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LG 20LF430A Service Manual page 22

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10. Abnormal sound (AV)-Main PCBA
Abnormal sound (AV)
1
Put into AV cable completely?
2
Is waveform at C520,C521
Change IC501
WAVEFORMS
2
C520,C521(audio in)
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LG Electronics. Inc. All right reserved.
Only for training and service purposes
NO
YES
NO
YES
Insult AV cable tight
Check Line between JK101 and IC501
is open or short, Another is
change AV cable
- 22 -
LGE Internal Use Only

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