Oki C9800 Series, Service & Troubleshooting Manual

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Cyan, Magenta, Yellow, Black LED Failure
Error Codes that Apply
131 Yellow, 132 Magenta, 133 Cyan, 134 Black
1. Cycle the printer's power.
2. If the problem persists follow the procedure below.
1. LED Head 2. LEDPWR harness 3. LED Relay Board 4. YK LED DATA harness
5. CM LED DATA harness 6. LED Relay Board 7. Engine Control Board
Steps Action Taken Yes No
1
Check LED Head. Exchange the
affected LED Head with another LED
Head. Does the error move with the
LED Head?
Replace the LED Head. Go to Step 2.
2
Ensure the LED Head harness is
properly connected and not damaged.
Is the wiring harness defective?
Reconnect or
replace the wiring
harness.
Go to Step 3.
3
Check harness continuity between the
LED Head and the Engine Control
Board. Is there continuity?
Go to Step 4. Replace the data
harness.
4
Check harness continuity between the
LED Head and the LED Relay Board.
Is there continuity?
Go to Step 5. Replace the power
harness.
5
Check for +5 V to the LED Relay
Board.
Replace the LED
Relay Board
Go to Step 6.
6
Check for +5 V at the LVPS. Replace the Engine
Control Board
Replace the LVPS
Initial Troubleshooting Actions to Take
Parts of the Printer that Apply
Troubleshooting Procedure