[time-nuts] Power problems on HP5372A

[paul swed]

Suggest that you disconnect the switch and run 50-100 ma DC through the
contacts push on and off a number of times. This should clean them. Low
current such as you suggest may not effectively keep them clean over the
years. Did wonders on a SRS FS700 I have.
Regards
Paul
WB8TSL

On Tue, Dec 28, 2010 at 3:17 PM, Magnus Danielson <
magnus at rubidium.dyndns.org> wrote:

> Fellow time-nuts,
>
> The last couple of days I have been experiencing problems with my HP5372A
> as it will not power up. I have noticed that my power switch is cranky but
> haven't thought anything about it, just one of those annoying personalities.
>
> As everything else seems fine in the unit, I was suspecting the power
> switch. It's just that it actually doesn't switch much power. It's a
> low-power DC power enable switch. So just shorting it on the right side
> enables the switching supplies and it "opens up".
>
> So if one encounters similar behaviour on a HP5371A, HP5372A or HP5373A, do
> have a look at the power switch signals. They are easy to access on the back
> side of the front panel (fairly obvious three fairly neatly soldered in).
>
> I'm not sure I can find a suitable replacement. I will see if it is a
> mechanical problem that can be overcome with some patience.
>
> Anyway, the counter itself is intact.
>
> Cheers,
> Magnus
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>