> It was my first thought, but the fuse its ok, and its not inside
> the transformer.
>
> I have the A-100 DIY Kit #1 and the problem its on the transformer.
> I can hear the transformer working but its not giving me output power....
> I check with the multimeter (AC mode)....
>
> thanks

If the transformer does not output a AC voltage it is defective and has to
be replaced (please do no try to repair it, that's dangerous to life). They
are available as spare parts. Please contact the Doepfer representative in
your country.

Best wishes
Dieter Doepfer