Just a thought.... Check the operation of IC31 (s/h in at pin 3, demux at
pin 2).
You won¹t be able to fix the problem in a blind panic. Just stop, think and
take a deep breath.
Good luck,
Andy
On 11/03/2011 03:26, "Bernie GREENBERG" <ptsaudio@sbcglobal.net> wrote:
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> I am working on a Korg Polysix with the usual tuning problems. I replaced the
> photo coupler with a VACtrol and resistor mod and still unable to tune
> keyboard. The high tuning control, VR2, seems to do nothing. I have tried
> different resistor values with the VACtrol mod and still have tuning problems
> with the high end of the scale. TIME CRITICAL repair and going out of my
> mind!(BTW- no battery corrosion at all!)KLM367 aligned perfectly, KLM 366
> board
> is new production. PLEASE HELP!!! Thanks in advance for your time.
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