Audio Is Not Outputted Normally.(Component Audio Input) - JVC LT-32A200 Service Manual

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Audio is not outputted normally.(Component Audio input)

Pin(6) : AMP(L)-OUT
Pin(8) : AMP(R)-OUT
Pin(2) : AUDIO(L)-OUT
Pin(4) : AUDIO(R)-OUT
CN802: SP(L)
CN801: SP(R)
JK871: AUDIO(L)-OUT
JK872: AUDIO(R)-OUT
1-22 (No.YA712<Rev.002>)
Yes
Yes
Yes
No
Check the line between Pin(4, 11) of IC771 and
input terminal(JK741, JK742), and service it if
defective.
No
No
No
No
Yes
Check SP801,SP802 and their periphery circuit,
and service it if defective.
No