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ERROR CODE AND TROUBLESHOOTING
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8.3.13 Fuser unit related service call
[C410] [C411] Thermistor or heater is abnormal at power ON
[C412] Thermistor or heater is abnormal at power ON
CAUTION
Be sure to turn OFF the power and unplug the power cable beforehand when checking the
heater.
The fuser unit itself or the part of the unit remains heated and the capacitors are still charged
after a while the power cable is unplugged. So make sure the unit is cooled down enough
before checking.
Classification Error content
Fuser unit related service call Thermistor or heater is abnormal at power ON
Check item Measure
1. Check the thermistors 1. Check if the connectors are disconnected.
2. Check if the center, side and edge thermistors are in contact
with the surface of the fuser roller properly?
3. Check if the center, side and edge thermistors are not
deformed or dirty.
4. Check if the harnesses of the center, side and edge
thermistors are open circuited.
2. Check the heater 1. Check if the heater is broken.
2. Check if the connector of the heater is disconnected.
3. Check if the harnesses are connected properly to the
terminals of the heater lamp.
4. Check if the thermostat is blown.
3. Check the LGC board 1. Check if the connectors CN308 are disconnected.
2. Check if the conductor pattern on the LGC board is short
circuited or open circuited.
3. Replace the LGC board.
4. Clear the status counter After repairing the matter which caused the error, perform the
following:
1. Turn ON the power while [0] and [8] are pressed
simultaneously.
2. Key in “2002”, then press [START].
3. Change the current status counter value “1” or “2” to “0”,
then press [OK] or [INTERRUPT] (to cancel the error).
4. Turn the power OFF and then back ON. Make sure that the
equipment enters the normal ready state.
Parts to be replaced Remark
LGC board
Classification Error content
Fuser unit related service call Thermistor or heater is abnormal at power ON
Check item Measure
1. Check the fuse Check if the fuse (F203) is open circuited.
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