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0 pointsKaiserPro1y ago0 comments

Mains will still kill you, even if its not 3.3kv or what was needed to run a CRT.

Its always best to work out where the mains PSU is, and either cover/isolate it so that you don't touch it by accident. Even if turned off, there is a non-insigificant risk that there is either mains power lying around or some other large charge/current ready to bite.

THe back of the inlet is also tends to be a hazard, so be really careful around there too.

0 comments

i_am_proteus1y ago

Can't echo this enough. If you're working on anything that has been connected to residential mains... use a multimeter. They're cheap! Check the power supply for residual voltage from PSU caps. Discharge them safely before working on the equipment!

maayank1y ago

How do you discharge them safely?

i_am_proteus1y ago

The correct answer is "bleeder resistor."

The other answer is "pliers."

(Make a connection across the terminals that have a voltage difference)

avidiax1y ago

If the maximum voltage is within range, a neon line tester with the button grounded should work well. When the light goes out, the remaining voltage is below the sustain voltage of the neon lamp.

That kind of tester is usually built into a screwdriver and often comes free with some electrical items. They are maybe $2 otherwise.

j / k navigate · click thread line to collapse

0 pointsKaiserPro1y ago0 comments

Mains will still kill you, even if its not 3.3kv or what was needed to run a CRT.

THe back of the inlet is also tends to be a hazard, so be really careful around there too.

0 comments

i_am_proteus1y ago

maayank1y ago

How do you discharge them safely?

i_am_proteus1y ago

The correct answer is "bleeder resistor."

The other answer is "pliers."

(Make a connection across the terminals that have a voltage difference)

avidiax1y ago

If the maximum voltage is within range, a neon line tester with the button grounded should work well. When the light goes out, the remaining voltage is below the sustain voltage of the neon lamp.

That kind of tester is usually built into a screwdriver and often comes free with some electrical items. They are maybe $2 otherwise.

j / k navigate · click thread line to collapse