Read LG 50LN5420-TC (CHASSIS:LB36B) Service Manual online
- 17 -
8. Digital/Analog TV Audio
9. AV Audio
10. Component Audio
Check RF Cable & Signal
Follow procedure ‘7. All source audio’
trouble shooting guide.
ok
Check Tuner 3.3V Power
L3703
Replace L3703.
Check Tuner 1.8V Power
IC3703 2 pin : 1.8V
Check IF_P/N Signal
TU3700 10/11 Pin
Replace IC3703.
ok
ok
ok
No
No
No
Bad Tuner. Replace Tuner.
Check AV Cable for damage
for damage or open conductor
Check JK1702 Signal Line
R1714,R1715
ok
ok
No
Replace Jack
Follow procedure
‘7. All source audio ’
trouble shooting guide.
Check AV Cable for damage
for damage or open conductor
Check JK1702 Signal Line
R1714,R1715
ok
ok
No
Replace Jack
Follow procedure
‘7. All source audio ’
trouble shooting guide.
Click on the first or last page to see other 50LN5420-TC (CHASSIS:LB36B) service manuals if exist.