Service manual

5-12 QMS 3260/4032 Laser Printer - Base Engine Technical Manual
Release Version 11-97
Primary Fault Isolation Procedures
5.4 Vertical Band Deletions
PROBLEM
There are areas of the image that are extremely light or missing entirely.
These missing areas form wide bands that run vertically along the page, in
the direction of paper travel.
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
ROS WINDOW INSPECTION
1. Remove the EP Cartridge.
2. Inspect the ROS Window for a scrap of paper or other con-
tamination that may have lodged in front of it and could be
blocking part of the laser beam from reach the Drum.
Is the ROS Window free of paper or other contamination?
Go to step 2 Remove the
paper scrap
or clean the
ROS window.
2
PAPER INSPECTION
Is the paper wrinkled or dimpled?
Load fresh,
dry paper.
Go to step 3
3
EP CARTRIDGE REPLACEMENT
Install a new EP Cartridge (CRU).
Are the vertical band deletions gone?
Problem
solved
Go to step 4
4
IMAGE TRANSFER INSPECTION
1. Remove the Rear Cover (RRP 1.3).
2. Generate a Solid Black 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 band deletions?
Go to step 5 Replace the
BTR Assem-
bly (RRP 5.3)
SER577X