> Although I replaced this module I still am interested in fixing it.
>
> The top output have a quiet oscillator sound, probably the
> driver. There is no additional digital noise. The bottom works as
> it should.
>
> I have tried replacing the schmitt trigger, switching them etc.
> This has not worked. I also have replaced the jacks.
>
> Bypassing the input jack as seen here:
> http://oldsocksandnewtoys.blogspot.com/2009/01/doepfer-117-mod.html
>
> This allows me to run signal in and hear it with clocked digital
> noise as well, so it sort of sounds like a bit reducer. Cool but
> not correct.
>
> What other parts should I replace to see if I can get this to work
>
> Thanks

What happens when you connect the EXT.CLC input to another clock source
(e.g. rectangle of an LFO or VCO)

If then the module is working it's a problem with the internal clock
oscillator of the A-117 or a problem with the switching contact of the
EXT.CLC socket.

Best wishes
Dieter Doepfer