• Code: F6-97
• Description: FAX-BOX incompatibility trouble
  The FAX-BOX PWB is not one for the main unit. (FAX detection) If the FAX-BOX modem controller PWB information (hard detection) is not for the main unit, it is judged as an error.
• Causes: Because the FAX-BOX modem controller PWB information (hard detection) is not for the main unit.
• Remedy: Check the FAX-BOX modem controller PWB. Replace it with a modem controller PWB for the main unit.

• Code: F6-98
• Description: Combination error of the FAX-BOX destination information and the machine destination information
  When the destination information stored in the FAX-BOX EEPROM is compared with that of the machine, and if the combination is improper, it is judged as an error.
• Causes: Because of improper combination between the destination information stored in the EEPROM on the FAX-BOX PWB and that of the machine (set with SIM 26-6).
• Remedy: Check the destination of the FAX-BOX. Check the machine destination with SIM 26-6. Use a proper combination of the machine and the FAX-BOX.

• Code: F7-01
• Description: FAX board EEPROM read/write error
  ACK from the EEPROM cannot be checked.
• Causes: EEPROM trouble FAX PWB EEPROM access circuit trouble
• Remedy: Replace the EEPROM. Re-setup the soft SW.

• Code: H2-00
• Description: Thermistor open/Fusing unit not installed (HL1)
  Thermistor open (An input voltage of 4.6V or above is detected.) Fusing unit not installed
• Causes: Thermistor trouble. Control PWB trouble Improper connection of the fusing section connector. AC power trouble. Fusing unit not installed.
• Remedy: Check the harness and the connector between the thermistor and the control PWB. Use SIM 14 to clear the self diag display.

• Code: H2-01
• Description: Thermistor open/Fusing unit not installed (HL2)
  Thermistor open (An input voltage of 4.6V or above is detected.) Fusing unit not installed
• Causes: Thermistor trouble Control PWB trouble Improper. connection of the fusing section connector. AC power trouble. Fusing unit not installed.
• Remedy: Check the harness and the connector between the thermistor and the control PWB. Use SIM 14 to clear the self diag display.

• Code: H2-02
• Description: Thermistor open/Fusing unit not installed (HL3)
  Thermistor open (An input voltage of 4.6V or above is detected.) Fusing unit not installed
• Causes: Thermistor trouble. Control PWB trouble. Improper connection of the fusing section connector. AC power trouble. Fusing unit not installed.
• Remedy: Check the harness and the connector between the thermistor and the control PWB. Use SIM 14 to clear the self diag display.

• Code: H3-00
• Description: Fusing section high temperature trouble (HL1)
  The fusing temperature exceeds 241.5 °C. (An input voltage of 1.3V or less is detected.) When fusing temperature control is started and a temperature of 242 °C is detected 3 times continuously in sampling of 250 msec interval. (In the interval of 150ms)
• Causes: Thermistor trouble Control PWB trouble Improper connection of the fusing section connector AC power trouble
• Remedy: Use SIM 5-2 to check flashing of the heater lamp. When the lamp flashes normally. • Check the thermistor and the harness. • Check the thermistor input circuit on the control PWB. When the lamp keeps ON. • Check the AC PWB and the lamp control circuit on the control PWB. Use SIM 14 to cancel the trouble

• Code: H3-01
• Description: Fusing section high temperature trouble (HL2)
  The fusing temperature exceeds 241.5 °C. (An input voltage of 1.3V or less is detected.) When fusing temperature control is started and a temperature of 242 °C is detected 3 times continuously in sampling of 250 msec interval. (In the interval of 150ms)
• Causes: Thermistor trouble. Control PWB trouble.
  Improper connection of the fusing section
  connector. AC power trouble.
• Remedy: Use SIM 5-2 to check flashing of the heater lamp. When the lamp flashes normally. • Check the thermistor and the harness. • Check the thermistor input circuit on the control PWB. When the lamp keeps ON. • Check the AC PWB and the lamp control circuit on the control PWB. Use SIM 14 to cancel the trouble