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ups apc bk300c

Discussion in 'Electronic Repair' started by [email protected], Aug 22, 2005.

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  1. Guest

    I'd like to disable the sound on my APC BK300C battery backup. I found
    the little device on the printed circuit board which is causing the
    really annoying and nasty sound. It's a black circular object. Is it
    possible to fill in the hole thereby muffling the sound? Or can I
    remove the object and re-solder something in it's place?

    Here's the little noise maker itself:

    Here's the top of the printed circuit board ... the circle is where
    it's located.
  2. Guest

    Why not just cover the hole with a piece of masking tape?? If that
    doesn't muffle the sound enough, cut one of the pwb leads to the
    sounder itself.

    H. R. (Bob) Hofmann
  3. Guest

    Yeah I could try the masking tape thing. But I was really hoping to
    totally eliminate the sound. How can I cut one of the leads when it's
    flush on the circuit board?

  4. Desolder them.

  5. Guest

    Using a sharp Exacto type knife, cut one of the traces on the pwb that
    go to the sounder. Make two cuts 1/16 inch apart on whichever trace
    goes only to the sounder, and then use the edge of the blade to lift
    the copper trace between the two cuts. But I would really try the
    masking tape first as it should do a pretty good job and isherder to
    screw up than cutting a wrong trace.

    H. R.(Bob) Hofmann
  6. Bob in Phx

    Bob in Phx Guest

    all joking aside, I normally crush the thing with vice grips. Solves the
    issue right quick. Of course, please be sure to unplug the device and the

    bob in phx..

    p.s. this is a permanent fix, where as masking tape is temp!!!!!
  7. jakdedert

    jakdedert Guest

    Grab the thing with a big pair of pliers and crush it. Snip off any
    pieces that are left with a pair of dikes....

  8. jakdedert

    jakdedert Guest

    Great minds....

    I hadn't read the above before I posted the exact fix.

  9. Guest

    Sounds like a plan ... I'll let you know how it goes ... thanks for the
    ideas! Since I've not had much experience with circuit boards I wasn't
    sure what to do.

  10. Guest

    All worked fine guys thanks for your help! I now have a noiseless
    battery backup!

    I just would have assumed removing that sounder would have somehow
    caused the device not to work.
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