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32LV3400-SA (CHASSIS:LJ01U) - LG TV Service Manual (repair manual). Page 43

Read LG 32LV3400-SA (CHASSIS:LJ01U) 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 IC406,IC410
Check Mstar LVDS Output
Replace Mstar(IC101) or Main Board.
ok
ok
ok
ok
ok
No
No
No
No
No
Replace IC406,IC410
No
Bad Tuner. Replace Tuner.
Replace L3702
ok
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