[sdiy] Intermittent ground hum (?) on spirit mixer (psu?)

[harrybissell]

I'd look for a broken solder connection, or loose wire. Take a non-conductor
(or a conductor if you crave excitement and/or pain :^) like a pen and push the
circuit board gently at all components etc. When you hit near the area of the
break, it will go @pesh!t...

H^) harry

Julian wrote:

> Hi there,
>
> My mixer is irritating sometimes.  Real occasionally, if things have been moved about around its external psu, it makes this god
> awful buzzing noise, like a ground hum or something.  Moving the psu again seems to solve this, but its one of those real
> intermittent faults that im not sure how to investigate.
>
> Im assuming that probably something is amiss in the wire between the plug and the transformer, or transformer and mixer.
>
> I havent even taken a look inside yet, but i thought id just ask for suggestions here first, in case anyone had any clear ideas?
>
> The mixer is a spirit folio f1, with a uk psu (if that makes any difference).
>
> Comments welcome?
>
> Cheers, Julian