1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Electronics Discharging PSU Capacitors

Discussion in 'Modding' started by SJH, 11 Feb 2004.

  1. SJH

    SJH Minimodder

    Joined:
    24 Dec 2003
    Posts:
    1,427
    Likes Received:
    5
    I'm going to be rehousing a PSU soon and I am aware of the dangerous voltages that are in the capacitors inside.

    Instead of just being careful not to touch them (which will be difficult), is there a way of discharging them to make them safe to touch?

    Thanks!
     
  2. TheEclypse

    TheEclypse What's a Dremel?

    Joined:
    11 Aug 2003
    Posts:
    407
    Likes Received:
    1
    If its plugged into your computer, keep pressing the on/off button. if its not, connect the green wire to the ground on the atx connector (i think its green anyway, check it).
     
  3. ConKbot of Doom

    ConKbot of Doom What's a Dremel?

    Joined:
    2 Jul 2003
    Posts:
    2,160
    Likes Received:
    6
    keep it plugged into the mobo, shut down the computer, or restart into DOS if you can do it easily (I think the xp command prompt will work if you get to it by hitting f8 while booting), unplug the psu, push the power button, it may come on momentarily, wait 1 min and push the power button. The caps should be pretty empty by then.

    Without a mobo, short out the green wire on the ATX connector to a black one and wait for a minute or so.

    Some one should sticky this or another one of the PSU discharging threads.
     
  4. biff

    biff What's a Dremel?

    Joined:
    8 Jan 2004
    Posts:
    1,253
    Likes Received:
    2
    Just as a test...I had two psu lying around so I powered them up and by the time i got the case off as fast as i could the caps were discharged on both psu's.
     
  5. Altron

    Altron Minimodder

    Joined:
    12 Dec 2002
    Posts:
    3,186
    Likes Received:
    61
    For an even easier way, tuirn your computer on, boot into windows, and pull out the plug.
     
  6. Mace

    Mace Ohh, it stings.

    Joined:
    9 Dec 2003
    Posts:
    1,003
    Likes Received:
    0
    That isn't too healthy ;)

    Most of the times, you can turn the comp off, unplug, hit the power button, wait a few minutes, hit it again, and hit it once again another minute or two later :) Any shock after that shouldn't be much more of a tingle (trust me, you don't want to get hit by a strong capacitor, I still have two burn marks from when I was playing with a camera and accidently touched the capacitor)
     
  7. Altron

    Altron Minimodder

    Joined:
    12 Dec 2002
    Posts:
    3,186
    Likes Received:
    61
    Why not? Yesterday I cut off mains to the house when my puter was on, then i turn mains back on and power up the PC no problems at all.
     
  8. sirgeoph

    sirgeoph What's a Dremel?

    Joined:
    19 May 2003
    Posts:
    81
    Likes Received:
    0
    there's a reason windows has had either an exit or a shutdown option since the beginning. windows tends to put stuff on your hard drive, i.e. temp files and such and not shutting down properly leaves that stuff there. there's probably other reasons as well.
     
  9. cpemma

    cpemma Ecky thump

    Joined:
    27 Nov 2001
    Posts:
    12,328
    Likes Received:
    55
    True enough, but one extra incorrect closure (aka BSOD) isn't going to do any extra harm... ;)
     

Share This Page