Vintage Synth Repair

--- In vintagesynthrepair@yahoogroups.com, SG <ankh@t...> wrote:
> Hi Mike,
> Thanks for your answer :) When I press osc2 in mixer the 
>incremental 
> control works well but, after I did the tuning procedure, it 
>regulates 
> only osc2 fine tuning....... I've lost the osc 2 volume control

Hmm. If you press the osc2 in the mixer, the wheel should control the 
volume of osc2 and not the incremental tuning. The incremental 
*should* only control the osc2 tuning. It sounds like the switch in 
the mixer section isn't working. Do the other switches in that 
section work? If you go from another parameter (for example Filter 
Attack) to the osc2 mixer, does the incremental parameter still come 
up? There might be a short in the membrane. Really you can tune 
everything by making sure osc1 is in tune (using the tuning pot on 
the back) and then adjust the incremental tuning until 1 and 2 aren't 
beating.

> I searched in your website for the pushbutton switches but......... 
I 
> didn't find it; could you post the link?


It's not on there yet... the project's just about done, but my 
computer's down! Otherwise, I could tell you which ribbon/pin 
combination activates the osc2 mixer parameter. I should have it all 
up there in 2 weeks.

Good Luck!

-Mike Walters
www.mysterycircuits.com