converted ATX power supply help
 

I just converted my power supply and everything was working fine and had a output of 12v. when I plugged in my charger (the polarity was correct) the power supply went dead. anyone know whats going on?

you need to have the charger plugged in when you turn it on

it was. the fans only spun for a second and stopped. but i know power is going through it cause I got shocked....

if its shocking you, you have other issues...


somthing is wired wrong, or it is a bad psu

no. its neither of those cause I've checked the wiring and I tested the PS before I bought it.

Like stated previously, it shouldn't be shocking you. Got any pics of this converted power supply? Is it possible that your positive post is touching the grounded case and causing a short?

ok so I found a blown capacitor.....
http://i868.photobucket.com/albums/a...8/DSC03809.jpg

heres the conversion. I took it off the board to look around.
http://i868.photobucket.com/albums/a...8/DSC03810.jpg

The blown cap is the result of another problem. Still guessing that you've got a short somewhere. Is the positive post isolated from the case?

ya. the posts are fully insulated with nylon. I have a resistor on there but idk if i wired it right or not. but impretty sure that they dont have a certain polarity

http://www.radioshack.com/product/in...ductId=2062290

Do you remember what you were touching when it shocked you? Can you take a pic of the ps from overhead? I don't see anything in the provided pics that's obvious anyway.

Well I remember that I was reaching between the heatsinks and and I guess I touched the purple wire that was exposed.

http://i868.photobucket.com/albums/a...8/DSC03812.jpg
http://i868.photobucket.com/albums/a...8/DSC03811.jpg

I suppose it's possible then that the exposed purple wire touched a heatsink and shorted out the cap. I would replace the cap, tape up the purple wire, and hope for the best. This time it might be best to take some readings with a multimeter before you plug anything into the ps.

Your ps looks different than the ones I've been working with. On the last few that I've converted, I've actually taken the board out and unsoldered all of the extra wires and removed them from the case. Really cleans things up on the inside.

Blown cap is probably the result of this power supply sitting around unused for years on end. Capacitors (especially electrolytics) do not take well to inactivity. Powering them up after extend non use sometimes results in their blowing their little brains out as your picture shows. This can also result in high voltage AC appearing where it shouldn't be.

that might be the problem since I bought this power supply at a small computer shop