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26LD340H (CHASSIS:LA06F) - LG TV Service Manual (repair manual). Page 51

Read LG 26LD340H (CHASSIS:LA06F) Service Manual online

AV/Component/RGB-PC Audio(in)Trouble shooting guide  
Check JK3801, JK1102.
Can you see the normal waveform?
NO
JK3801, JK1102. may have problem. Replace this Jack.
YES
Check the input of Mstar(IC101).Measure waveform at 
C236,C237,C238,C239,C4059,C4060,C244,C245
because it’s more easy to check. Can you see the normal waveform?
NO
After checking audio signal line, you should decide to replace item or not.
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