[sdiy] Korg Poly-61 schematics

[Peter Cooke]

Hi list,

Does anyone have the schematics for the Korg Poly-61?

Better still, could anyone help me with mine that isn't working?

It's no longer working in 'poly' mode.  Some notes come out OK, some don't, 
both in sound and pitch.  The incorrect notes aren't tied to any particular 
oscillator as the unit cycles around the oscillators with each key press and 
the duff notes seem to be coming out at random.  The unit also sometimes 
plays a constant note when it's switched on even though no keys are pressed.

The arprggiator is similarly dodgy in 'poly' mode.  Even when triggered from 
a single note, the resulting arpeggio contains random notes.

In 'chord memory' mode the unit seems to work fine, both from the keyboard 
and from the arpeggiator.

Sounds like a data transfer glitch between the CPU and the DCOs?

Help!

Pete

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