Fuser Unit Related Service Call - Toshiba e-STUDIO350 Service Handbook

5.1.9

Fuser unit related service call

CAUTION
Be sure to turn OFF the power and unplug the power cable beforehand when checking the IH control cir-
cuit and IH coil.
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.
[C410] Thermistor or heater abnormality at power ON
1.Check the thermistors
(1) Check if the connectors are disconnected.
(2) Check if the main and edge thermistors are in contact with the surface of the fuser roller prop-
erly?
(3) Check if the harnesses of the main and edge thermistors are open circuited.
2. Check the IH board and IH coil
(1) Check if the IH coil is broken.
(2) Check if the connector of the IH coil is disconnected.
(3) Check if the thermostat is blown.
(4) Check if the connectors on the IH board are disconnected (AC input connector and LGC I/F con-
nector CN455/456).
(5) Check if the IH board or the switching power supply unit are abnormal.
• Replace the IH control board.
3. Check the LGC board
(1) Check if the connectors CN316 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 [C410], perform the following:
(1) Turn ON the power while [0] and [8] are pressed simultaneously.
(2) Key in "400", then press [START].
(3) Change the current status counter value "1" or "2" to "0", then press [ENTER] or [INTERRUPT]
(to cancel [C410]).
(4) Turn the power OFF and then back ON. Make sure that the equipment enters the normal ready
state.
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