[sdiy] Bizarre Xpander Tuning Problem

[Maarten Halmans]

You might have already checked this but maybe one of the selection 
switches of the tri, saw or noise is still on during auto tune? If there 
is a problem with one these control signals it affects all VCO's.

Cheers,
Maarten


Op 10-8-2021 om 20:37 schreef gm via Synth-diy:
> I have here an Xpander that will either pass or fail Tune, but will 
> always have the VCO 1s in perfect tune & scale, while all six VCO 2s 
> will be out of tune & out of scale.
>
> Did the usual replacement of all DAC components, and the ICs involved 
> in the tuning routine;  no help.
>
> Am struggling to find what all six VCO 2s have in common that might be 
> causing this;  any pointers would be greatly appreciated.
>
> ~GMM
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