Quote:
Originally Posted by ELzekio
If I wanted to take a closer look and touch on the solder joints should I be real concerned about getting an electric shock from the television. I know the process of De energizing the CRT is pretty strait forward, but it still concerns me because if you mess one small thing up you can be killed.
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None of the board joints are at or near HV especially if the set is unplugged and has been off for 10 seconds. The highest voltage HV connection is the red wire from the fly to the top of the CRT....It should be around 25KV. Current kills, NOT voltage! The 25KV supply can't kill you, unless you have a heart condition....Trust me, I've gotten bit by the HV supplies of several TV sets and lived to type this...It just hurts bad (but don't last like a solder burn), and may trigger your reflexes....You are in more danger messing with the 120VAC from your wall outlets (since you can draw over 20A and not trip the breaker) than the 25KV from a TV. It takes about 30mA to kill. The average CRT draws 1-3mA MAX and the supplies are not designed to source any more current than the CRT can use.
A good portion of sets made after 1973 had internal bleeder resistors that would discharge the CRT within ~ 5 seconds of switching the set off.