Toshiba 4511 User Manual
e-STUDIO3511/4511 TROUBLESHOOTING
5 - 52
November 2003 © TOSHIBA TEC
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 CN338 on the LGC board is completely inserted or not disconnected.
(3) Check if the harness connecting the SYS board (CN117) and the LGC board (CN338) is open
(2) Check if the connector CN338 on the LGC board is completely inserted or not disconnected.
(3) Check if the harness connecting the SYS board (CN117) and the LGC board (CN338) 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.
(5) Replace the SYS board.
(6) 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 is short circuited or open
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.
[C950] Memory of the LGC board abnormality, ID abnormality
(1) Check if the connectors CN360 and CN 331 on the SYS board are completely inserted or not
disconnected.
(2) Check if the connector J434 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).
(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).