MX-2300/2700 N/G SELF DIAG AND TROUBLE CODE 8 – 21
F3-22 Main unit tray 2 lift-up trouble
H2-00 Non-contact thermistor detection
thermistor open (TH_UM_AD2)
H2-01 Lower thermistor open (TH_LM)
H2-02 Sub thermistor open (TH_US)
H2-03 Non-contact thermistor
compensation thermistor open
(TH_UM_AD1)
H3-00 Fusing section high temperature
trouble (TH_UM)
H3-01 Fusing section high temperature trou-
ble (TH_LM)
H3-02 Sub thermistor fusing section high
temperature trouble (TH_US)
Trouble content LUD2 does not turn ON within the specified time.
Section PCU
Case 1 Cause LUD2 sensor trouble, harness connection trouble
between PCU PWB, the lift-up unit, and the paper
feed unit.
Check
and
remedy
Check the harness and the connector of LUD2.
Case 2 Cause Tray 2 lift-up motor trouble
Check
and
remedy
Check the lift-up unit.
Trouble content Thermistor open
Section PCU
Case 1 Cause Thermistor trouble, control PWB trouble, fusing
section connector connection trouble, AC power
source trouble, fusing unit not-installed
Check
and
remedy
Check the harness and the connector from the
thermistor to the control PWB.
Trouble content Thermistor open
Section PCU
Case 1 Cause Thermistor trouble, control PWB trouble, fusing
section connector connection trouble, AC power
source trouble, fusing unit not-installed
Check
and
remedy
Check the harness and the connector from the
thermistor to the control PWB.
Trouble content Thermistor open
Section PCU
Case 1 Cause Thermistor trouble, control PWB trouble, fusing
section connector connection trouble, AC power
source trouble, fusing unit not-installed
Check
and
remedy
Check the harness and the connector from the
thermistor to the control PWB.
Trouble content Thermistor open
Section PCU
Case 1 Cause Thermistor trouble, control PWB trouble, fusing
section connector connection trouble, AC power
source trouble
Check
and
remedy
Check the harness and the connector from the
thermistor to the control PWB.
Trouble content The fusing temperature inside the PWB exceeds the
specified level.
Section PCU
Case 1 Cause Thermistor trouble, control PWB trouble, fusing
section connector connection error, AC power source
trouble
Check
and
remedy
1) Use SIM5-2 to check blinking of the heater lamp.
2) If it blinks normally, check the thermistor and the
harness.
Check the control PWB thermistor input circuit
section.
3) If the heater lamp keep lighting, check the AC
PWB and the control PWB lamp control circuit.
4) Use SIM14 to cancel the trouble.
Trouble content The fusing temperature inside the PWB exceeds the
specified level.
Section PCU
Case 1 Cause Thermistor trouble, control PWB trouble, fusing
section connector connection error, AC power source
trouble
Check
and
remedy
1) Use SIM5-2 to check blinking of the heater lamp.
2) If it blinks normally, check the thermistor and the
harness.
Check the control PWB thermistor input circuit
section.
3) If the heater lamp keep lighting, check the AC
PWB and the control PWB lamp control circuit.
4) Use SIM14 to cancel the trouble.
Trouble content The fusing temperature inside the PWB exceeds the
specified level.
Section PCU
Case 1 Cause Thermistor trouble, control PWB trouble, fusing
section connector connection error, AC power source
trouble
Check
and
remedy
1) Use SIM5-2 to check blinking of the heater lamp.
2) If it blinks normally, check the thermistor and the
harness.
Check the control PWB thermistor input circuit
section.
3) If the heater lamp keep lighting, check the AC
PWB and the control PWB lamp control circuit.
4) Use SIM14 to cancel the trouble.
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