Oki C9800 Series Service & Troubleshooting Manual page 66

12. Are the LED Head ribbon cables undamaged, properly routed and seated?
13. Swap the LED Head of the problem color with any other LED Head. Print a
Supplies page. Has the problem moved with the LED Head?
14. Replace the Registration Sensor Board. Did this fix the problem?
15. Replace the Engine Control Board EEPROM. Did this fix the problem?
Yes – Go to Step 13.
No - Reseat, correctly route or
replace the wiring harness.
Yes – Replace the defective LED
Head
No - Go to Step14.
Yes – Complete.
No - Go to Step15.
Yes – Complete.
No - Replace the Engine Control
Board