Oki C9800 Series, Service & Troubleshooting Manual

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Scan Direction Dark Streaks
There are dark lines running parallel with the leading edge of the print.
Initial Actions:
Perform Initial Actions from Print Quality Troubleshooting Practices
Areas of the Printer that Apply to Scan Direction Dark Streaks
Imaging Unit
Transfer Unit belt
Troubleshooting Steps Resolution
1. Print the Color Test Pages. Does the problem occur in one primary color? Yes – Replace the Imaging Unit
of the defective color.
No – Go to Step 2.
2. Inspect the Transfer Unit. Has the cleaning blade flipped or failing to clean the
Transfer Unit?
Yes – Replace the Transfer Unit.
No - Go to Step 3.
3. Inspect the Fuser rollers for contamination. Is the Fuser contaminated? Yes – Replace the Fuser.
No - Go to Step 4.
4. Print a test print Did the test pattern print correctly? Yes – Replace the Fiery Control
Board
No - Replace Engine Control
Board