Re: [SI-LIST] : Plane short

About this list Date view Thread view Subject view Author view

From: Scott McMorrow (scott@vasthorizons.com)
Date: Sat Apr 28 2001 - 22:25:05 PDT


Subas,

Here's one approach that I have used in the past.

Take a current limited programmable power supply and
attach it to the power planes.

Take a can of freeze spray and spray down the entire
backside of the board until it is covered with frost.

Slowly turn on the power supply and increase the current.

The area of the short will heat up most quickly and melt
the frost. Once you focus in on the general area, you should
be able to repeat the proceedure until there is only a
small area for you to look. Then you can go to the
gerbers and find the most likely short site if it is inside the
board, or remove the part that is hiding the solder short.

regards,

scott

--
Scott McMorrow
Principal Engineer
SiQual, Signal Quality Engineering
18735 SW Boones Ferry Road
Tualatin, OR  97062-3090
(503) 885-1231
http://www.siqual.com

"Bastola, Subas" wrote:

> What is the best method to find the location of a short between the power > and gnd plane in a fully assembled board? Can TDR help? > > Subas Bastola > Intel > > **** To unsubscribe from si-list or si-list-digest: send e-mail to > majordomo@silab.eng.sun.com. In the BODY of message put: UNSUBSCRIBE > si-list or UNSUBSCRIBE si-list-digest, for more help, put HELP. > si-list archives are accessible at http://www.qsl.net/wb6tpu > ****

**** To unsubscribe from si-list or si-list-digest: send e-mail to majordomo@silab.eng.sun.com. In the BODY of message put: UNSUBSCRIBE si-list or UNSUBSCRIBE si-list-digest, for more help, put HELP. si-list archives are accessible at http://www.qsl.net/wb6tpu ****


About this list Date view Thread view Subject view Author view

This archive was generated by hypermail 2b29 : Thu Jun 21 2001 - 10:11:45 PDT