Repairing a Doepfer A-140 ADSR

I stupidly plugged in the module backwards.

Shit happens .
Remember, Red Stripe Down. !!!!

 If this happens to you , don't panic.
There are only a few sensitive components.
Start by swapping out the ICs.
Thankfully they are socketed.

Just 2 of them:

This is a TL084.
Its a op-amp

This is a CD4001 CMOS chip
They are sensitive to static electricity, and is the most likely culpruit.
It's a quad 2-in NOR gate

I swapped it with one of these and the module worked again

You can :-)

Links
+ CMOS
+ Integrated circuits - packaging 
+ Opamps - basic circuits
+ Synthesizer Logic Modules - The 7 gates