Toshiba e-STUDIO5540C Service Manual page 134

Check item
SYS board
Replace parts
SLG board
SYS board
[C940] Engine-CPU abnormality
Classification
Circuit related service call
Check item
LGC board
Replace parts
LGC board
[C962] LGC board ID abnormality
Classification
Circuit related service call
Check item
LGC board
IMG board
Switching regulator
Harness
Replace parts
LGC board
IMG board
[C963] Connection detection error between the IMG board and the LGC board
Classification
Circuit related service call
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• Connector check (CN135)
• Board check
• Does service call still occur even after turning OFF the
main power switch then back ON?
• Check if the conductor pattern between the Engine-CPU
and FROM, SRAM is short circuited or open circuited.
LGC board ID abnormality
• Connector check (CN304, CN319, CN320, CN331)
• Board check
• Connector check (CN426, CN423, CN424, CN426)
• Board check
• Connector check (CN403)
• Connector check
• Harness check
If the problem is not corrected with the replacement of the
LGC board, reinstall the removed LGC board and replace the
IMG board.
If the problem is still not corrected with the replacement of the
IMG board, reinstall it and ask a specialist to repair it.
(Abnormal ID)
3.3V output from the IMG board not detected on the LGC
board
e-STUDIO5540C/6540C/6550C/5560C/6560C/6570C
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Measures
Remarks
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Measures
Remarks
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Measures
Remarks
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ERROR CODE and TROUBLESHOOTING
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