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19LV2500-UA (CHASSIS:LA01T) - LG TV Service Manual (repair manual). Page 42

Read LG 19LV2500-UA (CHASSIS:LA01T) Service Manual online

3. Analog TV Video
Check RF Cable & Signal
Check Tuner 3.3V Power
L3703
Replace L3703
Check Tuner 1.2V Power 
IC3703 2 pin : 1.2V
Check CVBS Signal
TU3702 11 Pin
Replace IC3703 .
Check Tuner 5V Power
L3702
Check Mstar LVDS Output
Replace Mstar(IC101) or Main Board.
ok
ok
ok
ok
ok
No
No
No
No
No
No
Bad Tuner. Replace Tuner.
Replace L3702
ok
Check IC7952, IC7861
Replace IC7952, IC7861
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