Re: BU409

On Tue, 28 Nov 2000, Matt Rossiter wrote:

> By the way, it sure would be nice to have a little get together (at least the
> southern californians) and discuss techniques on fixing cinematronics cpu
> boards. I have the Kurz Kasch exersizor and it even works fine with the HP sig.
> analyzer - I still have problems finding the bad chips though. Anyone up for
> that? anyone anyone? ...poke poke... Zonn? Paul O.? ...poke poke.
>

        You use it to find a bad sig., and then backtrack until you find a
good sig. The point(s) at which the sig. goes bad is/are your bad
chip(s). Where to find the bad sig is kind of random, but for a broken
board, you should be able to find a bad sig. without much effort -- start
at the output(s) of the ALUs or memory or something like that.

        If you are finding that you have no good sigs or no bad sigs, I'll
need to think about that case some more......No bad sigs implies no
problem, while no good sigs implies a setup problem or something like
that.

Joe

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Received on Tue Nov 28 18:32:28 2000