Discussion about the Korg PolySix synthesizer

OK, so the keys that do not work are F#1, G1, D2, D#2, A#2, B2, F#3, G3,
D4, D#4, A#4, B4, F#5, and G5, correct?
When starting the arpeggiator (besides playing wrong notes) does it
light the small voice-LEDs on KLM-366?
When connecting a footswitch to the CHORD MEM footswitch jack, does the
CHORD MEM button LED work as expected (can be switched on and off by
footswitch)? Note: if you do not have a footswitch you can you a normal
phone cable and short the tip to the sleeve on the far end connector
with a paperclip or similar for a test.
And the HOLD button works?


 From the noworking keys I would say the lines P16 and P17 are not
working correctly. But the buttons and the VCO control voltage should
work OK...

Try: disconnect CN12 from KLM-366 (this goes to KLM-371). Are the notes
in tune?

Johannes



On 18.11.2013 19:15, Frank Carvalho wrote:
>
>
> Poly/Chord/Uni do not seem to have any effect, and the LEDs don't come on.
> Hold is on when the synth is turned on, but can be turned off and on.
> Hold now lights up.
> If the keys are numbered repeatedly with 1 to 8, beginning with the
> lowest key, then it is every number 6 and 7 that is off.
> The arpeggiator sends repeated trig signals, but as the same note sounds
> every time, I cannot hear anything but the repetition. Actually the
> sound is much like a detuned unison mode.
>
> And, yes, I have an ancient Philips oscilloscope, if necessary.
>
> I certainly hope I can fix it. I love this synth.
>
> Oh, before anyone asks, I did the battery mod long ago, before any leaks
> occurred.
>
> Thanks
>
> /Frank
>
> On 11/18/2013 09:09 AM, Johannes Hausensteiner wrote:
>>
>> The issue is related to the KLM-366 Key Assigner CPU circuitry. Probably
>> two of the I/O lines are dead (remember, it is an 8bit CPU).
>> Which keys do work and which don't?
>> Do the key assigner buttons (POLY/UNI/CHORD/HOLD/ARP) work?
>> Does the arpeggiator don anything?
>>
>> Do you have access to an oscilloscope?
>>
>> This surely can be fixed!
>>
>> Johannes
>>
>
>
>