LG BUSWLJR, 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.
Check input signal format.
Is it supported?
Check AV Cable for damage
for damage or open conductor
Check JK1702, CVBS Signal Line
R1707
ok
ok
ok
No
Replace Jack
ok
Check CVBS_DET Signal
R1713
Replace R1713 or R1710
No
Check Mstar LVDS Output
Replace Mstar(IC101) or Main Board.
No
3. AV Video
Check input signal format.
Is it supported?
Check Component Cable
for damage or open conductor.
Check JK1702
Y/PB/PR signal Line
ok
ok
ok
No
Replace Jack
Check COMP_DET Signal Replace R1709 or R1712
No
Check Mstar LVDS Output
Replace Mstar(IC101) or Main Board.
ok
No
4. Component Video