LG 22LV2500 Service Manual page 41

2. Digital TV Video
Check RF Cable & Signal
ok
Check Tuner 5V Power
L3702
ok
Check Tuner 3.3V Power
L3703
ok
Check Tuner 1.2V Power
IC3703 2 pin : 1.2V
ok
Check IF_P/N Signal
TU3702 17/18 Pin
ok
Check Mstar LVDS Output
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Only for training and service purposes
No
Check IC7952, IC7861
No
Replace L3703
No
Replace IC3703
No
Bad Tuner. Replace Tuner.
No
Replace Mstar(IC101) or Main Board.
No
Replace IC7952, IC7861
ok
Replace L3702
LGE Internal Use Only