Fuser Failure - Xerox Phaser 4500 Service Manual

Error Messages and Codes

Fuser Failure

3-30
Diagnostic Error Codes
U4-1: Fuser High Temp
U4-2: Fuser Low Temp
U4-3: Fuser overheat in stand-by
U4-4: Fuser fails at warm-up
U4-5: Fuser thermistor failure
Troubleshooting Reference
Applicable Parts
Fuser assembly
HVPS/engine logic board
LVPS
Fuser assembly harness
LVPS harness assembly
Troubleshooting Procedure
Steps Actions and Questions
1 Turn the printer ON and notice how
much time elapses before the error
occurs.
Does the error occur soon after the
power is turned ON?
Wiring and Plug/Jack Map References
"Fuser Assembly, Power Switch" on page 10-25
"Print Engine Wiring Diagrams" on page 10-19
"Print Engine Plug/Jack Locator" on page 10-3
Yes
Replace the
fuser assembly.
(page 8-44)
Phaser 4500/4510 Service Manual
No
Go to "Fuser
Assembly" on
page 4-15.