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F6-30
FAX 1-chip microprocessor access
error (FAX detection)
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
Use SIM66-42 to rewrite the 1-chip microprocessor
and
program.
Remedy
Case 2
Cause
FAX 1-chip microprocessor circuit trouble.
Check
Replace the FAX control PWB.
and
Remedy
F6-97
Incompatibility between FAX control
PWB and the main machine
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
Install a proper FAX control PWB.
and
Replace the FAX control PWB.
Remedy
F6-98
Incompatibility between the FAX
control PWB destination and the main
machine destination
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
1)
Check the destination of the FAX control PWB.
and
2)
Check the destination of the machine. (SIM26-6)
Remedy
H2-00
Thermistor open trouble (TH_UM)
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.
H2-01
Trouble content
Check & Remedy
H3-00
Trouble content
Check & Remedy
H3-01
Trouble content
Check & Remedy
MX-M316N TROUBLESHOOTING 7 – 13
Thermistor open trouble (TH_US)
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
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.
Fusing section high temperature
trouble (TH_UM)
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.
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.
Fusing section high temperature
trouble (TH_US)
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.
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.
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