Connect with us

Do Ceramic Disc Caps Leak?

Discussion in 'Electronic Repair' started by [email protected], Dec 27, 2008.

Scroll to continue with content
  1. Guest

    I opened up a used Enermax EG351P-V computer power supply to inspect
    before installing in a system. All the electrolytics looked good and
    I believe the power supply is working fine (I've included no-load test
    results). But near one of the heatsinks I found this:

    http://img178.imageshack.us/my.php?image=powerkd2.jpg

    A blue epoxy dipped disc capacitor was leaning up against one of two
    standing power resistors that it is installed between. I pried it off
    of the smaller resistor and you can kind of see where it was attached
    (the clean spot on the smaller resistor). I chipped off some of the
    brown gunk and it is very similar looking to other hot melt glue used
    in the PS to glue down the larger electrolytics, but also appeared a
    bit different, dirtier perhaps (maybe burnt?). You can also see what
    could be a smear of this same brown glue on the larger resistor.

    So, is it possible that the disc capacitor was purposefully hot glued
    to a power resistor? I believe the reason would be to keep it away
    from the larger power resistor which might damage it more. Do disc
    caps leak like electrolytics?

    No lead readings:
    red: 5.11
    yellow: 12.3
    white: -4.7
    orange: 3.43
    blue: -10.66
    purple, grey: 5.11
     
  2. There's nothing (I know of) in ceramic caps to leak.

    It wouldn't be surprising if the cap was hot-glued in place.
     
  3. Arfa Daily

    Arfa Daily Guest

    Depends what you mean by "leak".

    No, I've never seen one that physically leaks any internal material or
    chemical.

    Yes, I've seen many that leak electrically, as in anywhere from a coupla
    hundred k to short circuit.

    Arfa
     
  4. Jeroni Paul

    Jeroni Paul Guest

    I'm pretty sure this is glue to keep the resistors in place. It is
    darker because the resistors run quite hot.
     
  5. Spamm Trappe

    Spamm Trappe Guest

    Just what are you nattering on about?

    Oh, I see. A google gr00per.......
     
  6. Guest

    That's just glue, and some companies use a yellow kind that turns
    brown and powdery in just a few months of use.
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-