I'm sorry about the problems with the module. Maybe one or more of the diodes and/or transistors are defective.

If you cannot fix the the problem please follow the repair notes on the FAQ page of our website:

www.doepfer.com > English > FAQ > General > Repair procedure

Best wishes
Dieter Doepfer

> -----Ursprüngliche Nachricht-----
> Von: Doepfer_a100@yahoogroups.com [mailto: Doepfer_a100@yahoogroups.com ]
> Gesendet: Freitag, 5. Juli 2019 07:14
> An: Doepfer_a100@yahoogroups.com
> Betreff: 1 A-143-2 problem
>
> While using one of the EG of this module all of a sudden it did not function
> well anymore. None of the pots has any influence on the envelope. The attack
> stays at max. I already replaced both TL084 and CMOS555 but that didn't solve
> anything. The other three still work fine. Any suggestions are more than
> welcome.
>
> Best regards,
> Karel