I would have to see a picture...
What you describe should have a stereo TRS jack if that many wires are connected to it. They may have broken into the FX section to use an outboard FX loop. This can affect the overall noise in the synth too. I found out the hard way that running unshielded wires with analog signals around inside a Poly-800 is a great way to reduce the signal to noise ratio. Not good.
Fran
--- In korgpolyex@yahoogroups.com, "fugasiyokonda" <fugasiyokonda@...> wrote:
>
>
> Hi guys
>
> just got hold of a mk2 poly 800 from ebay and it seems to have an
> extra 1/4 inch jack on the back half way down the synth.The echo and fx
> section is also not working....bummer......looking inside it looks like
> someones added the jack and its wired into the fx section ? the plot
> thickens.Any ideas whats going on here ?
>
> It seems theres a yellow wire going from the jack to one part of the fx
> board , a yellow from the jack to another part opf the fx board and then
> 3 blue wires from the voice board....?
>
> Should i upload some images or is this a known mod ?
>