Jorge,

     We simply use a standard "buzz light/continuity tester" and 4 1/2 digit DVM
(the more digits the better).  Connect
the buzz light and DVM in parallel with each other and set the DVM to
microvolts.  Connect one end of the parallel connection
to one of the shorted nodes.  Touch the other side of the parallel connection to
other shorted node in various locations.  The
lower the reading on the DVM the closer you are to the short.   What you are
measuring is the small voltage drop across the "short"
plus the traces.  Once you get in the area of the short you can move both ends
of the parallel connections to the area and home in
on the exact point of where the short is.  One common mistake is that people
hook the DVM and buzz light in series.  It must be
hooked up in parallel and the readings should be very small voltages if
connected correctly.  If you don't have a buzz light you
can use a current limited supply.  Good Luck!

Best Regards,

Mike





Jorge Santana <[log in to unmask]> on 04/10/2001 05:34:46 PM

Please respond to [log in to unmask]

To:   [log in to unmask]
cc:    (bcc: Michael Forrester/NEWYORK/LECROY)

Subject:  [TN] Caps shorting on bottom side ( another question )



 Techies ;

   Is there a " LOW COST " solution to find a short in two common nodes like
VCC to GND ?
   Is there somebody using a current tracer or something similar ?
   This information will be very helpful to my troubleshooting task.

 Thanks

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