Lexmark CX310dn - Print Quality Missing Image at Edge Service Check; Print Quality Mottle (2-5 MM Speckles) Service Check; Print Quality Narrow Vertical Line Service Check; Print Quality Random Marks Service Check

Print quality missing image at edge service check
Remove and reset the following:
• Toner cartridge
• Imaging unit
• Developer units
Print quality mottle (2‑5 mm speckles) service check
Keep running prints through, and the problem normally clears up. If the problem persists, then replace the developer
cartridge.
Print quality narrow vertical line service check
Check Yes No
Replace the photoconductor unit. See
Imaging unit (IU) removal.
Problem solved. Replace the developer unit. See
Developer unit removal.
Print quality random marks service 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.
Check 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.
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 image
transfer unit. See
Image transfer unit
(ITU).
Contact your next level
of support.
7527
Diagnostic information
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