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50PZ540-UB, 50PZ550-UA (CHASSIS:PU13A) - LG TV Service Manual (repair manual). Page 54

Read LG 50PZ540-UB / 50PZ550-UA (CHASSIS:PU13A) Service Manual online

Great Company  Great People
AV Video Trouble Shooting
Check input signal format
Is it supported?
Check signal
R105(Rear AV),  R106 (Side AV)
Replace Resistor
Y
N
Check AV port of JK100 (Rear)
Check JK101 (Side)
Replace or reseat connector
Y
N
Y
Replace BCM3549XS(IC501)
Check AV Cable / S-Video Cable for damage or 
open conductors
Y
21/37
※ Measured signals depend on the input signal.
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