Toshiba e-STUDIO556 Service Manual page 601

(3) Replace the LGC board.
5. Check the switching regulator
Check if the connector CN414 are disconnected.
6. Clear the status counter
Change the values "10", "11", "12", "13"or "16" of the status counter (08-2002) to "0".
[C480] IH abnormality
1. Check the IH control board and LGC board
(1) Check if the conductor pattern on the board is short- or open-circuited.
(2) Replace the IH control board.
(3) Replace the LGC board.
(4) Check if the harnesses connecting the IH board and LGC board are open circuited.
2. Clear the status counter
Change the values "15" of the status counter (08-2002) 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 (08-2002) to "0".
[C490] IH control circuit abnormality or IH coil abnormality
1. Check the power voltage
Is the voltage normal? (Is the voltage during the operation ±10% of the rated voltage?)
2. Check the IH control board
(1) Check if the harness of IH coil is loosened.
(2) Check if the conductor pattern on the board is short circuited or open circuited.
(3) Replace the IH control board.
3. Check the IH coil
(1) Check if the coil is broken or shorted.
(2) Replace the IH coil.
4. Clear the status counter
Change the current status counter value (08-2002) "17" to "0".
[C47X], [C481] and [C490] can be cleared by turning OFF and ON the main power switch as long as
the problem was solved, and the status counter does not have to be changed to "0".
The value of the status counter remains until the next service call overwrites the value.
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ERROR CODE AND TROUBLESHOOTING
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e-STUDIO556/656/756/856(Ver03)
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