Fan Failure - Xerox Phaser 4500 Service Manual

Fan Failure

Phaser 4500/4510 Service Manual
Diagnostic Error Code
U-5: Fan Fail
Troubleshooting Reference
Applicable Parts
Main fan
Sub Fan
LVPS
HVPS/engine logic board
Troubleshooting Procedure
Steps Actions and Questions
Turn the power ON.
1
Does the main fan rotate?
2 Does the Sub Fan rotate when the
power is turned ON?
Enter Service Diagnostics, and from the
3
Motors/Fan Test
Fan Motors High Speed
Does the main fan rotate at high-
speed?
4 Enter Service Diagnostics, and from the
Motors/Fan Test
Fan Motors High Speed
Does the Sub Fan rotate at high-
speed?
Measure the voltage across P/J24-18
5
<=> P/J24-17 on HVPS/Main Logic
board.
Does the voltage measure 24 VDC?
(12 VDC at low-speed)
6 Measure the voltage across P/J24-17
<=> P/J24-16.
Does the voltage measure 0.82 VDC
or higher?
7 Turn the power ON.
Does the fan error occur when the
power is turned ON?
Wiring and Plug/Jack Map References
"150-Sheet Feeder, 550-Sheet Feeder, Main
Fan" on page 10-27
"P4500: 24 V Interlock, Rear Cover Switch,
Main Motor, Sub Fan, Exit Motor Assembly" on
page 10-21
"Print Engine Wiring Diagrams" on page 10-19
"Print Engine Plug/Jack Locator" on page 10-3
Yes
Go to step 2.
Go to step 3.
Go to step 4.
menu select the
test.
Replace the
menu select the HVPS/engine
test. logic board
(page 8-73).
Go to step 6.
Replace the
main fan
(page 8-68)
then go to step
Go to step 8.
Error Messages and Codes
No
Go to step 3.
Go to step 9.
Go to step 5.
Go to step 9.
Replace the
LVPS
(page 8-62)
then go to step
8.
Replace the
HVPS/engine
logic board
(page 8-73).
7.
Problem solved.
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