ups apc bk300c

Aug 22, 2005 9 Replies

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:



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



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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

snipped-for-privacy@gmail.com wrote:

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?

Thanks

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

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 batteries!!!

bob in phx..

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

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

jak

Great minds....

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

jak

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.

Thanks!

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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