Service manual

QMS 3260/4032 Laser Printer - Base Engine Technical Manual 5-11
Release Version 11-97
Primary Fault Isolation Procedures
5.3 Black Prints continued
Step Actions and Questions Yes No
5
ESS MOTHER PWB REPLACEMENT
1. Replace the ESS Mother PWB (RRP 9.10)
2. Generate a Grid Test Print.
Is the
p
rinted Test Pattern normal?
Problem
solved
Go to step 6
6
MCU PWB REPLACEMENT
1. Replace the MCU PWB (RRP 9.7)
2. Generate a Grid Test Print.
Is the
p
rinted Test Pattern normal?
Problem
solved
Go to step 7
7
ROS REPLACEMENT
1. Replace the ROS Assembly (RRP 5.1)
2. Generate a Grid Test Print.
Is the
p
rinted Test Pattern normal?
Problem
solved
Refer to the
wiring dia-
grams Section
14 and check
for a broken
wire or loose
connection
between com-
ponents in the
Xerographic
sections of
the printer.