LG 43LX340H - Page 11

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Only for training and service purposes
2. Digital/Analog TV Video
3. AV Video
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
Replace Mstar(IC101) or Main Board.
ok
ok
ok
No
No
No
Bad Tuner. Replace Tuner.
Check input signal format.
Is it supported?
Check AV Cable for damage
for damage or open conductor
Check JK4400, CVBS Signal Line
R242
ok
ok
ok
No
Replace Jack
ok
Check CVBS_DET Signal
R4410
Replace R4410
No
Check Mstar LVDS Output
Replace Mstar(IC101) or Main Board.
No