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From: firstname.lastname@example.org (Andrew VK3BFA)
Subject: Re: Electronic News story: Leaky capacitors shorting circuits; problem spreads
Date: 31 Oct 2002 15:19:19 -0800
NNTP-Posting-Date: 31 Oct 2002 23:19:19 GMT
Winfield Hill wrote in message news:...
> Andrew email@example.com wrote...
> > "News2020" wrote...
> >> This is a ng for finding the truth. What is the reason for this ?
> > Sorry, I seem to have lost the plot here - what do you mean by
> > "finding the truth'.......
> For me the lesson is to be very careful when selecting low-esr
> electrolytics for use in high-current switching supplies. The
> mobo manufacturers used capacitors that pushed the envelope too
> far and were smaller than was wise, 8mm dia instead of the more
> common 10mm size.
> >> "Winfield Hill" wrote ...
> >>> Story in Electronic News, 10/28/2002:
> >>> Leaky capacitors shorting circuits; problem spreads
>>> For full story, http://www.e-insite.net/electronicnews/index.asp?
> >>> layout=article&articleid=CA255062&pubdate=10/28/2002
> - Win
Win, I cant argue with you on design criteria (it would be blatantly
presumtous of me to even attempt to do so) but I have found the rotten
little buggers failing all over the place irrespective of what and
where they are used - they are in the "good idea at the time"
They first started surfacing (no pun intented) about 8 years ago in
video camcorders - which makes sense considering the need for
miniatureisation(sp) and was probably exacerbated by our climatic
conditions (ie hot summers) - as the boards are invariably multilayer
thru hole plated the corrosive effects usually totalled the board
rendering it uneconomical to repair.
I have also found them in 20" HP monitors (rebadged Sony) , JVC VCR
(head drum control) and Panasonic VCR (chroma processing sub-sub-
boards. These 3 are fixable, albeit with a fair degree of stuffing
I suspect they will be remembered with the same fondness we now
reserve for using Carbon Tetrachloride as a cleaning agent.
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