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Unexpected Colors
The colors produced by the printer are dramatically different from the color expected.
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 (Setting - Reports – Print – ID Check Pattern) and Demo
page (Setting - Reports – System – Demo Page) to see if it is an application problem.
■ Perform isolation Test Prints (Section 2.8.3).
■ Run the Density Adjustment Test in Section 2.8.5.
Areas of the Printer that Apply
■ Imaging Unit
■ HVPS
■ PU Board
Troubleshooting Steps Resolution
1. Print the ID Check Pattern / Demo Page and evaluate the colors. Are the colors on the test
pages representative of what the customer expects?
Yes – Complete, the problem is with
the Customer application.
No - Go to Step 2.
2. Print a configuration page to check the Imaging Unit life remaining. If the Imaging Unit is
reaching its maximum image count, this can reduce print-quality.
Yes – replace the Imaging Unit.
No - Go to Step 3.
3. Print the 100% Solid Fill Test pattern and check for any missing colors. Is the problem
with a single color?
Yes –Go to Step 4.
No - Go to Step 6
4. Is there debris or contamination on the LED Head?
Yes – Clean with a dry, lint free cloth.
No - Go to Step 5
5. Swap the LED Head of the problem color with any other LED Head. Print a Solid Fill Test
Pattern. Has the problem moved with the LED Head?
Yes – Replace the defective LED Head
No – Go to Step 6
6. Swap the Imaging Unit of the problem color with any other Imaging Unit.
NOTE: Remove the keys before swapping. Print a Solid Fill Test Pattern to check for defects.
Has the problem color moved with the Imaging Unit?
Yes – Replace the Imaging Unit
No - Go to Step 7.
7. Check for toner contamination on the high voltage contacts. Remove the Imaging Units
and the Transfer Unit and Is there contamination on the contacts?
Yes – Clean the contacts.
No - Go to Step 8.
8. Are the wiring harnesses on the LED heads undamaged, properly routed and seated?
Yes – Go to Step 9.
No - reseat the wiring harness.
9. Inspect the high-voltage wiring harness.
Yes – reseat the wiring harness.
No - Replace in the following order:
Transfer Unit / LVPS / HVPS / CUPU
Board
Repeating Bands, Lines, Marks, or Spots
This is usually caused by a damaged roller. In some instances, the spots may be dark
instead of white and are repeated.
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