HP Designjet T920 Service Manual

Table of contents
1 Printer fundamentals .................................................................................................................................... 1
Introduction ........................................................................................................................................................... 2
Theory of operation ............................................................................................................................................... 5
2 Troubleshooting .......................................................................................................................................... 35
The front panel .................................................................................................................................................... 35
Service keys combination .................................................................................................................................... 38
Troubleshooting tree (T920 and T1500 only) .................................................................................................... 39
Product Troubleshooting trees (T2500 and T3500 only) ................................................................................... 42
Scanner Troubleshooting Tree ............................................................................................................................ 43
Scanner CIS Troubleshooting .............................................................................................................................. 45
Paper handling problems .................................................................................................................................... 46
Ink supply problems ............................................................................................................................................ 62
Print-quality problems ........................................................................................................................................ 77
Connectivity problems ......................................................................................................................................... 93
Scanning Problems .............................................................................................................................................. 98
Firmware upgrades ........................................................................................................................................... 100
3 System error codes .................................................................................................................................... 101
Introduction ....................................................................................................................................................... 102
What to do if the front panel fails to initialize .................................................................................................. 104
System error codes in brief ............................................................................................................................... 107
System error codes in full ................................................................................................................................. 110
Appendix A: How to troubleshoot system error 79:04 and 79.2:04 ................................................................ 143
Appendix B: Updating firmware in boot mode .................................................................................................. 155
Appendix C: Obtaining the diagnostics package ............................................................................................... 156
4 Diagnostics, Service Utilities and Calibrations ............................................................................................. 159
Introduction ....................................................................................................................................................... 160
Diagnostic Tests and Utilities ............................................................................................................................ 161
Service Utilities .................................................................................................................................................. 180
ENWW v

HP Designjet T920 Specifications

General

Model	HP Designjet T920
Category	Printer
Print Technology	Thermal Inkjet
Print Resolution	Up to 2400 x 1200 optimized dpi
Hard Disk	320 GB
Dimensions (W x D x H)	1399 x 916 x 1110 mm
Type	Large Format Printer
Print Speed	21 sec/page on A1/D, 120 A1/D prints per hour
Media Types Supported	Bond and coated paper, technical paper, film, photographic paper, self-adhesive
Connectivity	Gigabit Ethernet (1000Base-T), Hi-Speed USB 2.0, Wi-Fi
Line Accuracy	+/- 0.1%
Print Languages	HP-GL/2, HP-RTL, CALS G4, JPEG
Operating Systems Supported	Windows, macOS
Maximum Print Width	914 mm
Roll Width	24 to 36 in (610 to 914 mm)
Media Sizes Supported	210 to 914 mm wide sheets; 279 to 914 mm rolls