[sdiy] Casio CZ-3000 with mains to chassis fault

cheater cheater cheater00social at gmail.com
Tue Aug 31 06:59:39 CEST 2021


Hmm, I mean, I can see that, but this hurt way more than the mains
shock I got a couple years back. Makes sense given that static is
higher voltage... just surprising... I guess the thing is a piece of
metal surrounded by plastic paneling, seems like a great way to build
a Leyden jar...

On Tue, Aug 31, 2021 at 12:54 AM Tom Wiltshire <tom at electricdruid.net> wrote:
>
> Static shocks get worse with low humidity, so weather is more of an issue than wiring!
>
> It’s August. I’m guessing you’re in the northern hemisphere so you’re somewhere that’s having summer now and it’s pretty hot and dry.
>
> > On 30 Aug 2021, at 23:31, cheater cheater via Synth-diy <synth-diy at synth-diy.org> wrote:
> >
> > Yeah, I just unwrapped it. Could well be. But the shock was pretty
> > damn huge. Can this effect be compounded by mains capacitors being
> > connected to chassis through ground? Should I bridge them with 1MR
> > shunts?
> >
> > On Mon, Aug 30, 2021 at 6:43 PM Richie Burnett
> > <rburnett at richieburnett.co.uk> wrote:
> >>
> >> Sounds more like a static electricity shock to me, if it wasn't connected to anything at the time and you had just been removing plastic packaging etc.
> >>
> >> -Richie,
> >>
> >> Sent from my Xperia SP on O2
> >>
> >> ---- cheater cheater via Synth-diy wrote ----
> >>
> >>> Hi all,
> >>> I have just unwrapped a new-to-me Casio CZ-3000, which seems to be in
> >>> excellent condition cosmetically. As I was unwrapping it, the metal
> >>> chassis gave me a pretty strong shock. I assume that was the mains
> >>> capacitor unloading into the chassis and ground. The keyboard wasn't
> >>> plugged in and hasn't been plugged in for weeks. I was wondering if
> >>> anyone knew of any common faults that this keyboard might have that
> >>> would cause this.
> >>>
> >>> Best regards
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