Toshiba e-studio205L, Service Handbook, Page: 475 / 672

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ERROR CODE AND TROUBLESHOOTING
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6.3.9 Fuser unit related service call
[C3D0] EPU board memory overwriting error
(1) Check if the process unit is properly installed, and check if the connector pins that are connected
to the equipment are disconnected or have any abnormality such as deformation.
(2) Check if the harness connected to the connector J451 on the EPU board has any abnormality.
(3) Replace the EPU memory board.
(4) Replace the LGC board.
[C3D1] EPU board memory new parts detection error
(1) If the process unit has been replaced with a new one before the equipment is started, turn the
power OFF and then back ON in the initial detection mode ([7] + [START]).
(2) If the process unit has not been replaced, check the following.
(3) Check if the process unit is properly installed, and check if the connector pins that are connected
to the equipment are disconnected or have any abnormality such as deformation.
(4) Check if the harness connected to the connector J451 on the EPU board has any abnormality.
(5) Replace the EPU memory board.
(6) Replace the LGC board.
[C3D2] EPU board memory old parts detection error
(1) Check if the process unit is a new one. If it is a new one, check the following:
(2) Check if the process unit is properly installed, and check if the connector pins that are connected
to the equipment are disconnected or have any abnormality such as deformation.
(3) Check if the harness connected to the connector J451 on the EPU board has any abnormality.
(4) Replace the EPU memory board.
(5) Replace the LGC board.
[C410] Thermistor or heater is abnormal at power ON
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 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 thermostat is blown.
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.