Fuser Failure; Fuser High Temp; Fuser Low Temp - Xerox Phaser 4500 Service Manual

Fuser Failure

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?
3-28
Wiring and Plug/Jack Map References
"Fuser Assembly, Power Switch" on page 10-20
"Print Engine General Wiring Diagram" on
page 10-17
"Print Engine Plug/Jack Locator" on page 10-3
Yes
Replace the Fuser
No
Assembly.
(page 8-54)
Phaser 4500 Service Manual
Go to "Fuser
Assembly" on
page 4-16.