Vertical Band Deletions - Lexmark W820 Service Manual

Vertical Band Deletions

There are areas of the image that are extremely light or are missing entirely. These
missing areas form lines or bands that run vertically along the page in the direction of
paper travel.
THE PRINTER DISPLAYS NO ERROR CODE.
Step Actions and Questions
1 PRINTHEAD WINDOW INSPECTION
Remove the EP Cartridge.
Inspect the Printhead Window for a scrap of paper or other
contamination that may have lodged in front of it and could be
blocking part of the laser beam from reaching the Drum.
Is the Printhead Window free of paper or other
contamination?
2 PAPER INSPECTION
Inspect the paper loaded in the paper trays.
Is the paper wrinkled, dimpled, or show any sign of having
a high moisture content?
3 EP CARTRIDGE REPLACEMENT
Install a new EP Cartridge.
Are the vertical band deletions gone?
4 IMAGE TRANSFER INSPECTION
Remove the Rear Cover.
Generate a Test Print and switch OFF printer power halfway
through the print cycle.
Open the Left Upper Cover.
Open the Drum Shutter.
Hand rotate (counterclockwise) the Main Drive Motor 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 band deletions?
5 FUSER INSPECTION
Generate another Test Print and switch OFF printer power
when the print is halfway through the Fuser.
Open the Left Upper Cover.
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 band deletions visible when it
exits the Fuser?
2-64
Service Manual
4025-XXX
Yes No
Go to step 2 Remove the
paper scrap
or clean the
Printhead
window.
Replace with Go to step 3
dry, newly
opened paper
Problem Go to step 4
solved
Go to step 5 Replace the
"BTR
Assembly"
on page 4-61
Replace the Go to step 6
"Fuser
Assembly"
on page 4-65