3 Formatter-control system ............................................................................................................

4 Sleep delay .............................................................................................................. 4 Image Resolution Enhancement technology ................................................................... 4 Input/output ............................................................................................................. 5 Memory ................................................................................................................... 5 Hard disk .................................................................................................. 5 Random-access memory ..............................................................................

5 Firmware ................................................................................................... 5 Nonvolatile memory ................................................................................... 5 HP Memory Enhancement technology ........................................................... 6 CPU ......................................................................................................... 6 PJL overview ............................................................................................................. 6 PML .........................................................................................................................

6 Control panel ........................................................................................................... 6 Scanner interface ...................................................................................................... 6 Engine-control system ................................................................................................................ 7 DC controller PCA ..................................................................................................... 7 Motors and fans ........................................................................................................

8 Motor and fan functions .............................................................................. 9 Ambient-temperature detection ................................................................... 10 High-voltage power supply ....................................................................................... 11 Fuser control ........................................................................................................... 12 Fuser temperature control .......................................................................... 13 Fuser failure detection ...............................................................................

14 Other functions ........................................................................................ 15 Low-voltage power supply ........................................................................................ 16 Overcurrent/overvoltage protection ............................................................ 17 Safety ..................................................................................................... 17 ENWW v