Hi
Appearently this is a frequency depending on the pressed keys. I am
quite sure, it will show a kind of tonal pattern each eight keys. Check
also, whether the frequency changes if you press any button or turn a
rotary switch on the frontpanel.
In general this sounds to me like digital and analog ground are mixed up
or that some ground is missing.
Now you may insist, that the schemo does not distinguish digital and
analog ground, but the routing on the KLM-366 appearently makes such a
difference. I'd check additional cables.
In regards of a missing ground, I'd have a look at the ground wire
connections between keyboard frame (not sure whether this is grounded),
housing shield and pcbs.
Florian
Am 02.09.2015 um 16:00 schrieb
cliofreak@yahoo.com [PolySix]:
>
> HI people!
>
>
> I have a Polysix with an annoying noise. It can be seen in this video.
> I was sold the synth and told the battery had been done. I looked
> anyway and some repair had been done in the past as some traces were
> rerouted. I noticed the battery was still there however (possibly a
> replacement that also leaked) and It was leaking. I replace it with
> the CR2032 mod and all patches still work and load/save etc but the
> synth has this noise! Any ideas. All the old trace work seems to be
> fine...continuity checks etc. Help! Please! This synth has the
> potential to sound AWESOME!
>
>