Read LG 22LV255C-UA (CHASSIS:LA0AA) Service Manual online
9. Digital TV Audio
Check RF Cable & Signal
Follow procedure
‘8. All source audio’
trouble shooting guide.
ok
Check Tuner 3.3V Power
L3703
Replace L3703
Check Tuner 1.2V Power
IC3703 2 pin : 1.2V
Check IF_P/N Signal
TU3702 17/18 Pin
Replace IC3703
Check Tuner 5V Power
L3702
ok
ok
ok
ok
No
No
No
No
Bad Tuner. Replace Tuner.
Check IC7952, IC7861
Replace IC7952, IC7861
No
Replace L3702
ok
Click on the first or last page to see other 22LV255C-UA (CHASSIS:LA0AA) service manuals if exist.