Toshiba e-STUDIO520 Service Handbook page 426

[C471/472/473/474/475] IH power voltage abnormality or IH initial abnormality
1. Check the AC input voltage
Check if the AC input voltage is within the specified range.
(especially when the heater becomes ON after the power is turned ON (the copier is warming up))
2. Check the thermostat
Check if the thermostat is blown.
3. Check the IH control board
(1) Check if the AC input connector on the IH control board, the LGC I/F connectors CN455 is dis-
connected?
(2) Check if the fuse on the IH control board has blown.
(3) Replace the IH control board.
4. Check the LGC board
(1) Check if the connector CN332 and CN334 are disconnected.
(2) Check if the conductor pattern on the board is short- or open-circuited.
(3) Replace the LGC board.
5. Clear the status counter
Change the values "10", "11", "12" or "16" of the status counter (08-400) to "0".
[C480] IH abnormality
1. Check the IH control board
(1) Check if the IGBT or IGBT radiation plate are normal. (Is the radiation plate securely attached?)
(2) Check if the conductor pattern on the board is short- or open-circuited.
(3) Replace the IH control board.
2. Clear the status counter
Change the values "15" of the status counter (08-400) to "0".
[C481] IGBT abnormality
1. Check the operation of the IH fan
Check if the IH fan is rotating normally. (Is the connector securely connected?)
2. Check the IH control board
(1) Check if the IGBT or IGBT radiation plate are normal. (Is the radiation plate securely attached?)
(2) Check if the conductor pattern on the board is short- or open-circuited.
(3) Replace the IH control board.
3. Clear the status counter
Change the values "14" of the status counter (08-400) to "0".
e-STUDIO520/523/600/603/720/723/850/853
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