Service manual

3-
16 QMS 3260/4032 Laser Printer - Base Engine Technical Manual
Release Version 11-97
Primary FIPS: Error Codes
3.13 Error Code U6-3
There is an unnamed problem with non-volatile memory.
Logic Control on the MCU PWB had a problem with NVRAM.
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
RESET
1. Switch off printer main power.
2. Wait one minute.
3. Switch on printer main power.
Does the U6-3 error code appear?
Go to step 2 Suspect a
possible inter-
mittent prob-
lem with the
MCU PWB,
the LVPS, or
the connec-
tors and wir-
ing linking
these compo-
nents.
2
LVPS +5VDC CHECK
Measure the voltage between J400-7 and FG, and between
J400-8 and FG on the MCU PWB.
Is there a steady +5VDC between J400-7 and FG, and a
steady +5VDC between J400-8 and FG?
Go to step 3 Replace the
LVPS Assem-
bly (RRP 9.2)
3
Replace the MCU PWB (RRP 9.7)
Does the U6-3 error code appear?
Replace the
QMS Video
Controller
(RRP 9.8)
Problem
solved