LG 43LX340H - Page 14

- 14 -
LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
7. Digital/Analog TV Audio
Check RF Cable & Signal
Check Tuner 3.3V Power
L3701,L3704
Replace L3701,L3704
Check IF_P/N Signal
TU3700, 6/7 Pin
Check Mstar LVDS Output
ok
ok
ok
No
No
Bad Tuner. Replace Tuner.
8. AV/RGB Audio
Check AV Cable for damage
for damage or open conductor
Check JK4400 Signal Line
R4408, R4409
ok
ok
No
Replace Jack
Follow procedure
‘7. All source audio’
trouble shooting guide.