LG 43LF5400-UB - Page 21

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Only for training and service purposes
7. Digital / Analog TV Audio
8. AV Audio
9. Component Audio
Check RF Cable & Signal
Check Tuner 3.3V Power
L500
Check Tuner I2C
AR500, R502, R503
Check IF_P/N Signal
TU501 6/7 Pin
Follow procedure
‘7. All source audio’
trouble shooting guide.
NO
NO
NO
Replace L500
Replace AR500, R502,
R503
Bad Tuner. Replace
Tuner.
OK
OK
OK
OK
Check AV Cable for damage
for damage or open conductor
Check Component Cable
for damage or open conductor.
Check JK401 Signal Line
R409 ,R406
Check JK401 Signal Line
R409 ,R406
Follow procedure
‘7. All source audio’
trouble shooting guide.
Follow procedure
‘7. All source audio’
trouble shooting guide.
NO
NO
Replace Jack
Replace Jack
OK
OK
OK
OK