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H4-00
Fusing section low temperature trou-
ble (TH_UM_AD2)
Trouble content
The temperature does not reach the specified level
within the specified time after turning on the power
relay.
Section
PCU
Case 1
Cause
Thermistor trouble, heater lamp trouble, PCU PWB
trouble, thermostat trouble, AC power source trouble,
interlock switch trouble
Check
1)
Use SIM5-2 to check blinking of the heater lamp.
and
2)
If it blinks normally, check the thermistor and the
remedy
harness.
Check the control PWB thermistor input circuit
section.
3)
If it is not lighted, check for the heater lamp
disconnection and the thermostat breakage.
Check the interlock switch. Check the AC PWB
and the PCU PWB lamp control circuit.
4)
Use SIM14 to cancel the trouble.
H4-01
Fusing section low temperature trou-
ble (TH_LM)
Trouble content
The temperature does not reach the specified level
within the specified time after turning on the power
relay.
Section
PCU
Case 1
Cause
Thermistor trouble, heater lamp trouble, PCU PWB
trouble, thermostat trouble, AC power source trouble,
interlock switch trouble
Check
1)
Use SIM5-2 to check blinking of the heater lamp.
and
2)
If it blinks normally, check the thermistor and the
remedy
harness.
Check the control PWB thermistor input circuit
section.
3)
If it is not lighted, check for the heater lamp
disconnection and the thermostat breakage.
Check the interlock switch. Check the AC PWB
and the PCU PWB lamp control circuit.
4)
Use SIM14 to cancel the trouble.
H4-02
Sub thermistor fusing section low
temperature trouble (TH_US)
Trouble content
The temperature does not reach the specified level
within the specified time after turning on the power
relay.
Section
PCU
Case 1
Cause
Thermistor trouble, heater lamp trouble, PCU PWB
trouble, thermostat trouble, AC power source trouble,
interlock switch trouble
Check
1)
Use SIM5-2 to check blinking of the heater lamp..
and
2)
If it blinks normally, check the thermistor and the
remedy
harness.
Check the control PWB thermistor input circuit
section.
3)
If it is not lighted, check for the heater lamp
disconnection and the thermostat breakage.
Check the interlock switch. Check the AC PWB
and the PCU PWB lamp control circuit.
4)
Use SIM14 to cancel the trouble.
MX-2300/2700 N/G SELF DIAG AND TROUBLE CODE 8 – 22
H4-30
Thermistor differential input trouble
(TH_UM)
Trouble content
TH_UM_AD1 and TH_UM_AD2 do not exceed the
specified level (50 count with the AD value) within
1minute after HL_UM is turned on.
Section
PCU
Case 1
Cause
HL_UM does not turn on. Thermistor trouble, harness
trouble, PCU PWB trouble
Check
1)
Use SIM5-2 to check blinking of the heater lamp.
and
2)
If it blinks normally, check the thermistor and the
remedy
harness.
Check the PCU PWB thermistor input circuit
section.
3)
If it is not lighted, check for the heater lamp
disconnection and the thermostat breakage.
Check the interlock switch. Check the AC PWB
and the PCU PWB lamp control circuit.
4)
Use SIM14 to cancel the trouble.
H5-01
5 continuous detection of POD1 not-
reached jam
Trouble content
5 continuous detection of POD1 not-reached jam
Section
PCU
Case 1
Cause
The fusing jam is not removed completely. (Jam paper
remains.)
Check
Check the fusing section for jam paper. (winding, etc.)
and
remedy
Case 2
Cause
POD1 sensor trouble or harness connection trouble
Check
Check the POD1 sensor harness. Use SIM14 to
and
cancel the trouble.
remedy
Case 3
Cause
Fusing unit installation trouble
Check
Check the fusing unit installation.
and
remedy
L1-00
Mirror feed trouble
Trouble content
Mirror feed is not completed within the specified time.
Section
Scanner
Case 1
Cause
Mirror unit trouble, mirror wire disengagement
Check
Use SIM1-1 to check the mirror operation.
and
remedy
L3-00
Mirror return trouble
Trouble content
Mirror return is not completed within the specified
time.
Section
Scanner
Case 1
Cause
Mirror unit trouble, mirror wire disengagement
Check
Use SIM1-1 to check the mirror operation.
and
remedy
L4-02
Paper feed motor lock trouble
Trouble content
When the paper feed motor is rotated in warming up
or in canceling a jam and the lock signal is not
detected within 1sec.
Section
PCU
Case 1
Cause
Paper feed motor trouble, harness connection trouble
between PCU PWB and paper feed motor, control
circuit trouble
Check
Use SIM6-1 to check the paper feed motor operation.
and
Check the harness and the connector between the
remedy
PCU PWB and the paper feed motor.
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