LG 39LY340H Service Manual page 16

2. Digital/Analog TV Video
Check RF Cable & Signal
ok
Check Tuner 3.3V Power
L1600
ok
Check IF_P/N Signal
TU1601, 6/7 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 JK1702, CVBS Signal Line
R1722
ok
Check CVBS_DET Signal
R1713
ok
Check Mstar LVDS Output
4. RGB Video
Check input signal format.
Is it supported?
ok
Check RGB Cable
for damage or open conductor.
ok
Check JK705
R/G/B signal Line
ok
Check RGB_DET Signal
ok
Check Mstar LVDS Output
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Only for training and service purposes
No
Replace L1600
No
Bad Tuner. Replace Tuner.
No
Replace Mstar(IC101) or Main Board.
No
Replace Jack
No
Replace R1713
No
Replace Mstar(IC101) or Main Board.
No
Replace Jack
No
Replace R732
No
Replace Mstar(IC101) or Main Board.
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