Vintage Synth Repair

Hi,

Thank you for replying.
I swapped the SSM2044 chip and the other chip on a IC socket but that did not fix the problem.

When I turn the EG Intensity knob full up I can hear sound from the defective voice at the same level as the other voices. I tried to find a trimpot for the EG Intensity but I coudn't find one. I guess there is a defective part in the circuit of that defective voice. I replaced the electrolytic capacitors but that did not help.

Any other ideas?

Thank you!

 Nicolas

 

--- In vintagesynthrepair@yahoogroups.com, John Henson <synthnerd@...> wrote:
>
> Hi Nicolas,
> I have found the SSM2044 filter chips to be problematic. I put tiny 
> numbered labels on the chips and then swap them around to confirm the 
> diagnosis. With the voice LED's it is easy to tell which voice is 
> triggered. The envelope chips can sometimes be iffy as well but 
> switching the VCA to gate mode will give you output if this is the case.
> John.
>