1978 Sylvania console problems

[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.

[jg6364]

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.

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.

[jg6364]

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.

I found a few cracked solder joints on the shielding but that was it. I fixed those and cleaned another connection on the module pins. At times it plays a little better but still not fixed. Thanks for all the info on this type of set. I really appreciate it.





The top shielding was removed for the picture below.