HP — Руководство по ремонту HP LaserJet Enterprise M855 (EN)

Table of contents 1 Removal and replacement ................................................................................................................................ 1 Removal and replacement strategy ...................................................................................................... 2 Considerations during removal and replacement ................................................................ 2 Required tools ...................................................................................................................... 3 Types of screws ...................................................................................................................

3 Service approach ................................................................................................................. 3 Before performing service .................................................................................................... 4 After performing service ....................................................................................................... 4 Parts removal order ............................................................................................................. 4 Supported paper sizes and types ........................................................................................

4 Supported paper sizes for the input trays and duplexer ...................................... 5 Supported paper types for the input trays and duplexer ..................................... 7 Supported paper sizes for the finishing accessories ........................................... 9 Supported paper types for the finishing accessories ........................................ 12 Customer-self repair assemblies ........................................................................................................ 14 Toner cartridge ..................................................................................................................

14 Imaging drum ..................................................................................................................... 15 Secondary transfer roller ................................................................................................... 16 Reinstall the secondary transfer roller ............................................................... 17 Tray 2, 1x500 Tray 3, 3x500 Tray 3, 3x500 Tray 4, and 3x500 Tray 5 .............................. 18 Intermediate transfer belt (ITB) ..........................................................................................

19 Fuser .................................................................................................................................. 21 Switch back tray ................................................................................................................. 22 Formatter ........................................................................................................................... 23 Reinstall the formatter or install a replacement formatter ................................. 24 Hard-disk drive (HDD) or solid-state memory (SSM) .........................................................

25 Identify the storage device ................................................................................ 25 Remove the HDD .............................................................................................. 26 Reinstall the HDD ............................................................................. 27 Remove the SSM .............................................................................................. 28 Reinstall the SSM ............................................................................. 29 Reinstall the product firmware ........................................................................... 30 ENWW v