Lexmark W812 - Vertical Streaks Service Check

Diagnostic Information 2-25
4022-XXX
Vertical Streaks Service Check
There are black lines running vertically along the page.
THE PRINTER DISPLAYS NO ERROR CODE.
Step Actions and Questions Yes No
1 PAPER PATH INSPECTION
Inspect the paper path, between feed and exit, for
contamination or obstructions.
Is the paper path free of contamination or obstructions?
Go to step 2 Remove
contamination
and
obstructions
from the
paper path
2 PRINTHEAD WINDOW INSPECTION
Remove the Toner Cartridge.
Inspect the Printhead Window for contamination that could be
blocking part of the laser beam from reaching the Drum.
Is the Printhead Window clean?
Go to step 3 Clean
Printhead
window
3 TONER CARTRIDGE REPLACEMENT
Install a new Toner Cartridge.
Are the vertical streaks gone?
Problem
solved
Go to step 4
4 IMAGE DEVELOPMENT INSPECTION
Remove the Rear Cover.
Generate a Test Print and switch off printer power halfway
through the print cycle.
Open the Top Cover.
Open the Drum Shutter.
Hand rotate (counterclockwise) the Drum to advance the Drum
far enough so you can see the developed image area on the
Drum before
it reached Transfer.
Before Transfer was the toner image on the drum normal
and without vertical streaks?
Go to step 5 Replace the
Printhead
Assembly. Go
to “Printhead
Assembly
Removal” on
page 4-32.
5 IMAGE TRANSFER INSPECTION
Is the toner image on the page (before fusing) normal and
without vertical streaks?
Go to step 6 Replace the
Transfer
Roller. Go to
“Transfer
Roller
Removal” on
page 4-38.
6 FUSER INSPECTION
Generate another Test Print and switch off printer power when
the print is halfway through the Fuser.
Open the Top Cover and remove the Toner Cartridge.
Examine the paper areas before the image enters the Fuser
and after the image exits the Fuser.
Is the image on the paper normal before it enters the
Fuser, but there are vertical streaks visible when it exits
the Fuser?
Replace the
Fuser
Go to step 7