• 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: Case 1 Cause FAX MODEM chip operation trouble. Check and remedy Replace the FAX control PWB. Case 2 Cause The FAX MODEM chip cannot be accessed. Check and Remedy 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: Case 1 Cause The destination of the TEL/LIU PWB installed is improper. Check and Remedy Check the destination of the TEL/LIU PWB. Case 2 Cause TEL/LIU PWB trouble. Check and Remedy Replace the TEL/LIU PWB.

• Code: F6-30
• Description: FAX 1-chip microprocessor access error (FAX detection)
  FAX 1-chip microprocessor access error (Read and write)
• Causes: Program writing trouble to the 1-chip microprocessor, or no program data written. FAX 1-chip microprocessor circuit trouble.
• Remedy: Case 1 Cause Program writing trouble to the 1-chip microprocessor, or no program data written. Check and Remedy Use SIM66-42 to rewrite the 1-chip microprocessor program. Case 2 Cause FAX 1-chip microprocessor circuit trouble. Check and Remedy Replace the FAX control PWB.

• Code: F6-97
• Description: Incompatibility between FAX control PWB and the main machine
  Incompatibility between FAX control PWB and the main machine
• Causes: The FAX control PWB installed is improper. FAX control PWB trouble.
• Remedy: Install a proper FAX control PWB. Replace the FAX control PWB.

• Code: F6-98
• Description: Incompatibility between the FAX control PWB destination and the main machine destination
  Incompatibility between the FAX control PWB destination and the main machine destination
• Causes: Incompatibility between the destination information written into the FAX control PWB EEPROM and that in the main machine (set with SIM26-6)
• Remedy: 1) Check the destination of the FAX control PWB. 2) Check the destination of the machine. (SIM26-6)

• Code: F9-91
• Description: Communication error between MFP and the printer section when booting
  Booting of the printer section cannot be recognized when booting.
• Causes: MFPC (section) PWB trouble. Printer (section) PWB trouble. Printer flash ROM trouble. MFPC (section) PWB - printer (section) PWB connection trouble.
• Remedy: Replace the MFPC (section) PWB. Replace the printer (section) PWB. Replace the printer flash ROM. Check connection between the MFPC (section) PWB and the printer (section) PWB.

• Code: F9-92
• Description: Printer (section) PWB hardware error
  Printer (section) PWB
• Causes: Printer PWB trouble Font ROM contact trouble or error DIMM memory contact trouble or error
• Remedy: Replace the printer PWB. Check the font ROM socket. Check the DIMM memory socket. Check the font ROM. Replace the DIMM memory.

• Code: H2-00
• Description: Thermistor open trouble (TH_UM_AD2)
• Causes: Thermistor trouble PCU PWB trouble Thermistor connector and harness connection trouble Fusing section connector connection trouble Fusing unit not installed
• Remedy: Use SIM44-14 to check the state of the thermistor. Replace the thermistor. Replace the PCU PWB. Check connection of the thermistor connector and the harness. Check the connector in the fusing section.