• Code: C960
• Description: Connection error between LGC board and DRV board, ID abnormality
• Remedy: (1) Check if the connectors CN360 and CN331 on the LGC board are completely inserted or not disconnected. (2) Check if the connector J434 on the DRV board is completely inserted or not disconnected. (3) Check if the harness connecting the DRV board (J434) and the LGC board (CN360) is opencircuited. (4) Check if the harness connecting the LGC board (CN331) and the high-voltage transformer (J480) is open-circuited. (5) Check if the conductor pattern on each board is short- or open-circuited. (6) Replace the DRV board. (7) Replace the LGC board. (8) Ask a specialist for a repair (Abnormal ID).

• Code: C970
• Description: Process related service call
  High-voltage transformer abnormality: Leakage of the main charger is detected.
• Remedy: (1) Is the main charger installed securely? (2) Check if the spring of high-voltage supply contact point is deformed. (3) Check if the charger wire is broken or the main charger grid is deformed. (4) Check if any foreign matter is on the charger wire or main charger grid.

• Code: C9E0
• Description: Connection error between the SLG board and the SYS board
• Remedy: (1) Check if the connector CN18 of the SLG board is completely inserted or not disconnected. (2) Check if the connector CN102 of the SYS board is completely inserted or not disconnected. (3) Check if the harness connecting the SLG board (CN18) and the SYS board (CN102) is opencircuited. (4) Check if the conductor pattern on each board is short- or open-circuited. (5) Replace the SLG board. (6) Replace the SYS board.

• Code: CA10
• Description: Polygonal motor abnormality: The polygonal motor is not rotating normally.
• Remedy: Is the polygonal motor rotating? NO 1. Check if the connector CN352 on the LGC board is disconnected. 2. Check if the harness is open-circuited or the connector pin is disconnected. 3. Check if the conductor pattern on the LGC board is short- or open-circuited. 4. Replace the laser optical unit. 5. Replace the LGC board. YES Is the printed image distorted? YES 1. Check if the connector CN352 on the LGC board is almost disconnected. 2. Check if the harness is almost open-circuited or the connector pin is almost disconnected. 3. Check if the conductor pattern on the LGC board is short- or open-circuited. 4. Check if the laser unit cooling fan is stopped. 5. Check if the suction area of laser unit cooling fan is plugged up. 6. Replace the laser optical unit. 7. Replace the LGC board. NO 1. Check if the conductor pattern on the LGC board is short- or open-circuited. 2. Check if the units with high-voltage (developer unit, transfer belt unit and 2nd transfer roller unit) are securely grounded. 3. Check if the bias supply joints of the units with high-voltage are securely connected or they are not stained. 4. Check if the plate in paper transport system is securely grounded. 5. Check if the equipment is grounded. 6. Check if the laser unit cooling fan is stopped. 7. Check if the suction area of laser unit cooling fan is plugged up. 8. Replace the laser optical unit. 9. Replace the LGC board.

• Code: CA20
• Description: H-Sync detection error: H-Sync detection PC board cannot detect laser beams.
• Remedy: Is the cable (flexible flat type) between the connector (CN334) on the LGC board and connector (CN201) on the LDR board open-circuited, broken or disconnected? YES 1. Reconnect the cable. 2. Check if the connector on the LGC board hold the cable securely. 3. Replace the laser optical unit. NO 1. Check if the units with high-voltage (developer unit, transfer belt unit and 2nd transfer roller unit) are securely grounded. 2. Check if the bias supply joints of the units with high-voltage are securely connected or they are not stained. 3. Check if the plate in paper transport system is securely grounded. 4. Check if the equipment is grounded. 5. Check if the conductor pattern is short- or open-circuited. 6. Replace the LGC board. 7. Replace the laser optical unit.

• Code: CB20
• Description: Delivery motor abnormality: Delivery motor or delivery roller is not rotating normally. [MJ-1022]
• Remedy: MJ-1022 Rotate the delivery roller by hand. Does it rotate smoothly? NO Fix the mechanism. YES Is the wiring between the finisher controller PC board and delivery motor (M1) correct? NO Correct the wiring. YES Is the delivery motor clock sensor (S1) working properly? NO Replace the sensor. YES 1. Replace the delivery motor. 2. Replace the finisher controller PC board.

• Code: CB30
• Description: Tray 1/Tray 2 shift motor abnormality: Tray 1/Tray 2 shift motor is not rotating or delivery tray is not moving normally. [MJ-1023/1024]
• Remedy: MJ-1023/1024 Are the tray 1 shift area sensors 1-3 and tray 2 shift area sensors 1-3 normal? NO Replace the tray 1/2 shift area sensor boards. YES Are the wirings between the finisher controller PC board and the tray 1/2 shift motors (M37/M38) correct? NO Correct the wirings. YES Is there any problem with the tray lift mechanism? NO Fix the lift mechanism. YES 1. Replace the tray 1/2 shift motors. 2. Replace the finisher controller PC board.

• Code: CB40
• Description: Rear aligning plate motor abnormality: Rear aligning plate motor is not rotating or aligning plate is not moving normally. [MJ-1023/1024]
• Remedy: MJ-1023/1024 Is the rear aligning plate home position sensor (PI37) normal? NO Replace the sensor. YES Is the wiring between the finisher controller PC board and the rear aligning plate motor (M34) correct? NO Correct the wiring. YES Is there any mechanical problem with the path of aligning plate? NO Fix the mechanism. YES 1. Replace the rear aligning plate motor. 2. Replace the finisher controller PC board.