• Code: F1-50
• Description: Finisher incompatibility trouble
  Detection of finisher incompatible
• Causes: Connection of the AR-F13, etc. which is incompatible with MX-2700**/2300** is detected.
• Remedy: Connect the MX-FNX1/MX-FNX2.

• Code: F2-39
• Description: Process thermistor trouble
  Process thermistor open
• Causes: Process thermistor harness connection trouble Process thermistor trouble PCU PWB trouble
• Remedy: Case 1 Cause Process thermistor harness connection trouble Check and remedy Check the connection of the harness, connector of the process thermistor. Case 2 Cause Process thermistor trouble Check and remedy Check the connection of the process thermistor. Case 3 Cause PCU PWB trouble Check and remedy Check the PCU PWB.

• Code: F2-40
• Description: Toner empty sensor abnormality (BLACK)
  Toner empty sensor output abnormality. Sample level 25 or less or 231 or above.
• Causes: The connector is not installed. Connector harness trouble Cartridge trouble
• Remedy: Case 1 Cause The connector is not installed. Check and remedy Check the connection of the connector harness to the PCU PWB. Check the connection of the toner empty sensor. Case 2 Cause Connector harness trouble Check and remedy Check the harness disconnection. Case 3 Cause Cartridge trouble Check and remedy Check the cartridge connection.

• Code: F2-41
• Description: Toner empty sensor abnormality (CYAN)
  Toner empty sensor output abnormality. Sample level 25 or less or 231 or above.
• Causes: The connector is not installed. Connector harness trouble Cartridge trouble
• Remedy: Case 1 Cause The connector is not installed. Check and remedy Check the connection of the connector harness to the PCU PWB. Check the connection of the toner empty sensor. Case 2 Cause Connector harness trouble Check and remedy Check the harness disconnection. Case 3 Cause Cartridge trouble Check and remedy Check the cartridge connection.

• Code: F2-42
• Description: Toner empty sensor abnormality (MAGENTA)
  Toner empty sensor output abnormality. Sample level 25 or less or 231 or above.
• Causes: The connector is not installed. Connector harness trouble Cartridge trouble
• Remedy: Case 1 Cause The connector is not installed. Check and remedy Check the connection of the connector harness to the PCU PWB. Check the connection of the toner empty sensor. Case 2 Cause Connector harness trouble Check and remedy Check the harness disconnection. Case 3 Cause Cartridge trouble Check and remedy Check the cartridge connection.

• Code: F2-43
• Description: Toner empty sensor abnormality (YELLOW)
  Toner empty sensor output abnormality. Sample level 25 or less or 231 or above.
• Causes: The connector is not installed. Connector harness trouble Cartridge trouble
• Remedy: Case 1 Cause The connector is not installed. Check and remedy Check the connection of the connector harness to the PCU PWB. Check the connection of the toner empty sensor. Case 2 Cause Connector harness trouble Check and remedy Check the harness disconnection. Case 3 Cause Cartridge trouble Check and remedy Check the cartridge connection.

• Code: F2-44
• Description: Black exclusive image density sensor trouble (Transfer belt surface reflection ratio abnormality)
  The transfer belt surface is scanned by the image density sensor before starting the process control, and adjust the sensor gain so that the output is kept at a certain level. However, the output is not within the specified range though the senor gain is adjusted.
• Causes: Image density sensor trouble, harness connection trouble between PCU PWB and the image density sensor, image density sensor dirt, transfer belt cleaning trouble, calibration plate solenoid operation trouble
• Remedy: Use SIM44-2 to execute the process control sensor gain adjustment. If "ERROR" is displayed, check the sensor, the harness, the calibration plate solenoid operation for any trouble. If the adjustment is completed, check the transfer belt surface state.

• Code: F2-45
• Description: Color exclusive image density sensor trouble (Calibration plate surface reflection ratio abnormality)
  The calibration plate surface is scanned by the image density sensor before starting the process control, and adjust the sensor gain so that the output is kept at a certain level. However, the output is not within the certain level though the senor gain is adjusted.
• Causes: Image density sensor trouble, harness connection trouble between PCU PWB and the image density sensor, image density sensor dirt, calibration plate dirt, calibration plate solenoid operation trouble
• Remedy: Use SIM44-2 to execute the process control gain adjustment. If "ERROR" is displayed, check the sensor and the harness. If the adjustment is completed, check the calibration plate solenoid operation.