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June 2005 © TOSHIBA TEC e-STUDIO281c/351c/451c TROUBLESHOOTING
5 - 55
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5.1.13 RADF related service call
No service call for the RADF (MR-3018).
5.1.14 Circuit related service call
[C900] Connection error between the SYS board and the LGC board
(1) Check if the connector CN117 on the SYS board is completely inserted or not disconnected.
(2) Check if the connector CN357 on the LGC board is completely inserted or not disconnected.
(3) Check if the harness connecting the SYS board (CN117) and the LGC board (CN357) is open
circuited.
(4) Check if the conductor pattern on each board is short circuited or open circuited.
(5) Replace the SYS board.
(6) Replace the LGC board.
[C940] Engine-CPU abnormality
[C950] Memory of the LGC board abnormality, ID abnormality
(1) Check if the connectors CN331 and CN 343 on the SYS board are completely inserted or not dis-
connected.
(2) Check if the connector CN434 on the DRV board is completely inserted or not disconnected.
(3) Check if the conductor pattern on each board is short circuited or open circuited.
(4) Replace the NVRAM.
(5) Replace the LGC board.
(6) Replace the DRV board.
(7) Replace the SYS board.
(8) Ask a specialist for a repair (Abnormal ID).
[C960] Connection error between the LGC board and the DRV board, ID abnormality
(1) Check if the connectors CN331 and CN343 on the LGC board are completely inserted or not dis-
connected.
(2) Check if the connector CN434 on the DRV board is completely inserted or not disconnected.
(3) Check if the harness connecting the DRV board (J434) and the LGC board (CN360) is open cir-
cuited.
(4) Check if the harness connecting the LGC board (CN331) and the high-voltage transformer
(J480) is open circuited.
(5) Check if the conductor pattern on each board is short circuited or open circuited.
(6) Replace the DRV board.
(7) Replace the LGC board.
(8) Ask a specialist for a repair (Abnormal ID).
Does service call still occur even after turning OFF the main switch then back ON?
È
NO Æ Leave it for a while and see how.
YES
1) Check if the conductor pattern between the Engine-CPU and FROM is short circuited
or open circuited.
2) Replace the LGC board if it frequently occurs.