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A couple things:
If that set uses the chassis I think of, it has a glass CRT and a standard power transformer power supply (not a hot chassis). The CRT can't store enough power to be fatal (unless you have health/heart problems), but it can knock you away and give you a nasty injury from that.
With that said, the rules of safety are to do as those above said, and discharge the CRT by connecting a plastic handled screwdriver to the chassis with a clip lead, and poke it under the rubber cap on the high voltage wire (the fat wire to the bell of the CRT; not on the socket). That will ground out anything in the tube. There is a faint possibility that the electrolytic cans could store a shock, but that too can't really do any damage other than embarrassment if someone is watching, LOL. It's also a general rule to keep your non-dominant hand securely in your pocket when you're doing anything on a powered circuit. That way, the theory is that the current will bypass your heart in case of a bad shock, and not enter one hand and exit the other (right across the heart), if your other hand happens to hit ground, which it might if it's just dangling or leaning on the table.
The way I got into this hobby when I was 9 or 10 years old, is I got hold of a book for the amateur; "Professional TV Repair Secrets" by Art Margolis. He wrote a lot of consumer-level booklets on TV repair, and most any of those would be a great source for the basics of not hurting yourself or the valuable TV. Try eBay or Amazon for those. Art's books are mostly from the 50s and 60s, and include all the tips on late 40s and early 50s TVs.
NOTE: There are a few Philco TVs from the late 40s and early 50s, and a DuMont from '46, which have a DEADLY danger. They have a "direct step-up" power supply, which has an oil-filled capacitor in the power supply which is capable of a fatal shock. Yours isn't one of those, as far as I remember, but generally you need to watch out for oil-filled capacitors in power supplies, as they can be a few uF at up to 10,000 volts.
Charles
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Collecting & restoring TVs in Los Angeles since age 10
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