• Code: F3-12
• Description: Paper feed tray 1 lift operation trouble
• Causes: LUD1 is not turned ON within the specified time. CLUD1 sensor trouble. Paper feed tray 1 lift unit trouble. PCU PWB trouble. Sensor harness and connector connection trouble
• Remedy: Check connection of the harness and the connector of LUD1. Replace the lift unit. Replace the PCU PWB.

• Code: F3-22
• Description: Paper feed tray 2 lift operation trouble
  LUD2 does not turn ON within the specified time.
• Causes: LUD2 does not turn ON within the specified time. CLUD2 sensor trouble. Paper feed tray 2 lift unit trouble. PCU PWB trouble. Sensor harness and connector connection trouble
• Remedy: Check the harness and the connector of LUD2. Replace the lift unit. Replace the PCU PWB.

• Code: F3-32
• Description: Main body cassette 3 lift trouble
  C3LUD does not turn ON within the specified time.
• Causes: C3LUD sensor trouble. Cassette 3 lift motor trouble. Harness connection trouble between the PCU PWB, the lift unit, and the paper feed unit
• Remedy: Check the harness and the connector of C3LUD. Check the lift unit.

• Code: F3-42
• Description: Main body cassette 4 lift trouble
  C4LUD does not turn ON within the specified time.
• Causes: C4LUD sensor trouble. Cassette 4 lift motor trouble. Harness connection trouble between the PCU PWB, the lift unit, and the paper feed unit
• Remedy: Check the harness and the connector of C4LUD. Check the lift unit.

• Code: F6-00
• Description: MFPC PWB - FAX communication trouble
  MFP - FAX communication establishment error / Framing / Parity / Protocol error
• Causes: FAX control PWB trouble. FAX control PWB - MFPC PWB connector and harness trouble. FAX control PWB - Mother board connector and harness trouble. FAX control PWB ROM trouble / ROM pin breakage.
• Remedy: Replace the FAX control PWB. Check the connector and the harness between the FAX control PWB and the MFPC PWB. Check the connector and the harness between the FAX control PWB and the mother board. Check the ROM of the FAX control PWB.

• Code: F6-01
• Description: FAX control PWB EEPROM read/write error
  FAX control PWB EEPROM access error (Read and write)
• Causes: FAX control PWB EEPROM trouble. FAX control PWB EEPROM access circuit trouble.
• Remedy: Check that no trouble occurs after replacement of EEPROM. Execute the memory check of SIM66-3 to insure that EEPROM can be accessed. Replace the FAX control PWB.

• Code: F6-04
• Description: FAX MODEM operation trouble
  FAX control PWB MODEM chip operation trouble
• Causes: FAX MODEM chip operation trouble. The FAX MODEM chip cannot be accessed.
• Remedy: Replace the FAX control PWB. Replace the FAX control PWB.

• Code: F6-21
• Description: Improper combination of TEL/LIU PWB and FAX soft switch
  Incompatibility between the TEL/LIU PWB and the FAX control PWB information (soft switch)
• Causes: The destination of the TEL/LIU PWB installed is improper. TEL/LIU PWB trouble
• Remedy: Check the destination of the TEL/LIU PWB. Replace the TEL/LIU PWB.