Locating short circuits (was Memorex 102 20MB Hard disk)
dkelvey at hotmail.com
Wed Apr 14 12:52:13 CDT 2010
> From: ragooman at comcast.net
> Mike Loewen wrote:
> > On Wed, 14 Apr 2010, dwight elvey wrote:
> >> I have a none destructive method of locating such shorts. It requires
> >> a bench power supply and a good DVM.
> > Has anyone here used an ESR meter to locate a short across the
> > power rails? If so, what's the technique?
> I guess you mean this
> But you really want a Milli-Ohm Meter to find shorts with more precision
> when it comes to connections with several components on there, about 0.1
> milli-ohm resolution. That lets you pinpoint the short directly to the
> sport on the pcb, even between the next pin on a chip. I just found a
> place online the other week that has one for $150 from Ruby Electronics,
> other costs 3 times as much, but I still have to wait to get one
> myself--other bills still have priority :)
It is obvious that you have never tried my method if you truly
believe that a Milli-Ohm meter is easier to find shorts than the
method I describe. I've spent many years using various techniques
to find shorts on all kinds of boards and systems.
I've use TDRs, Milli-Ohm meters, thermal paper and even expensive
HP current probes.
Of these, the method I describes was the simplest and cheapest method.
It requires no special equipment and is far superior to a milli-ohm meter.
The other methods I'd mentioned are superior to the milli-ohm meter
Hotmail has tools for the New Busy. Search, chat and e-mail from your inbox.
More information about the cctech