Vertical Band Deletions Service Check - Lexmark W812 Service Manual

4022-XXX
Step Actions and Questions
4 IMAGE DEVELOPMENT INSPECTION
Remove the Left 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 Main Drive Motor to
advance the Drum far enough so you can see the developed
image area on the Drum before it reached Transfer.
Is the image on the drum completely developed; with
sharp, black, easily read areas and clear, white areas?
5 RIP CARD ASSEMBLY REPLACEMENT
Replace the RIP Card Assembly.
Generate a Test Print.
Is the printed Test Pattern normal?
6 ENGINE CARD ASSEMBLY REPLACEMENT
Go to "Engine Card Removal" on page
Generate a Test Print.
Is the printed Test Pattern normal?
7 PRINTHEAD REPLACEMENT
Replace the Printhead Assembly.
Generate a Test Print.
Is the printed Test Pattern normal?
8 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.
• LVPS - Go to
• Refer to the wiring diagrams and check for a broken wire or
loose connection between FRUs in the Xerographic sections of
the printer.

Vertical 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 vertically along the page in the direction of
paper travel.
2-22
Service Manual
"LVPS Removal" on page
Yes
4-10.
4-17.
No
Replace the Go to step 5
Transfer
Roller. Go to
"Transfer
Roller
Removal" on
page 4-38.
Problem Go to step 6
solved
Problem Go to step 7
solved
Problem Go to step 8
solved