Discussion about the Korg PolySix synthesizer

Hi, got no answer for you, just want so say,
same here, don't know exactly which photo coupler to buy

VTL5C2 (4 pins)
VTL5C3 (4 pins)
VTL5C3/2 (5 pins)

Looking forward to answers,
tuning is not possible with trimpots.

Christian

--- In PolySix@yahoogroups.com, "arpm234" <arpm234@...> wrote:
>
> Hello guys, 
> 
> I've just started to work on tunning the voices and i realised my opto coupler is dead. 
> 
> So i read through the topics and learned that VTL5C3 would be the sollution. However i only got VTL5C2 which has only two pin on the photoresistor side, with a connection in the middle of the resistor which is connected to R93 which is said requires some changes. 
> 
> So what is that middle pin required for ? How can a 2 pin photocoupler be used if possible at all ?
> 
> Any thoughts? 
> 
> Thanks
> Razvan
>