Re: Messed up my Black Widow

On Sun, 1 Jul 2012, Joel Rosenzweig wrote:

> You could have an integrated circuit that has failed, causing the short.
> I've had failures with the TL082's (for example) that took the whole board
> down due to an internal short. These are very tricky to find. I don't know
> how to effectively troubleshoot that without removing parts one at a time
> (or at least lifting the Vcc leg). 

I wonder if it would be possible to do a nodal analysis ?

For those who didn't take (or forgot) circuits 101, this involes simply
measuring the voltages at various points in the circuit (called nodes, hence
the name). I remember years ago fixing a WG color vector monitor, because
Atari printed nodal voltages on the schematics (probably exactly for this
purpose). With the help of people on this list I was able to determine where
my boards voltages differed from the schematic, and what was the likely
failure based on this.

So the first quesion would be, do the Black Widow (Gravitar) schematics have
nodal voltages on them anywhere that would be usefull ?

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Chris Candreva -- chris@westnet.com -- (914) 948-3162
WestNet Internet Services of Westchester
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Received on Sun Jul 1 23:24:35 2012