Service manual

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
g
components are associated with this specific
problem. One or more of these components ma
y
have failed
partiall
y
or completel
y
. If
y
ou cannot isolate the problem usin
g
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
g
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
g
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
y
(
RRP 9.2
)