Xerox Phaser 4500 Service Manual

Error Messages and Codes 3-29
Fan Failure
Error Code
U-5: Fan Fail
Troubleshooting Reference
Applicable Parts Wiring and Plug/Jack Map References
■ Main Fan
■ Sub Fan
■ LVPS
■ HVPS/Engine Logic Board
■ “150-Sheet Feeder, 550-Sheet Feeder, Main Fan”
on page 10-22
■ “24 V Interlock, Rear Cover Switch, Main Motor, Sub
Fan, Exit Motor Assembly” on page 10-18
■ “Print Engine General Wiring Diagram” on
page 10-17
■ “Print Engine Plug/Jack Locator” on page 10-3
Troubleshooting Procedure
Steps Actions and Questions Yes No
1
Turn the power ON.
Does the Main Fan rotate?
Go to step 2. Go to step 3.
2
Does the Sub Fan rotate when the power
is turned ON?
Go to step 3. Go to step 9.
3
Enter Service Diagnostics, and from the
Motors/Fan Test menu select the Fan
Motors High Speed test.
Does the Main Fan rotate at high-speed?
Go to step 4. Go to step 5.
4
Enter Service Diagnostics, and from the
Motors/Fan Test menu select the Fan
Motors High Speed test.
Does the Sub Fan rotate at high-speed?
Replace the
HVPS/Engine
Logic Board
(page 8-89).
Go to step 9.
5
Measure the voltage across P/J24-18 <=>
P/J24-17 on HVPS/Main Logic board.
Does the voltage measure 24 VDC?
(12 VDC at low-speed)
Go to step 6. Replace the
LVPS (page 8-78)
then go to step 8.
6
Measure the voltage across P/J24-17 <=>
P/J24-16.
Does the voltage measure 0.82 VDC or
higher?
Replace the Main
Fan (page 8-84)
then go to step 7.
Replace the
HVPS/Engine
Logic Board
(page 8-89).
7
Turn the power ON.
Does the fan error occur when the power
is turned ON?
Go to step 8. Problem solved.

Xerox Phaser 4500 Specifications

General

Brand	Xerox
Model	Phaser 4500
Category	Printer
Language	English