Troubleshooting Steps - Oki MC361 Service & Troubleshooting Manual

Unexpected Colors
The colors produced by the printer are dramatically different from the color expected.
Initial Actions to Perform
■ Perform Initial Actions from
■ Verify the
■ Verify the
■ Print the ID Check Pattern
page (Setting - Reports – System – Demo Page)
■ Perform isolation
■ Run the
Areas of the Printer that Apply
■ Imaging Unit
■ HVPS
■ PU Board
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?
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.
3. Print the 100% Solid Fill Test pattern and check for any missing colors. Is the problem
with a single color?
4. Is there debris or contamination on the LED Head?
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?
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?
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?
8. Are the wiring harnesses on the LED heads undamaged, properly routed and seated?
9. Inspect the high-voltage wiring harness.
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.
Maintenance Procedures in Chapter
media used is supported by this printer.
media settings are correct at the Control Panel.
(Setting - Reports – Print – ID Check Pattern)
Test Prints (Section 2.8.3).
Density Adjustment Test

Troubleshooting Steps

to see if it is an application problem.
in Section 2.8.5.
1.
and Demo
Resolution
Yes – Complete, the problem is with
the Customer application.
No - Go to Step 2.
Yes – replace the Imaging Unit.
No - Go to Step 3.
Yes –Go to Step 4.
No - Go to Step 6
Yes – Clean with a dry, lint free cloth.
No - Go to Step 5
Yes – Replace the defective LED Head
No – Go to Step 6
Yes – Replace the Imaging Unit
No - Go to Step 7.
Yes – Clean the contacts.
No - Go to Step 8.
Yes – Go to Step 9.
No - reseat the wiring harness.
Yes – reseat the wiring harness.
No - Replace in the following order:
Transfer Unit / LVPS / HVPS / CUPU
Board
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