Service manual

QMS 3260/4032 Laser Printer - Base Engine Technical Manual 3-47
Services Release Version 11-97
Primary FIPS: Error Codes
3.39 Error Code J8-4
A CRU memory communication error has occurred.
Logic Control on the MCU PWB could not access CRU Memory data.
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
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 +5VDC between J400-7 and FG, and +5VDC
between J400-8 and FG?
Go to step 2 Replace the
LVPS Assem-
bl
y
(
RRP 9.2
)
2
Replace the EP Cartrid
g
e with another one
Does the J8-4 error code still appear?
Go to step 3 Problem
solved
3
Replace the MCU PWB
(
RRP 9.7
)
Does the J8-4 error code still appear?
Refer to the
wirin
g
dia-
g
rams Section
14 and check
for a broken
wire or loose
connection
between com-
ponents
Problem
solved