Radf Related Service Call - Toshiba e-STUDIO2820C Service Handbook

6.2.16

RADF related service call

No service call for the RADF (MR-3018).
6.2.17 Circuit related service call
[C5A0] SRAM board not connected (LGC board)
[C5A1] SRAM board data abnormality (LGC board)
(1) Check if the connector CN423 on the IMG board and the connector CN354 on the LGC board
are completely inserted.
(2) Check if the connector pin between the IMG board (connector CN423) and the LGC board (con-
nector CN354) is disconnected.
(3) Check if the connector CN422 on the IMG board and the connector CN135 on the SYS board are
completely inserted.
(4) Check if the connector pin between the IMG board (connector CN422) and the SYS board (con-
nector CN135) is disconnected.
(5) Check if the conductor patterns on the IMG board, LGC board and SYS board are short circuited
or open circuited.
(6) Replace the LGC board if no problem is found in steps from (1) to (5) above.
(7) If the problem is not corrected with the replacement of the LGC board, reinstall the removed LGC
board and replace the IMG board.
(8) If the problem is still not corrected with the replacement of the IMG board, reinstall the removed
IMG board and replace the SYS board.
[C900] Connection error between the SYS board and the LGC board
(1) Check if the SRAM board is installed securely.
(2) Check if the SRAM board is short circuited or open circuited.
(3) Check if the battery on the SRAM board has not run out.
(4) Replace the SRAM board.
(5) Replace the LGC board.
[C940] Engine-CPU abnormality
Does service call still occur even after turning OFF the main switch then back ON?
NO Leave it for a while and see how.
YES
1. Check if the conductor pattern between the Engine-CPU and FROM, SRAM is short
circuited or open circuited.
2. Replace the LGC board if it frequently occurs.
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