Hello Karl,

I'm sorry about the problems with the module. From the distance it's difficult ti find out what's wrong. If the CV inputs have no effect and even the CV out does not work I suppose that the quad operational amplifier IC2 (LM324 or TL084 below the OFFSET trimming potentiometer) is defective and has to be replaced. It's a standard electronic part and should available locally without problems. If you cannot fix the please follow the repair notes on the FAQ page of our website:

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

Or send the module to our address in Germany provided that you stay within the EU.

Best wishes
Dieter Doepfer

> -----Ursprüngliche Nachricht-----
> Von: Doepfer_a100@yahoogroups.com [mailto: Doepfer_a100@yahoogroups.com ]
> Gesendet: Dienstag, 2. Juli 2019 23:18
> An: Doepfer_a100@yahoogroups.com
> Betreff: 1 A-188-1 (1024) problem
>
> I fear my A-188-1 is faulty. What's embarrassing it that I think it's been
> busted the entire time I've had it (I bought it brand-new years ago).
>
> Symptoms:
> the CV inputs do nothing.
> I can not hear the delay effect
> I can hear a "phasing movement" sound when I turn the Delay Clock.
> The feedback works
> The CV OUT does not output CV.
> There is no "clock noise" when I use it.
>
> ...so I can't figure out if the VCO is dead of the BBD chip is dead...or
> both.
>
> Any ideas
> Where can I get replacement parts
>
> Thank you!
> KARL.