LG 60PZ550 Service Manual page 48

Analog TV Video Trouble Shooting
Check RF Cable
Y
Check Tuner 5V,7V Power
IC404(7V),IC406(5V)
Y
Check CVBS signal
TU1400 #11 Pin
Y
Replace BCM3549XS(IC501)
Great Company Great People
N
Replace IC404 or IC406
N
Replace Tuner(TU1400)
< CVBS waveform – sample >
- Defend on the input signal.
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