Service manual

QMS 3260/4032 Laser Printer - Base Engine Technical Manual 3-15
Services Release Version 11-97
Primary FIPS: Error Codes
3.12 Error Code U6-2
There is a problem reading information from RAM.
Logic control on the MCU PWB had a problem reading information from RAM.
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 U6-2 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-
in
g
linkin
g
these compo-
nents.
2
LVPS +5VDC CHECK
Measure the volta
g
e 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-
bl
y
(
RRP 9.2
)
3
Replace the MCU PWB (RRP 9.7)
Does the U6-2 error code appear?
Replace the
QMS Video
Controller
(
RRP 9.8
)
Problem
solved