Quote:
Originally Posted by sampson159
looks more like a horizontal oscillator problem.the first module is known for cold solder joints around the if ground plate.its in the center of the module.the 3rd module is horizontal/vertical.also been known to have cold joints.is this the original black matrix crt?they make a pretty picture when they are good.didnt last long,usually about 3-4 years but still the best picture.a flat chassis zenith with this crt would be the ultimate set!good luck with this set.
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Yes it's the original CRT. It's dated February 1978, same as the cabinet. I will check the 1st module again. I've checked the third module, could not find any bad solder joints. I even checked the electrolytic caps. They all checked between 5 to 10% tolerance.