It’s really not that dangerous. There’s a big capacitor called the flyback capacitor which can store a deadly amount of energy. You disconnect the power (obviously) and then discharge that cap and everything else is relatively safe. To discharge a capacitor, bridge the leads with an electricians screwdriver. If you don’t like sparks, hold a resistor with pliers between the two leads. (It will go slower but also get hot AF.)
The capacitors are the same ones that are in every desktop PC power supply.
The flyback is a complex transformer with the thick cable sending the high voltage to the tube’s second anode.
The CRT itself can act like a giant capacitor. Eventually they figured out how to bleed the charge out when the TV is off.
1990s-2000s tubes: I discharge but don’t worry too much. 1980s-1990s tubes: I discharge several times, over the course of an hour or two. Those Sanyos that Nintendo used hold a nasty charge that comes out with a big SNAP!
The way they bleed the charge off when the TV is powered off is through a very high resistance resistor. This works perfectly well most of the time, but those resistors can and do fail. The same is true for microwaves, which also have flyback circuits. Always treat these things like the bleedoff resistor has failed.
Well beyond, I believe. Like, even trying to repair one can kill you
It’s really not that dangerous. There’s a big capacitor called the flyback capacitor which can store a deadly amount of energy. You disconnect the power (obviously) and then discharge that cap and everything else is relatively safe. To discharge a capacitor, bridge the leads with an electricians screwdriver. If you don’t like sparks, hold a resistor with pliers between the two leads. (It will go slower but also get hot AF.)
The capacitors are the same ones that are in every desktop PC power supply.
The flyback is a complex transformer with the thick cable sending the high voltage to the tube’s second anode.
The CRT itself can act like a giant capacitor. Eventually they figured out how to bleed the charge out when the TV is off.
1990s-2000s tubes: I discharge but don’t worry too much. 1980s-1990s tubes: I discharge several times, over the course of an hour or two. Those Sanyos that Nintendo used hold a nasty charge that comes out with a big SNAP!
The way they bleed the charge off when the TV is powered off is through a very high resistance resistor. This works perfectly well most of the time, but those resistors can and do fail. The same is true for microwaves, which also have flyback circuits. Always treat these things like the bleedoff resistor has failed.