Service manual

3-
12 QMS 3260/4032 Laser Printer - Base Engine Technical Manual
Release Version 11-97
Primary FIPS: Error Codes
3.9 Error Code U4-3
There is a problem with the Fuser.
Logic Control on the MCU PWB sensed that the Fuser Thermistor opened.
Step Actions and Questions Yes No
SUSPECT COMPONENTS
The following components are associated with this specific
problem. One or more of these components may have failed
partially or completely. If you cannot isolate the problem using
this FIP, replace each component listed below, one at a time,
until the problem disappears.
•
wiring and connectors linking the components
1
Replace the Fuser Assembly (RRP 6.1)
Does the U4-3 error code appear?
Go to step 2 Problem
solved
2
Replace the MCU PWB (RRP 9.7)
Does the U4-3 error code appear?
Refer to the
wiring dia-
grams Section
14 and check
for a broken
wire or a
loose connec-
tion between
components
Problem
solved