> yesterday it was still working but today when trying to feed
> audio through it it doesnt shift it,
> not up not down, nowhere, the audio goes throuht it and the level
> pot works but all else is
> dead, no shifting occurs.
> Is this a common problem and something I can fix or is my
> frequency shifter totally screwed
>
> -Wille

I think you will have to send in the module for repair. If the original
signal appears at the output without any shifting something is totally
wrong. Normally the original signal does not appear at the output. There is
no share of the original signal available at the output but only the signal
processed by the two analog multipliers which are fed by the sine/cosine
signals of the internal quadrature VCO. If the VCO would be dead there would
appear no audio signal at the output. From the distance I'd suppose a
defective multiplier (MC1496). An A-126 not connected to the A-100 bus would
behave a bit like what you described.

Did you change anything since yesterday (e.g. moving the module, any
modification e.g. connecting the A-143-9 quadrature LFO/VCO instead of the
internal VCO or anything else)

Best wishes
Dieter Doepfer