Xerox Phaser 7760 - Page 110

January 2010
2-74
Phaser 7760 Color Laser Printer
007-250
Revised
Status Indicator RAP’s
007-250 Tray Module Communication Fail
Communication fault between Tray Module PWB and Engine Control Board (MCU PWB).
Troubleshooting References
Troubleshooting Procedure
Figure 1 007-250 Tray Module PWB
Table 1 References
Applicable Parts Parts List Wiring and Plug/Jack Map References
Tray Module Board PL 16.15
Engine Control Board
(MCU PWB)
PL 13.1 Section 7, Engine Control Board (MCU PWB) Plug/
Jack Locations - Figure 15
Table 2 Procedure
Step Actions and Questions Yes No
1 Is J668-1 on the Tray Module Board +5
VDC?
Go to step 2. Refer to wirenets to
troubleshoot and
repair the open
wire.
2 Is the J668-3 on the Tray Module Board +24
VDC?
Go to step 3. Refer to wirenets to
troubleshoot and
repair the open
wire.
3 1. Check the following connectors for
continuity:
• P669-1 to J534A-15
• P669-2 to J534A-14
• P669-3 to J534A-13
• P669-4 to J534A-12
• P669-5 to J534A-11
• P669-6 to J534A-10
2. Do all checks indicate continuity?
Replace in the fol-
lowing order:
1. Tray Module
Board
2. Engine Con-
trol Board
(MCU PWB)
(REP 1.2)
Check and repair
broken wires or bad
connectors.