LG 43LF5400-UB - Page 17

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Only for training and service purposes
2. Digital / Analog TV Video
3. AV Video
Check RF Cable & Signal
Check input signal format.
Is it supported?
Check AV Cable for damage
for damage or open
conductor
Check Tuner 3.3V Power
L500
Check JK401,
CVBS Signal Line
R120
Check IF_P/N Signal
TU501 6,7 Pin
Check CVBS_DET Signal
Check Mstar LVDS Output
Check Mstar LVDS
Output
NO
NO
NO
NO
NO
NO
Replace L500
Replace Jack
Bad Tuner. Replace
Tuner.
Replace AR401 or R110
Replace Mstar(IC102)
or Main Board.
Replace Mstar(IC102)
or Main Board.
OK
OK
OK
OK
OK
OK
OK