Re: Asteroids/Asteroids Deluxe

There are some devices out there to help you find the short. One is called
the "Short Squeak" and it is a simple probe that changes in pitch the lower
the resistance. You can use it to follow the short to it's source. These
show up on eBay every now and then. There are other things that do this-but
I can't think of their names.

Secondly if you have an ESR meter you might be able to use it to find your
short. You would need a very good pair of test leads to reduce the contact
resistance and use it's 0.01 minimum range to perhaps help find the short.
I have not tried this out, perhaps if anyone can lend you an ESR meter you
can let us know if it works. I don't have any shorted boards to test this
theory on in the shop.

John :-#)#

At 08:10 AM 23/08/2001, you wrote:

>ok, so here is my very troublesome problem.
>
>I have 2 Asteroids boards and 1 Asteroids Deluxe board and I meter across
>the BIG FAT GND trace and the 5v FAT line (these fat strips are actually
>striped down the board in alternating patterns GND, 5V, GND 5V...etc) to
>check and I find that board #1 is 3 Ohms, Board#2 is 19 Ohms an board#2 is
>90 Ohms. These are essentially shorts. My multimeter (put in continuity
>mode) beeps (continuous tone) to let me know that it is in fact a short.
>
>So.... Given the fact that these are shorts (and all my known working boards
>are not shorted - obviously since that would be close to tying power to
>Ground), I am at a loss. How the heck does one determine what component is
>doing this (outside of an actual solder blob or trace issue). Anything, and
>I mean, pretty much anything can cause this. Capacitors (my first pick),
>faulty chips (these potentially could fail in such a manner as to short
>their GND and VCC lines, can't they), transistors etc...). Making
>measurements on the board is now useless since every component that ties to
>both GND and VCC will register a short. For the life of my, I don't know
>how to figure out which component is responsible without yanking every damn
>chip or every damn cap that goes across 5V and GND.
>
>Any help, and I mean any help, would be appreciated.
>
>Cheers
>Andy
>
>
>
>Andrew Evrovski
>HPC Development Director
>Cyberplex
>t: 902.429.4721 ext.109
>f: 902.423.0899
>www.cyberplex.com
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Received on Thu Aug 23 14:37:39 2001