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View Full Version : how dangerous is taking out a PCU fan?


computerman
08-09-2004, 12:42 AM
just kinda wondering yes i know stay away from capacitors

dworld
08-09-2004, 05:12 AM
i would of put live outlet but as long as you stay away from the capacitors and u dont have it plugged in you should be find so i gave it a 5

modmaniac
08-09-2004, 07:42 AM
Yea, as many have already said in the forums, DONT LICK THE CAPACITORS! lol

jkaiser
08-10-2004, 06:20 AM
I have taken out several PSU fans before. One time I left the open power supply on the ground and went to grab a bite to eat. My dad saw it and thought it was garbage so he reached his hand IN the PSU and picked it up to throw it out.....luckily he didnt get zapped

Migit109
08-10-2004, 09:25 AM
how bad would it be if u got zapped after letting i t sit for 30 min

jkaiser
08-10-2004, 10:07 AM
From what I have been told, just as bad as if it sat for 30 seconds. :P

I could be wrong though

VanZero
08-10-2004, 10:56 AM
Hehe...

A friend and I took apart an old PSU I had one day.

Has 500v capacitors in it.

You touch the board=You get hurt very badly.

Please kids, don't pee on an electric fence, let alone lick the capacitors.

The fans are easy to take out though. You unscrew it and snip the wires. (I use safety scissors even though it should be relatively safe.

computerman
08-10-2004, 11:02 AM
ya my next question was i want to use the fan in my computer so would i have to wire it to a molex?

[GF]Burke
08-10-2004, 11:03 AM
Originally posted by modmaniac@Aug 9 2004, 01:42 PM
DONT LICK THE CAPACITORS!
;)


Just wire it to any 12v wire.. molex is fine.. dont need a molex.. just wire. (the fan is probaby 12v - look on the back of it - if so, use yellow wire.. if its only 5v, use red wire)

This (http://www.ramsinks.com/7vmod.aspx) might help ya.

ety
08-10-2004, 02:48 PM
I've gotten zapped by alot of electric fences. I've gotten shocked about 5 times at two summers worth of being at a farm camp (10 people made a chain and a person at each end grabed the fence and everyone got shocked) and at a summer camp in Germany my Dorm was down a road and a cow pasture was next to it and I was runing to get something from the dorm and I fell the down and slid into the electric fence, it doesn't realy hurt that much.

jkaiser
08-10-2004, 02:59 PM
I worked on a farm one summer. One day there was a short in the electric fence, and I was given the task of finding where it was. So, I did it the easiest way I could think of. :D

Is it here.....OUCH.....works there
How about here....OUCH...nope
Here...OUCH....no way...
and so on..... :P

ety
08-10-2004, 03:23 PM
My Dad got a little pen like thing for $5 and if its near electristy it lights up and beeps.(Might have been a little better)

computerman
08-10-2004, 03:52 PM
i've shocked my self lots of times... nothing to big just like batteries an such... i take apart things like crazy but usaully i take out the batteries or unplug it but sometimes i forget or just decide to see if i can tolerate it.. talk about living life on the edge lol... electric fence haha that musta been anoying

anode
08-10-2004, 04:13 PM
Here we go again. Yeah, the caps hold the juice. But, but, but, the can is grounded, and insulated, so touching the cap, itself, not NOT a prob. The leads from them is where the possible danger is. But then again, thats on the bottom of the PCB, which you probably wouldn't remove.

If you are really scared and paranoid when taking out the PCB, lift it by the heat sinks and plop it down on a piece of tin foil. that will short out all the caps. Then look for the holes blown throgh the foil. I'd bet dollars to donuts that you won't find any.

Or ground out the DC leads from the bridge rectifer.

ety
08-10-2004, 05:19 PM
ANother fun story: I was taking apart one of the ritz "disposable" digital camera and When I went to take out the last screw I touched the capacitor for the flash and then the flash wewnt off and it seemed like a Flashbang grendade and it fried the camera.

Slayer2k3
08-10-2004, 07:56 PM
Most of the higher quality psu's now have a discharge circuit built in. so that when you either unplug the power cord, or flip the psu power switch, it will discharge the caps. try it on yours, unplus the psu power, then listen for a few seconds for a high pitched noise. that be the caps dying off.

If it dont work, usually, unplug the power cord, let it sit a few socond, n hit the comp power switch, wait a few more seconds, and do it again. the first time you hit the switch, you will see fans move, and maybe even LEDs light up. nothing should happen on the second try.

hope that helps