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Originally Posted by blue_lateral
The flyback is in that big can at the other end of the chassis. John
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I'd be careful around the flyback. Some very old TVs had what was referred to as a "doorknob" high-voltage capacitor which could and often did store a lethal charge for months or even years after the set was turned off and even unplugged. Be sure you discharge this capacitor, if your set has one, to ground (ordinarily the chassis) and unplug the TV, in reverse order, before doing anything around the flyback transformer or anywhere in the high-voltage cage. Later designs such as your '65 Magnavox, et al. used the aquadag coating of the CRT (the coating on the bell of the tube, where the HV lead with the large suction cup connects) as the HV capacitor; this also can hold a charge for a very long time, and it can be lethal as well if not discharged before work on the HV system is begun. If the HV charge doesn't kill you it can throw you across a room if you aren't careful. It is always much better to be safe than sorry.
BTW, don't try to test for the presence of high voltage by arcing the HV lead to the chassis with the set on. This was a trick often used in TV's early days to check for proper operation of the high-voltage system, but it could prove destructive in present-day or vintage sets, especially those with solid-state circuits. Much better and safer to use either an HV probe with a meter, or, lacking that, a neon bulb on a wooden stick held near the HV cage. The latter will glow if the horizontal oscillator and other sections of the HV stages in your set are working. The HV probe and meter will not only tell you if there is high voltage, but whether or not you have enough to make a bright raster (the bright light on your screen which is the basis for a good picture).