Hey Michael,
Thanks so much for the response! I plugged in my 88 key MIDI controller, and every key (including accidentals) incremented the value by 1.
--- In korgpolyex@yahoogroups.com, Michael Hawkins wrote:
>
> Since the switch checked out OK, you would have to look further into the electronics that runs the scanning of the switches.
>
> What you should do is start from the bottom note on the keyboard and work your way up through all of the keys, normals and accidentals. Take note of which keys do NOT cause the display to count up (the right hand displays should increment by 1 each time to play a note).
>
> If some of the notes on the keyboard do NOT cause the display to increment then we can check the schematic and see if we can work out which chips or DTC's or diodes or other things might be broken.
>
> Mike
>
>
>
>
> ________________________________
> From: cc0919ship
> To: korgpolyex@yahoogroups.com
> Sent: Wednesday, January 23, 2013 8:36 PM
> Subject: [korgpolyex] Re: Frozen Poly 800
>
>
> Â
> Anyone else have any ideas? I really don't want to trash this synth if it is something simple, was really looking forward to using it :(
>
> --- In korgpolyex@yahoogroups.com, "cc0919ship" wrote:
> >
> > Hello all,
> >
> > I'm wondering if you can help me out. I recently acquired a broken Poly 800 (original, not MKII.) It powers up, but immediately after powering up, the screen reads "1.8 50 01." Buttons on the front panel do nothing, and keys do not make noise. If I turn up the volume the whole way, I can hear the filter sweeping up and down. Here's where it gets interesting - I plugged in a MIDI keyboard, and when I play notes with the MIDI keyboard, the 800 makes static noises, and the last value on the screen increments by one.
> >
> > I opened it up, checked the tactile switches (all seem fine.) I also replaced the internal CMOS battery. I was under the impression that MKI 800s didn't have this, so the main board may have been replaced by someone along the line.
> >
> > Anyway, has anyone had a problem like this and could help me out? It is potentially one of the ICs, but I have no idea how to test them.
> >
> > Thanks,
> >
> > Christian
> >
>