Service manual

QMS 3260/4032 Laser Printer - Base Engine Technical Manual 3-9
Services Release Version 11-97
Primary FIPS: Error Codes
3.6 Error Code U3-5
There is a problem with the ROS.
Logic Control on the MCU PWB detected that the ROS Motor has not come up to full speed within the
specified time.
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
RESET
1. Switch off printer main power.
2. Wait one minute.
3. Switch on printer main power.
Does the U3-5 error code appear?
Go to step 2 Suspect a
possible inter-
mittent prob-
lem with the
MCU PWB,
the ROS
Motor, the
SOS Sensor,
or the connec-
tors and wir-
in
g
linkin
g
these compo-
nents.
2
ROS MOTOR TEST
Enter Diagnostic Mode - Output Test 6-75 to check the ROS
Motor function.
Does the ROS Motor run when you start Output Test 6-75?
Go to step 4 Go to step 3
3
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
ROS Assem-
bl
y
(
RRP 5.1
)
Replace the
LVPS Assem-
bl
y
(
RRP 9.2
)
4
Replace the MCU PWB (RRP 9.7)
Does the U3-5 error code appear?
Refer to the
wirin
g
dia-
g
rams Section
14 and check
for a broken
wire between
components
Problem
solved