[time-nuts] Re: HP53131 Power Supply shortened

[Glenn Little WB4UIV]

If I were a betting man, I would say that the spillage is from a 
decomposed bumper that was placed to prevent the board from flexing and 
possibly shorting out.

This is somewhat a common failure for bumpers and rubber feet.

Glenn

On 12/8/2021 5:53 PM, Marek Doršic 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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-- 
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Glenn Little                ARRL Technical Specialist   QCWA  LM 28417
Amateur Callsign:  WB4UIV            wb4uiv at arrl.net    AMSAT LM 2178
QTH:  Goose Creek, SC USA (EM92xx)  USSVI, FRA, NRA-LM    ARRL TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"