LG PT-43A80 - Page 18

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2. NO SOUND (PICTURE OK)
Waveform of AV Board IC701
#47,48,50,51,53,54,56,57
at each Mode ?
NO
Check JA202 Jack
Waveform of AV Board
IC701 #27,#28,#25 ?
YES
Waveform of
MAIN1 Q022(E)
( SIF ) ?
Check
TU101
Waveform of
AV Board IC701
#67 ?
Check
around
Q706
Check around IC701
Check around AV Board
Q703,704,705
Waveform of MAIN1
IC601 #2,#4 IC602 #4 ?
Waveform of MAIN1
IC601 #7,#11 IC602 #7 ?
Check around
IC601,602
Check AV Board JA501,
Main1 P602 Connector
YES
YES
YES
YES
YES
NO
NO
<AV1,2,3,SCART INPUT> < RF >
NO
NO
NO
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