1-22 (No.YA712<Rev.002>)
Are the audio(L/R) signals inputted to each pin of
CN301?
Replace Digital Main PWB Unit.
No
Ye s
Audio is not outputted normally.(Component Audio input)
FLOW CHART NO.2
Are the audio(L/R) signals inputted to the Pin(4, 11)
of IC771?
Check the line between Pin(4, 11) of IC771 and
input terminal(JK741, JK742), and service it if
defective.
No
Check SP801,SP802 and their periphery circuit,
and service it if defective.
Are the audio(L/R) signals inputted to the Pin
(1, 44)
of IC801?
Are the audio(L/R) signals inputted to the Pin(3, 5)
of IC871?
Ye s
Ye s
No
No
Are the audio(L/R) signals outputte
d to the Pin(1, 2)
of CN801 and CN802?
Are the audio(L/R) signals outputte
d to the audio
output terminal?
Check IC801 and their periphery circuit, and
service it if def
ective.
CN802: SP(L)
CN801: SP(R)
JK871: AUDIO(L)-OUT
JK872: AUDIO(R)-OUT
No
Ye s
Check the line between Pin(6, 8) of CN301 and
Pin(1, 44) of IC801, and service it if def
ective.
Check the line between Pin(2, 4) of CN301
and
Pin(3, 5) of IC871, and ser
vice it if de
f
ective.
No
Check the line between Pin(1, 7) of IC871 and audio
output terminal(JK871, JK872), and service it if
defective.
Pin(6) :
Pin(8) :
Pin(2) :
Pin(4) :
AMP(L)-OUT
AMP(R)-OUT
AUDIO(L)-OUT
AUDIO(R)-OUT
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