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Mottled or Splotchy Prints
The print image has a mottled appearance.
Note!
This defect is known to occur at low humidity, and when
printing on heavy weight
media.
Initial Actions
to Perform
■
Perform Initial Actions from
Maintenance Procedures in Chapter 1
.
■
Verify the
media used
is supported by this printer.
■
Verify the
media settings
are correct at the Control Panel.
■
Print the ID Check Pattern
(Reports – Print – ID Check Pattern)
and
Demo page
(Reports – Information – Demo Page)
to see if it is an application problem.
■
Perform isolation
Test Prints
(Section 2.7.3).
■
Run the
Density Error Correction Test
in
Section 2.7.5.
Areas of the Printer that Apply
■
Imaging Unit
■
LED Head
■
HVPS
■
PU Board
Troubleshooting Steps
Resolution
1. Ensure the media is approved and the Control Panel and driver settings match the loaded
media. Try different media to verify consistent, reproducible problem.
Yes – Go to Step 2
No - Have the customer load
approved media or correct the
settings.
2. Print the configuration page to verify the operating environment.
NOTE:
Low humidity, less than 20% relative humidity can cause mottling on prints.
Yes – Go to Step 3
No - Advise customer regarding the
printer’s environmental
specifications.
3. Check for toner contamination on the high voltage contacts. Remove the Imaging Units
and Transfer Unit. Is there contamination?
Yes – Clean the contacts
No - Go to Step 4
4. Check / Replace the Transfer Unit. Is the problem resolved?
Yes – Complete
No - Replace in the following order:
LVPS / HVPS / PU Board
