LG 39LY340C, Service Manual

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