Doepfer

Hello Floris, basically I think it's possible that you've fried more
than one chip. However, the CEM3320 is not easily to come by. 

Synthtech (home of MOTM) stocks them: https://www.synthtech.com/testcart/

Vintage Planet is currently out of stock but check with Senso. He'll
stock them again sooner or later:
http://www.vintageplanet.nl/

Doepfer sells them as spare parts:
http://www.doepfer.de/preise.htm#Ersatzteile%20/%20Spare%20parts

Hope that helps, Ingo

> again i've broken my a121 vcf 2 multimode filter by connecting the
+-12v the wrong way. 
> last time i had it repaired and they putted a new cem 3320 inside.
> so can i repair this myself by just putting a new cem 3320?  or is
it more than that?
> are these chips easy to find?
> 
> this time also my a119 ext input was connected wrong, any idea how
this can be repaired?
> 
> thanks for the help! floris
>