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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--
-----------------------------------------------------------------------
Glenn Little ARRL Technical Specialist QCWA LM 28417
Amateur Callsign: WB4UIV [email protected] 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"
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