Service manual

QMS 3260/4032 Laser Printer - Base Engine Technical Manual 5-7
Release Version 11-97
Primary Fault Isolation Procedures
5.2 Blank Prints
PROBLEM
The entire print is blank.
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 can-
not 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
CONTROLLER OR HOST SOFTWARE ISOLATION
Generate a Grid Test Print.
Is the test print image normal?
Troubleshoot
or replace the
QMS Video
Controller
(RRP 9.8) or
reload the
Host Driver
Software
Go to step 2
2
EP CARTRIDGE REPLACEMENT
Install a new EP Cartridge (RRP 5.2).
Is there a normal image on the paper?
Problem
solved
Go to step 3
3
IMAGE DEVELOPMENT 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.
Is the image on the drum completely developed; with
sharp, black, easily read areas?
Go to step 4 Replace the
HVPS Assem-
bly (RRP 9.4)