Service manual

QMS 3260/4032 Laser Printer - Base Engine Technical Manual 5-15
Release Version 11-97
Primary Fault Isolation Procedures
5.6 Vertical Streaks
PROBLEM
There are black lines running vertically along 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.
• no recommendations
Step Actions and Questions Yes No
1
PAPER PATH INSPECTION
Inspect the paper path, between feed and exit, for contamina-
tion or obstructions.
Is the paper path free of contamination or obstructions?
Go to step 2 Remove con-
tamination
and obstruc-
tions from the
paper path.
2
ROS WINDOW INSPECTION
1. Remove the EP Cartridge.
2. Inspect the ROS Window for contamination that could be
blocking part of the laser beam from reach the Drum.
Is the ROS Window clean?
Go to step 3 Clean ROS
window
3
EP CARTRIDGE REPLACEMENT
Install a new EP Cartridge (CRU).
Are the vertical streaks gone?
Problem
solved
Go to step 4
4
IMAGE TRANSFER INSPECTION
1. Remove the Rear Cover (RRP 1.3).
2. Generate a Grid 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.
Before Transfer was the toner image on the drum normal
and without vertical streaks, but there are vertical streaks
on the paper after Transfer?
Go to step 5 Replace the
BTR Assem-
bly (RRP 5.3)
SER579X