2-34 Service Manual
4022-XXX
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.
3 FUSER ASSEMBLY REPLACEMENT
Replace the Fuser Assembly. Go to “HVPS Cover Removal”
on page 4-14.
Run a half dozen Test Prints.
Does the image rub off?
Go to step 4 Problem
solved
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 “LVPS Removal” on page 4-17.
• Engine Card Assembly - Go to “Engine Card Removal” on
page 4-10.
Step Actions and Questions Yes No
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?
Replace the
Toner
Cartridge
Go to step 2
2 TRANSFER IMAGE INSPECTION
Inspect the Test Print generated in step 1.
Does the mark appear on the paper after image transfer?
Replace the
Transfer
Roller. Go to
“Transfer
Roller
Removal” on
page 4-38.
Go to step 3
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?
Replace the
Fuser
Assembly. Go
to “HVPS
Cover
Removal” on
page 4-14.
Step Actions and Questions Yes No
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