• Code: F1-97
• Description: Decurler unit fan 1 (Upper cooling fan) abnormality (DCFAN100)
• Causes: Motor lock, motor harness short/open, control PWB trouble, disconnection of harness or connector.
• Remedy: Use SIM3-51 to check the operation of the decurler unit fan 1 (Upper cooling fan). Check connection from the control PWB to the fan motor. Replace the control PWB. Replace the fan motor.

• Code: F1-98
• Description: Decurler unit fan 2 (Lower cooling fan) abnormality (DCFAN103)
• Causes: Motor lock, motor harness short/open, control PWB trouble, disconnection of harness or connector.
• Remedy: Use SIM3-51 to check the operation of the decurler unit fan 2 (Lower cooling fan). Check connection from the control PWB to the fan motor. Replace the control PWB. Replace the fan motor.

• Code: F1-99
• Description: Decurler unit fan 3 (Transport motor cooling fan) abnormality (DCFAN101)
• Causes: Motor lock, motor harness short/open, control PWB trouble, disconnection of harness or connector
• Remedy: Use SIM3-51 to check the operation of the decurler unit fan 3 (Transport motor cooling fan). Check connection from the control PWB to the fan motor. Replace the control PWB. Replace the fan motor.

• Code: F2-22
• Description: Discharge lamp trouble (K)
• Causes: Contact trouble between the discharge lamp PWB (K) and the PCU PWB. Discharge lamp PWB (K) trouble. PCU PWB trouble.
• Remedy: Use SIM5-4 to check lighting of the discharge lamp (K) [DL_K]. Check the discharge lamp PWB (K). Check the harness and the connector. Replace the PCU PWB.

• Code: F2-33
• Description: Surface potential sensor trouble
• Causes: Sensor dirt, sensor trouble. Surface potential sensor harness connection trouble. PCU PWB trouble. Drum surface state abnormality. Grid high voltage output trouble. Drum charging abnormality due to dirt on the MC grid. The drum life is reached.
• Remedy: Check connection of the harness and the connector of the sensor. Check the PCU PWB. Check for dirt on the MC grid. Clean or replace as needed. Check the drum surface condition. Use Sim. 22-1 to check the drum life meter. If it is 100%, it means that the drum life is reached, and maintenance must be performed. Use Sim. 44-3 to execute DARK V0 and check the operation. Check the grid high voltage output.

• Code: F2-39
• Description: Process temperature sensor trouble
• Causes: Process thermistor trouble. Process thermistor harness connection trouble. PCU PWB trouble.
• Remedy: Replace the process thermistor. Check connection of the process thermistor harness and the connector. Replace the PCU PWB

• Code: F2-40
• Description: Toner density sensor trouble (K)
• Causes: Toner density sensor output abnormality. Sensor connector and harness connection trouble. Developing unit trouble. PCU PWB trouble.
• Remedy: Replace the toner density sensor. Check connection of the sensor connector and the harness. Replace the developing unit. Replace the PCU PWB.

• Code: F2-47
• Description: Room temperature thermistor trouble
• Causes: Room temperature thermistor trouble, room temperature thermistor harness connection trouble, PCU PWB trouble.
• Remedy: Check connection of the room temperature harness / connector. Check the PCU PWB.