LG 40LH5300 Service Manual page 15

2. Digital / Analog TV Video
Check RF Cable & Signal
OK
Check Tuner 3.3V Power
L500
OK
Check IF_P/N Signal
TU501 7, 8 Pin
OK
Check Mstar LVDS Output
3. AV Video
Check input signal format.
Is it supported?
OK
Check AV Cable for damage
for damage or open
conductor
OK
Check JK401,
CVBS Signal Line
R120
OK
Check CVBS_DET Signal
OK
Check Mstar LVDS
Output
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
NO
Replace L500
NO
Bad Tuner.
Replace Tuner.
NO
Replace Mstar(IC102)
or Main Board.
NO
Replace Jack
NO
Replace AR401 or R110
NO
Replace Mstar(IC102)
or Main Board.
- 15 -
LGE Internal Use Only