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50PV400-UB, 50PV430-UC, 50PV450-UA (CHASSIS:PU14K) - LG TV Service Manual (repair manual). Page 50

Read LG 50PV400-UB / 50PV430-UC / 50PV450-UA (CHASSIS:PU14K) Service Manual online

Great Company  Great People
Check Connector and cables
JK609 (Component, AV Rear)
JK601 (RGB)
JK603 (AV Side)
Replace connector or cable if 
found damaged
N
Y
Check signal
R619 / R623 (Component1)
R606 / R608 (Component2)
R637 / R638 (RGB)
R616 / R618 (AV Rear)
R633 / R634 (AV Side)
Replace the Resistor
N
Y
Check IC1 signal
C20,C21,C22,C23,C28,
C29,C33,C34,C12,C13
Replace Capacitor
N
Y
Follow procedure All source audio 
trouble shooting 
Component / RGB / AV Audio
Trouble Shooting Guide
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