Toner specks check
Keep running prints through, and the problem normally clears up. If the problem persists, then replace the developer
cartridge.
Narrow vertical line check
Actions Yes No
Replace the photoconductor unit.
Does this solve the problem?
The problem is solved. Replace the developer
unit.
Random marks check
Service tip: The primary cause of random marks is due to loose material moving around inside the printer and attaching
to the photoconductor unit, developer roll, or transfer belt.
Actions Yes No
Step 1
Is there any loose or foreign material on the imaging unit?
Inspect the imaging
unit by looking at the
individual developers
and photoconductors.
Clean or replace the
faulty unit. See
“Imaging unit (IU)
removal” on page
246.
Go to step 2.
Step 2
Is there any loose or foreign material on the developer roll?
Replace the developer
unit.
Go to step 3.
Step 3
Is there any loose or foreign material on the transfer belt?
Replace the ITU. See
“Image transfer unit
(ITU) removal” on
page 243.
Contact your next level
of support.
5027
Diagnostic information
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