Repetitive Marks On Each Page Service Check - Lexmark W812 Service Manual

4022-XXX
Step Actions and Questions
3 FUSER ASSEMBLY REPLACEMENT
Replace the Fuser Assembly. Go to
on page 4-14.
Run a half dozen Test Prints.
Does the image rub off?
4 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
• Engine Card Assembly - Go to
page 4-10.

Repetitive Marks on Each Page Service Check

Identical image defects appear on each or on every other printed sheet.
THE PRINTER DISPLAYS NO ERROR CODE.
Step Actions and Questions
1 DRUM IMAGE INSPECTION
Generate a single Test Print.
Open the Top Cover when the sheet of paper is approximately
half-way through the transfer process.
Carefully remove the Toner Cartridge from the printer.
Inspect the surface of the Drum.
Does the mark appear on the Drum before image transfer?
2 TRANSFER IMAGE INSPECTION
Inspect the Test Print generated in step 1.
Does the mark appear on the paper after image transfer?
3 FUSED IMAGE INSPECTION
Generate a single Test Print.
Open the Top Cover when the sheet of paper is approximately
half-way through the Fuser.
Inspect the Test Print.
Does the mark appear on the paper after Fusing?
2-34
Service Manual
"HVPS Cover Removal"
"LVPS Removal" on page
"Engine Card Removal" on
Yes
Go to step 4
4-17.
Yes
Replace the
Toner
Cartridge
Replace the
Transfer
Roller. Go to
"Transfer
Roller
Removal" on
page
Replace the
Fuser
Assembly. Go
to
Cover
Removal" on
page
No
Problem
solved
No
Go to step 2
Go to step 3
4-38.
"HVPS
4-14.