Toshiba D-VR40SF Service Manual page 31

"C"
Are the analog audio signals inputted to each pin
of IC1513?
IC1513 2PIN AUDIO (L)-OUT
IC1513 6PIN AUDIO (R)-OUT
Do Pin(26,29) of IC501 become "H" level?
Are the analog audio signals outputted to each pin
of IC1513?
IC1513 1PIN AUDIO (L)-OUT
IC1513 7PIN AUDIO (R)-OUT
Are the analog audio signals inputted to each pin
of IC1508?
IC1508 1PIN AUDIO (L)-OUT
IC1508 13PIN AUDIO (R)-OUT
Are the analog audio signals outputted to each pin
of IC1508?
IC1508 15PIN AUDIO (L)-OUT
IC1508 14PIN AUDIO (R)-OUT
Are the analog audio signals inputted to each pin
of IC1518?
IC1518 6PIN AUDIO (L)-OUT
IC1518 12PIN AUDIO (R)-OUT
Are the analog audio signals outputted to each pin
of IC1518?
IC1518 21,25PIN AUDIO-OUT 1 (AV1)
IC1518 22,26PIN AUDIO-OUT 2 (AV2)
Are the audio signals outputted to the specific
output terminal?
Are the audio signals outputted to the audio
terminal (JK1502)?
Are the audio signals outputted to the audio
terminal (JK2001)?
Are the audio signals outputted to the audio
terminal (JK1505)?
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Check each line between each pin of CN1502
and each pin of IC1513, and service it if defective.
No
CN1502 14PIN → IC1513 2PIN AUDIO(L)-OUT
CN1502 16PIN → IC1513 6PIN AUDIO(R)-OUT
No
If Pin(26) of IC501 become "L" level, replace
DVD MECHANISM & DVD MAIN BOARD
ASSEMBLY.
If Pin(29) of IC501 become "L" level, replace
IC501.
No
Is 10V voltage supplied to Pin(8) of IC1513?
Yes
Replace IC1513.
Check each line between each pin of IC1513
and each pin of IC1508, and service it if defective.
No
IC1513 1PIN → IC1508
IC1513 7PIN → IC1508 13PIN AUDIO(R)-OUT
Is 5V voltage supplied to Pin(16) of IC1508?
No
Is -5V voltage supplied to Pin(7) of IC1508?
Yes
Replace IC1508.
Check each line between each pin of IC1508
and each pin of IC1518, and service it if defective.
No
IC1508 15PIN → IC1518
IC1508 14PIN → IC1518 12PIN AUDIO(R)-OUT
No
Is 12V voltage supplied to Pin(2,4) of IC1518?
Yes
Replace IC1518.
Check the periphery between Pin(21,25) of IC1518
and the audio terminal (JK1502), and service it if
No
defective.
Check the periphery between Pin(22,26) of IC1518
No
and the audio terminal (JK2001), and service it if
defective.
No
Check the periphery between Pin(1,7) of IC1513
and the audio terminal (JK1505), and service it if
defective.
1-10-10
No
Check the P-ON+10V line and
service it if defective.
1PIN AUDIO(L)-OUT
No
Check the AL+5V(1) and
AL-5V line, and service it if
defective.
6PIN AUDIO(L)-OUT
No
Check the AL+12V line and
service it if defective.
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