Daewoo LM32L1 Service Manual page 17

Main PCBs Trouble Diagnosis
A.When "No signal"in CVBS(RF, Monitor Out)
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) : CE103
- Main TP(Monitor Out) : RCA12
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