
QMS 3260/4032 Laser Printer - Base Engine Technical Manual 3-13
Services Release Version 11-97
Primary FIPS: Error Codes
3.10 Error Code U4-9
There is a problem with the Fuser Fan.
Logic control on the MCU PWB received a Fan Alarm signal from the Fuser Fan.
Step Actions and Questions Yes No
SUSPECT COMPONENTS
The followin
components are associated with this specific
problem. One or more of these components ma
have failed
partiall
or completel
. If
ou cannot isolate the problem usin
this FIP, replace each component listed below, one at a time,
until the problem disappears.
•
wiring and connectors linking the components
1
FUSER FAN TEST
Enter Dia
nostic Mode - Output Test 4-2 to check the Fuser
Fan function
Does the Fuser Fan run when you start Output Test 4-2?
Replace the
MCU PWB
RRP 9.7
Go to step 2
2
LVPS +24VDC CHECK
Measure the volta
e between J400-5 and FG, and between
J400-6 and FG on the MCU PWB.
Is there +24VDC between J400-5 and FG, and +24VDC
between J400-6 and FG?
Replace the
Fuser Fan
PL1.1.8
Replace the
LVPS Assem-
bl
RRP 9.2
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