47LD920 (CHASSIS:LD01I) - LG TV Service Manual (repair manual). Page 101

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Check the CVBS Cable
YES
Check MAIN B’D
C2011, C2012
MAIN B’D
C2011 (Right Sound)
C2012 (Left Sound)
signal ?
YES
NO
Replace MAIN B’D IC 100
AV3 Video OK ?
YES
Check MAIN B’D JK402
Replace MAIN B’D JK402
NO
YES
Making 
Revision 
2009. 2 . 1
23/34
LCD TV
Symptom
AV3 No Audio Problem
<Except for 19/22LU40**, 19/22LU50, 19/22LH20**)
26~42 LH2000
32~47LH3000/LH4000/LH5000
26LU5000
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