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Properly discharge a psu before opening?

post #1 of 15
Thread Starter 
never opened a psu before. I want to discharge the capacitors of any residual juice. My idea was to connect a fan to one of the molexes and then bridge green to black with a piece of wire, to jump the psu. Will this work?

If not please explain the correct method. Thanks
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post #2 of 15
That would probably do it but be careful.

http://www.electronicsforu.com/elect...e%20Capacitors
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post #3 of 15
Quote:
Originally Posted by CattleRustler View Post
never opened a psu before. I want to discharge the capacitors of any residual juice. My idea was to connect a fan to one of the molexes and then bridge green to black with a piece of wire, to jump the psu. Will this work?

If not please explain the correct method. Thanks
That will work but it would probably take a while to completely discharge them. Maybe a day, depending on the size of the caps and fan.

A faster and better way would be to open up the PSU then hold up a resistor (say about 10ohms/800w to be safe) to the back of the PCB where the cap is soldered on. When the resistor heats up, remove it for a few seconds then put it back on till it heats up again. And keep repeating that until it no longer heats up. Then go on to the next cap. In a few minutes you'll have everything discharged.
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post #4 of 15
Just takes a miil amp to kill you,use write hand so its not a direct path to yourheart,my dad worked on older tv's,that what healways said.
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post #5 of 15
Be carefull, and wear rubber gloves (one's without any holes in them)
post #6 of 15
LOL

One time i opened an old dell PSU that was already fried, took the fan out and put the - and + leads directly into an outlet and BOOM! and POP! smelled like fried electronics and killed the fan. it was scary but cool at the same time. It's cool, i lost no money, it was a school psu that was given to me for my experiments.
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post #7 of 15
switch your rig off and leave it for for around 48 hours..then just flick the switch on the psu on and off quite a few times, that should do it.
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post #8 of 15
Thread Starter 
well, I am glad I was strapped for time and no one replied by the time I went downstairs, or you wouldda scared me out of it - ha ha. I did what I said but the fan didnt spin at all. So I opened the lid taped off the inside of the lid which was separate from the rest of the unit, and put the lid back on. I'm still here so I guess it all went well

thanks for the replies - case closed
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Chuckle2Tits
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post #9 of 15
So it's not really safe to open up a PSU after turning it off, and trying to power on with the case switch a few times...?
post #10 of 15
Hey, I opened the PSU perfectly fine. Didn't really touch anything though. Still, it worked when I put the cover back on and I didn't get hurt, so win-win.
    
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