Horizontal Band Deletions Service Check - Lexmark W812 Service Manual

4022-XXX

Horizontal Band Deletions Service Check

There are areas of the image that are extremely light or are missing entirely. These
missing areas form lines or bands that run horizontally across the page.
THE PRINTER DISPLAYS NO ERROR CODE.
Step Actions and Questions
1 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?
2 TONER CARTRIDGE REPLACEMENT
Install a new Toner Cartridge.
Are the horizontal band deletions gone?
3 IMAGE TRANSFER INSPECTION
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 horizontal band deletions, but there are
deletions on the paper after Transfer?
4 TRANSFER ROLLER REPLACEMENT
Replace the Transfer Roller. Go to
on page 4-38.
Generate a Test Print.
Is the Test Print normal, with no horizontal band
deletions?
5 HVPS REPLACEMENT
Replace the HVPS. Go to
Are the horizontal band deletions gone?
6 The following printer FRUs and areas are associated with this
specific problem. One or more of these FRUs or areas may
have failed partially or completely. If you cannot isolate this
problem using the steps in this service check, replace each
FRU or troubleshoot each area listed below, one at a time, until
you isolate and solve the problem.
• Toner Cartridge Connector and Contact Springs
• Engine Card - Go to
• Fuser Assembly - Go to
page 4-14.
2-24
Service Manual
"Transfer Roller Removal"
"HVPS Removal" on page
"Engine Card Removal" on page
"HVPS Cover Removal" on
Yes
Replace with
dry, newly
opened paper
Problem
solved
Go to step 5
Problem
solved
Problem
solved
4-13.
4-10.
No
Go to step 2
Go to step 3
Go to step 4
Go to step 5
Go to step 6