1. Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
    Dismiss Notice

Capacitor replacement tutorial

Discussion in 'Electronics Videos' started by ElectroMaster, Dec 16, 2011.

  1. ElectroMaster

    ElectroMaster Administrator

    Joined:
    Jul 5, 2002
    Messages:
    2,051
    Likes:
    127
    Location:
    Broadbeach, AU
    Capacitor replacement tutorial

    Description

    You may have heard about infamous capacitor plague problem, where crappily manufactured capacitors died prematurely on people's motherboards. Even if the capacitor was properly made, they still only have a finite lifespan, typically 10,000-100,000 hours. After this, you need to replace the caps or replace the whole board. This video shows you what to do! Some people also like to buy old audio amplifiers and are able to repair them simply by replacing the old, leaky capacitors with new ones. The same principles apply.



    By Afrotechmods.
     
    Last edited: Sep 10, 2013
  2. duffy

    duffy New Member

    Joined:
    Dec 22, 2008
    Messages:
    2,618
    Likes:
    73
    Location:
    nortern 'sconsin
    Great tutorial! It had explosions, cats, and a Ninja!

    But it could have used a passing mention on the issue of ESR. I think some of this capacitor plague we are seeing these days has to do with using general-purpose electrolytics in place of low-ESR caps. More and more power supplies use ever higher frequency switching regulators. The old aluminum electrolytics that were just fine at 60 Hz will get hot and cook themselves to death at 100,000 Hz. If it's a switching regulator, look for a replacement that says "low impedance", "low ESR" or "high ripple" in the spec sheet, otherwise you may be replacing it again soon.
     
  3. harold777

    harold777 New Member

    Joined:
    May 24, 2012
    Messages:
    50
    Likes:
    1
    Location:
    london, england
    Funny, I thought capacitors were more-reliable these days.

    Switches, Relays and Connectors could do with some improvement, though.
     
  4. dave

    Dave New Member

    Joined:
    Jan 12, 1997
    Messages:
    -
    Likes:
    0


     
  5. colin55

    colin55 Well-Known Member

    Joined:
    Feb 14, 2009
    Messages:
    3,534
    Likes:
    82
    Location:
    Melbourne Australia

    The only thing he forgot was ripple.
    The replacement capacitor should be about the same size as the original. If it is much smaller it will heat up and fail prematurely.
     

Share This Page