Quote:
Originally Posted by bandersen
No, if you have sound but absolutely no vide, I seriously doubt it's the detector. A scope should give you the answer in a few minutes. Start at the detector and go through each stage to the CRT. At some point the signal will disappear and that will be the problem point. I suspect either something is open or shorted.
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Morning Bob...do you mean move forward in the circuit between the detector and the CRT or check the entire RF/IF string? Timmy has commented it's possible to have sound but no video due to problems prior to the detector but others have commented if there's sound, your video information is getting lost somewhere between the detector and the CRT cathode. There's not much between the detector and the CRT...a couple of coils and capacitors and all have tested good. I have a resistance on the video amp pin 5 that's spot on by the Sams. I've checked physical wiring continuity from the 0.05uf cap to the halfway plugged in CRT pin 2 and that's all there as is continuity through the 2 small coils after the detector. I've tried a different 7JP4 and have the same raster/no video result. Totally stumped but I will look for the actual signal with a scope next.