Service manual

QMS 3260/4032 Laser Printer - Base Engine Technical Manual 5-17
Release Version 11-97
Primary Fault Isolation Procedures
5.7 Horizontal Streaks
PROBLEM
There are black lines running horizontally across the page.
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.
• MCU PWB (RRP 9.7)
• CRU Connector and Contact Springs (PL7.2)
Step Actions and Questions Yes No
1
EP CARTRIDGE REPLACEMENT
Install a new EP Cartridge (RRP 5.2).
Are the horizontal streaks gone?
Problem
solved
Go to step 2
2
IMAGE DEVELOPMENT INSPECTION
1. Remove the Rear Cover (RRP 1.3).
2. Generate a Blank Test Print and switch OFF printer power
halfway through the print cycle.
3. Open the Left Upper Cover.
4. Open the Drum Shutter.
5. Hand rotate (counter clockwise) the Main Drive Motor to
advance the Drum far enough so you can see the devel-
oped image area on the Drum before
it reached Transfer.
Is the image on the drum completely white; without any
horizontal streaks visible?
Go to step 3 Replace the
ROS Assem-
bly (RRP 5.1)
3
IMAGE TRANSFER INSPECTION
Inspect the Blank Test Print you generated in step 2.
Are horizontal streaks visible on the paper after Transfer?
Replace the
BTR Assem-
bly (RRP 5.3)
Go to step 4
SER580X