50PZ570B-SB (CHASSIS:PB12A) - LG TV Service Manual (repair manual). Page 78

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Y
Check Jack JK1100/JK1101/JK801
N
Y
Check Signal
C305,C306,C307,C308,C309,C310,C
311,C312,C313,C314,C315,C316,C30
0,C337,C338
N
Check equipment / Replace Jack
Check Video Output
Replace one of
C305,C306,C307,C308,C309,C310
,C311,C312,C313,C314,C315,C31
6,C300,C337,C338
& Recheck
N
Follow procedure external input 
video trouble shooting
Y
Follow procedure All source audio 
trouble shooting
N
Maybe BCM35230 audio block has 
problems. Replace It
12. Component / RGB / AV Audio Trouble Shooting
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