[time-nuts] pts 160 power problem

J. Forster jfor at quik.com
Fri Feb 25 17:15:15 UTC 2011


Look for a shorted Tantalum decoupling capacitor on the DC power line(s).

-John

=============


> hi
>
> i recently bought a pts160.  when first turned on, the 5v was pulled quite
> low: < 3v.  after an hour or so, the condition cured, the 5v = 5.1v and
> the
> output matched the decades.
> then, it died again.  so i know there is a unit worth saving.
>
> i tried another more robust 5v supply, but that goes to 4.5v and ng
> output.
>
> i removed each of the plug-in decades, one at a time, looking for the
> guilty
> one.  no joy.  i also removed the left rear module (uses 5v).  the other
> two
> modules only use 12v. which is fine.
>
> has anyone been here before?  could it be a problem in the backplane (a
> work
> of art, btw)?
>
> many thanks...
>
> dave
> --
> Dave Mallery, K5EN                 (ubuntu linux 10.10)
> HC31 Box 99E;                   Williamsburg,  NM  87942
>
> no gates...
>   no windows!
>     free at last!
>       linux counter #64628 (since 1997)
>
> "People aren't as dumb as Microsoft needs them to be."
> --PJ, May 2007
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