Xerox Phaser 7760 Service Manual page 228

010-392 Rear Cooling Fan Fail
The machine logic detected a failure of the Rear Fan.
Troubleshooting References
Table 1 References
Applicable Parts Part List
Rear Fan PL 8.1
Engine Control Board PL 13.1
(MCU PWB)
Troubleshooting Procedure
Table 2 Troubleshooting
Step Actions and Questions
1 Enter Service Diagnostics Menu
Control Panel Diagnostics).
Does the Rear Fan revolve at high speed?
2 Is +24 VDC present at J552-1?
3 Does the Control Panel indicate the Fans
are On?
Status Indicator RAP's
010-392
Wiring and Plug/Jack References
Section 7, Engine Control Board (MCU PWB) Plug/
Jack Locations - Figure 15
Yes No
(refer to Go to step 3. Go to step 2.
Go to step 3. Check the wiring to
the Rear Fan. If the
wiring is OK,
replace the Inter-
face Board.
If the problem con-
tinues, replace the
Engine Control
Board (MCU PWB)
(REP 1.2).
Replace the Rear Check the wiring to
Fan. the Rear Fan. If the
wiring is OK,
replace the Engine
Control Board
(MCU PWB)
1.2).
Figure 1 010-392 Rear Cooling Fan Fail
(REP
January 2010
2-192
Revised
Phaser 7760 Color Laser Printer