Tek 7904 scope
tpeters at mixcom.com
Wed Feb 28 22:07:54 CST 2007
What I really need is someone that's done troubleshooting on a 7904 power
supply before, that can offer a few suggestions. Like, if I do locate a bad
cap, what should I replace it with? The DigiKey catalog is vast.
At 11:44 PM 2/28/2007 +0000, you wrote:
> > At 10:12 AM 2/28/2007 -0500, you wrote:
> > > > >See if it "comes back" after
> > > > >having been off for a while. Perhaps this is a known condition
> > > > >of the unit.
> > > >
> > > > I've tried it once a day since Sunday. No go.
> > >
> > >Thats probably good news - nothing harder to fix than a problem
> > >which comes and goes ... If it firmly busted, it shouldn't be too
> > >hard to find.
> > I sure hope that's true.
>It is. You can't possibly find a fault that's not there. And an
>intermittant fault is 'not there' when the device works correctly.
>One of the most annying faults to trace (and we've all had them) is the
>fault that disappears when you connect a 'scope probe _anywhere_ on the
>device under test. Most likeht it's a bad conneciton somewhere, but
>finding it will drive you (in)sane...
273. [Philosophy] "What experience and history teach is this--that people and
government never have learned anything from history, or acted on
principles deduced from it." --Hegel
--... ...-- -.. . -. ----. --.- --.- -...
tpeters at nospam.mixcom.com (remove "nospam") N9QQB (amateur radio)
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