Toshiba e-STUDIO6520c - Page 465

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ERROR CODE and TROUBLESHOOTING
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[C473] Surge pressure detection / power and voltage upper limit abnormality
[C474] Power and voltage lower limit abnormality
1. Check the AC input voltage
(1) Check if the AC input voltage is within the specification.
2. Check the IH board
(1) Replace the IH board.
[C480] IGBT high temperature abnormality
1. Check the IH cooling fan
(1) Is the IH cooling fan rotating normally? (Check if the connector is disconnected.)
2. Check the IH board
(1) Replace the IH board.
3. Check the LGC board
(1) Check if the connectors CN305/CN306 are disconnected.
(2) Check if the conductor pattern on the board is short circuited or open circuited.
(3) Replace the LGC board.
4. Clear the status counter
Change the current status counter value (08-400) "14" to "0".
[C481] IH drive circuit abnormality
1. Check the IH board
(1) Replace the IH board.
2. Check the LGC board
(1) Check if the connectors CN305/CN306 are disconnected.
(2) Check if the conductor pattern on the board is short circuited or open circuited.
(3) Replace the LGC board.
3. Clear the status counter
Change the current status counter value (08-400) "15" to "0".
[C490] IH circuit abnormality / IH coil abnormality
1. Check the power voltage
(1) Check if the power voltage is normal.(Is the voltage during the operation?10% of the rated
voltage?)
2. Check the IH board
(1) Check if the heaness of IH coil.
(2) Check if the conductor pattern on the board is short circuited or open circuited.
(3) Replace the IH board.
3. Check the IH coil
(1) Check if the IH coil is open circuited or short circuited.
(2) Replace the IH coil.
(3) Check if the fuser belt is damaged.
(4) Replace the fuser belt.
(5) Replace the fuser unit.