[time-nuts] Re: HP53131 Power Supply shortened

[paul swed]

HP used rubber feet as standoffs and they literally melt over time making
quite a mess. But reasonable to clean up. Can't comment on the sparks.
Regards
Paul
WB8TSL

On Wed, Dec 8, 2021 at 5:54 PM Marek Doršic <marek.dorsic at gmail.com> wrote:

> Hello,
>
>     while taking a measurement my HP53131a counter sparked and became
> quiet. After tear down I found both 3A/240V fuses in the PSU burnt. Before
> pluging a new set of fuses, is there a knowledge of a common problem that
> couses a shortcircuit at the HV side?
>
> The counter has also a spilage at the bottom side of the mainboard, but as
> it is same as in Gerry Sweeney's youtube video (HP 53131A Teardown and
> Spillage Clean-Up <https://www.youtube.com/watch?v=czCLXrUPX0o>) and his
> counter still works I assume it is not related. Is it a good practice to
> get it cleaned?
>
>    .marek
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