Discussion about the Korg PolySix synthesizer

If the LEDs turn on and off when you press the corresponding switch, then the 
8049 key assigner MCU is reading the switches correctly.   I think all of the logic
to implement those features is in the code of that MCU.  Maybe try replacing that chip?
Maybe you can borrow a good on just to try.

    Bob
 
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On Thu, 4/28/16, chrismitchrocks@yahoo.com [PolySix] <PolySix@yahoogroups.com> wrote:

 Subject: [PolySix] Apreggio, Chord Mode, Unison, Poly button do not work.  Help?
 To: PolySix@yahoogroups.com
 Date: Thursday, April 28, 2016, 7:05 PM
 

       
       
       I have tested the buttons with a multimeter and
 they all successfully connect when held down.  The buttons
 each light up correctly; the unison patches display the
 unison LED.  The arpeggio rate LED responds
 correctly.
 I also
 checked the ribbon cable going from the arpeggio knob board
 to the buttons board and each of these wires were connected
 properly.
 Any ideas
 what to check?  I thought about replace the buttons, but
 since they connect fine it seems like they should
 work.