• Code: F1-39
• Description: Finisher punch dust sensor trouble (MX-FNX2)
  Punch dust sensor detection trouble
• Causes: Sensor breakage, harness disconnection, finisher control PWB trouble (MX-FNX2), punch control PWB trouble (MX-FNX2)
• Remedy: Use SIM3-2 to check the operation of the sensor punch dust sensor (FPDD). Replace the finisher control PWB or the punch control PWB.

• Code: F1-40
• Description: Saddle finisher punch power interruption trouble (MX-FNX2)
  When the punch unit power interruption is detected.
• Causes: Harness disconnection, punch control PWB trouble
• Remedy: Use SIM3-3 to check the operation punch motor (FPNW). Replace the finisher punch unit (Replace the punch control PWB.).

• Code: F1-50
• Description: Finisher incompatibility trouble
  Detection of finisher incompatible with MX-3500**/ 4500**/3501**/4501**
• Causes: Connection of the AR-F13, etc. which is incompatible with MX-3500**/4500**/3501**/4501** 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: 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.