[sdiy] Roland Promars second oscillator schematics?

[Steve Lenham]

> >Does anyone have the schematics for the Roland Promars (relatively
>>rare monophonic version of the Jupiter-4)?
>>
>>I'm interested in the unique second oscillator board (not shared by the 
>>JP4)
>
> Today I unfortunately don't have a JP-4 here to check, and I doubt I will 
> have one tomorrow.  :-(

Maybe not today, maybe not tomorrow - but soon? ;-)

But you wouldn't find this board in a JP-4 anyway - they are resolutely one 
VCO per voice.

> But could that be the "VCO-9A" board (PCB 052-439A) ?  I've got a neat 
> drawing of that here.  ;-)
>

Yes, that's the one - it is mentioned in the JP-4 service manual but no 
further details are given; the text says that it is really just the VCO 
section of a JP-4 voice card, but I would like to see how the CV and 
(de)tuning pots are wired up.

Thanks,

Steve L.