Sharp AR-M236 Service Manual page 98

Trouble
code
Main Sub
code code
H3 01 Content Sub heater lamp abnormally high
temperature hard detection trouble
Details The fusing sub heater thermistor causes
abnormally high temperature.
Cause Sub heater lamp
Thermistor defect
Control PWB failure
Fusing section connector contact failure
Check Check the sub heater lamp blinking with
and SIM 5-2-2.
remedy 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 PWB and the MCU PWB
lamp control circuit.
Clear the display of self-diagnostics with
SIM 14.
H3 10 Content Main heater lamp abnormally high
temperature soft detection trouble
Details A/D value the fusing main heater lamp
thermistor causes abnormally high
temperature (over 230°C).
Cause Main heater lamp thermistor defect
Control PWB failure
Fusing section connector contact failure
Check Check the main heater lamp blinking with
and SIM 5-2-1.
remedy 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 PWB and the MCU PWB
lamp control circuit.
Clear the display of self-diagnostics with
SIM 14.
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 Check the sub heater lamp blinking with
and SIM 5-2-2.
remedy 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 PWB and the MCU PWB
lamp control circuit.
Clear the display of self-diagnostics with
SIM 14.
Details of trouble
AR-M236/M276/M237/M277 TROUBLE CODE LIST 9 - 7
Trouble
code
Main Sub
code code
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 ON SW.
(When the temperature of main heater
lamp thermistor falls below 140°C in the
standby mode or printing.)
Whether 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 Check the heater lamp blinking with SIM 5-
and 2.
remedy When the lamp blinks normally:
Check the thermistor and the harness.
Check the MCU PWB thermistor input
circuit.
When the lamp does not light:
Check for disconnection of the heater
lamp and thermostat.
Check the interlock switch.
Check the power PWB and the MCU PWB
lamp control circuit.
Clear the display of self-diagnostics with
SIM 14.
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 ON SW.
(When the temperature of sub heater
thermistor falls below 140°C in the standby
mode or printing.)
Whether 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 Check the sub heater lamp blinking with
and SIM 5-2-2.
remedy When the lamp blinks normally:
Check the thermistor and the harness.
Check the MCU PWB thermistor input
circuit.
When the lamp does not light:
Check for disconnection of the heater
lamp and thermostat.
Check the interlock switch.
Check the power PWB and the MCU PWB
lamp control circuit.
Clear the display of self-diagnostics with
SIM 14.
Details of trouble