AR-M256/M257/M258/M316/M317/M318/5625/5631 TROUBLE CODE LIST 9 - 9
H3
11
Content
Sub heater lamp abnormally high
temperature soft detection trouble
Details
A/D value the fusing sub heater lamp
thermistor causes abnormally high
temperature (over 230°C).
Cause
Sub heater lamp thermistor defect.
Control PWB failure.
Fusing section connector contact failure.
Check
and
remedy
Check the sub heater lamp blinking with
SIM 5-2-2.
When the lamp blinks normally:
Check the thermistor and the harness.
Check the MCU PWB thermistor input
circuit.
If lamp lights and stays lit:
Check the power circuit and the lamp
control circuit on MCU PWB.
Clear the display of self-diagnostics with
SIM 14.
H4
00
Content
Main heater lamp abnormally low
temperature detection
Details
The setup temperature (about 90°C) is not
reached within the specified time (about
17sec) from turning on the power.
When the temperature of main heater
lamp thermistor falls below 140°C in the
standby mode or printing.
When the temperature of main heater
lamp thermistor falls below 50°C in the
pre-heat mode.
Cause
Main heater lamp thermistor defect
Main heater lamp failure
Main thermostat failure
Control PWB failure
Check
and
remedy
Check the heater lamp blinking with SIM 5-
2.
When the lamp blinks normally:
Check the thermistor and the harness.
Check the MCU PWB thermistor input
circuit.
If lamp lights and stays lit:
Check for disconnection of the heater lamp
and thermostat.
Check the interlock switch.
Check the power circuit and the lamp
control circuit on MCU PWB.
Clear the display of self-diagnostics with
SIM 14.
Trouble
code
Details of trouble
Main
code
Sub
code
H4
01
Content
Sub heater lamp abnormally low
temperature detection
Details
The setup temperature (about 90°C) is not
reached within the specified time (about
17sec) from turning on the power.
When the temperature of sub heater
thermistor falls below 140°C in the standby
mode or printing.
When the temperature of sub heater lamp
thermistor falls below 50°C in the pre-heat
mode.
Cause
Sub heater lamp thermistor defect.
Sub heater lamp failure.
Sub thermostat failure.
Control PWB failure.
Check
and
remedy
Check the sub heater lamp blinking with
SIM 5-2-2.
When the lamp blinks normally:
Check the thermistor and the harness.
Check the MCU PWB thermistor input
circuit.
If lamp lights and stays lit:
Check the power circuit and the lamp
control circuit on MCU PWB.
Clear the display of self-diagnostics with
SIM 14.
20
Content
Main heater lamp abnormally low
temperature detection
Details
The setup temperature (about –25°C: Sim
43-1-1) is not reached within the specified
time (about 32sec) from turning on the
power.
A/D value of fusing main thermistor is not
reached within the specified temperature.
(specified temperature : SIM43-1 (600dpi)
–25°C )
Cause
Main thermistor defect.
Main heater lamp failure.
Main thermostat failure.
Control PWB failure.
Check
and
remedy
Check the main heater lamp blinking with
SIM 5-1.
When the lamp blinks normally:
Check the thermistor and the harness.
Check the MCU PWB thermistor input
circuit.
If lamp lights and stays lit:
Check the power circuit and the lamp
control circuit on MCU PWB.
Clear the display of self-diagnostics with
SIM 14.
Check that there is no foreign material in
the contact section between the thermistor
and the heat roller.
Trouble
code
Details of trouble
Main
code
Sub
code