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47SL90QD-AA (CHASSIS:LB91L) - LG TV Service Manual (repair manual). Page 56

Read LG 47SL90QD-AA (CHASSIS:LB91L) Service Manual online

Making 
Revision
2009. 2 . 1
16/25
LCD TV
Symptom
AV1 No Audio Problem
AV1 Video OK ?
Revision 
Check the RCA Cable
YES
YES
Check MAIN B’D JK402
Replace MAIN B’D JK402
NO
YES
MAIN B’D
C2011 (Right Sound)
C2012 (Left Sound)
signal ?
YES
NO
Replace MAIN B’D IC 100
Check MAIN B’D
C229, C230
NO
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