• Code: F2-40
• Description: ATC sensor abnormality
  ATC sensor value abnormality
• Causes: Connector connection trouble
  Toner cartridge installation trouble
  Sensor breakdown
• Remedy: Connect the connector again. Install the developing unit again. Replace the developing unit with a normal one.

• Code: F5-02
• Description: Copy lamp lighting abnormality
  The copy lamp does not turn on.
  
• Causes: Copy lamp abnormality.
  Copy lamp harness abnormality.
  CCD PWB harness abnormality.
• Remedy: Use SIM 5-3 to check the copy lamp operations. When the copy lamp lights up. Check the harness and the connector between the CCD unit and the MCU PWB. When the copy lamp does not light up. Check the harness and the connector between the copy lamp unit and the MCU PWB. Replace the copy lamp unit. Replace the MCU PWB.

• Code: F6-00
• Description: FAX board communication trouble
  FAX board communication error.
• Causes: No command can be sent from the MCU to the FAX.
• Remedy: Check connection of the FAX board. Replace the FAX board.

• Code: F6-10
• Description: FAX board trouble
  FAX board abnormality detection.
• Causes: FAX controller and FAX board memory abnormality.
• Remedy: Replace the FAX board.

• Code: F6-80
• Description: FAX board communication trouble (Protocol)
  A break error occurs in communication between the MCU and the FAX board.
• Causes: MCU PWB connector connection failure/ Garbled data.
• Remedy: Check connection of the FAX board. Replace the FAX board. Reset the machine (Power OFF/ON).

• Code: F6-81
• Description: FAX board communication trouble (Parity)
  A parity error occurs in communication. between the MCU and the FAX board.
• Causes: MCU PWB connector connection failure/ Garbled data.
• Remedy: Check connection of the FAX board. Replace the FAX board. Reset the machine (Power OFF/ON).

• Code: F6-82
• Description: FAX board communication trouble (Overrun)
  An overrun error occurs in communication between the MCU and the FAX board.
• Causes: MCU PWB connector connection failure/ Garbled data
• Remedy: Check connection of the FAX board. Replace the FAX board. Reset the machine. (Power OFF/ON).

• Code: F6-84
• Description: FAX board communication trouble (Framing)
  A framing error occurs in communication between the MCU and the FAX board.
• Causes: MCU PWB connector connection failure/ Garbled data.
• Remedy: Check connection of the FAX board. Replace the FAX board. Reset the machine (Power OFF/ON).