|
Welcome jim. i must say that first magnavox is probably the most beautiful color set I've seen. There is a great book written about 40 years ago entitled "The Practical Handbook of TV Repairs" written by Art Margolis. I see one occasionally in a used bookstore. This is the perfect book if you're just getting into sets. Its broken down into various sections and has a list of common problems and how to ix them. It also includes common procedures like convergence, greyscale, color adjustments, replacing parts, etc.
On to better things...
Your set has tons of capacitors that perform various jobs for each part of the set. The main large cans next to the power transformer are the input filter caps. THese take out the ripple noise in the incomming power. If these fail they can prevent voltage from getting to the rest of the set. WHen bad, they produce the nasty hum you were hearing. The rest of the caps should be replaced before you attempt to operate the set any further. If one shorts, it could damage components that would be difficult for you to find. Its really not worth taking time to pull and test each one. Most caps only have a shelf life of about 15-20 years, so using this set with 40 year old caps is not a wise choice.
As to the random picture cutting in and out, do you hear any snaping, hissing, or smell ozone? The flashes of streaks sounds as thoug you have an arcing problem in the high voltage supply. It could also be a screen or focus control that is burned. Don't use the set until the problem is isolated. Take the back off and blow all the dust out throughly. YOu may be able to see traces of arcing around the screen controls under the chassis and or inside the HV cage.
But above all please remember that these sets have anywhere from 200 to 25,000 volts lurking around inside. THe CRT stores energy like a large capacitor, so be sure to discharge the CRT before working around hazardous parts.
__________________
Jordan
|