LG 39LY340H Service Manual page 19

7. Digital/Analog TV Audio
Check RF Cable & Signal
ok
Check Tuner 3.3V Power
L1600
ok
Check IF_P/N Signal
TU1601 6,7 Pin
ok
Follow procedure
'7. All source audio'
trouble shooting guide.
8. AV/RGB Audio
Check AV Cable for damage
for damage or open conductor
ok
Check JK1702 Signal Line
R1714,R1715
ok
Follow procedure
'7. All source audio'
trouble shooting guide.
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Only for training and service purposes
No
Replace L1600
No
Bad Tuner. Replace Tuner.
No
Replace Jack
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