MX-M316N TROUBLESHOOTING 7 – 13
F6-30
FAX 1-chip microprocessor access
error (FAX detection)
F6-97
Incompatibility between FAX control
PWB and the main machine
F6-98
Incompatibility between the FAX
control PWB destination and the main
machine destination
H2-00
Thermistor open trouble (TH_UM)
H2-01
Thermistor open trouble (TH_US)
H3-00
Fusing section high temperature
trouble (TH_UM)
H3-01
Fusing section high temperature
trouble (TH_US)
Trouble content
FAX 1-chip microprocessor access error (Read and
write)
Section
MFP
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.
Trouble content
Incompatibility between FAX control PWB and the
main machine
Section
MFP
Case 1
Cause
The FAX control PWB installed is improper.
FAX control PWB trouble.
Check
and
Remedy
Install a proper FAX control PWB.
Replace the FAX control PWB.
Trouble content
Incompatibility between the FAX control PWB
destination and the main machine destination
Section
MFP
Case 1
Cause
Incompatibility between the destination information
written into the FAX control PWB EEPROM and that
in the main machine (set with SIM26-6)
Check
and
Remedy
1)
Check the destination of the FAX control PWB.
2)
Check the destination of the machine. (SIM26-6)
Trouble content
Main thermistor open hardware detection trouble
Detail
PCU
Cause
Main thermistor trouble
PCU PWB trouble
Thermistor connector and harness connection trouble
Fusing section connector connection trouble
Fusing unit not installed
Check & 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.
Trouble content
Sub thermistor open hardware detection trouble
Detail
PCU
Cause
Sub thermistor trouble
PCU PWB trouble
Thermistor connector and harness connection trouble
Fusing section connector connection trouble
Fusing unit not installed
Check & 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.
Trouble content
Main heater lamp abnormally high temperature
software detection trouble
Detail
PCU
Cause
The fusing temperature exceeds the specified level.
Main thermistor trouble
PCU PWB trouble
Thermistor connector and harness connection trouble
Power unit trouble.
Check & Remedy
Use SIM44-14 to check the state of the thermistor.
Use SIM5-2 to check the flashing operation of the
heater lamp.
Use SIM14 to cancel the trouble.
Replace the thermistor.
Replace the PCU PWB.
Check connection of the thermistor connector and the
harness.
Replace the power unit.
Trouble content
Sub heater lamp abnormally high temperature
software detection trouble
Detail
PCU
Cause
The fusing temperature exceeds the specified level.
Sub thermistor trouble
PCU PWB trouble
Thermistor connector and harness connection trouble
Power unit trouble.
Check & Remedy
Use SIM44-14 to check the state of the thermistor.
Use SIM5-2 to check the flashing operation of the
heater lamp.
Use SIM14 to cancel the trouble.
Replace the thermistor.
Replace the PCU PWB.
Check connection of the thermistor connector and the
harness.
Replace the power unit.