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Main PCBs Trouble Diagnosis
A. When �No signal� in CVBS(RF, AV) 1) First check if other inputs are working -> if other inputs are not working, replace MAIN PCB 2) Checking waveforms with Color Bar Pattern(Using the oscilloscope) - Main TP(RF) : CC455, C102
- Main TP(AV) : LC205, CC444
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