Doepfer

> My A-190-1 has stopped working. It seems to be sending a constant
> gate signal and not communicating with midi. Seems to be since I
> removed the A-140 (the power was off!!!!!)
>
> Tried reseting but no dice. Oh and the reset and gate LED's are
> constantly on
>
> Any suggestions?
>
> Cheers,
> Richard

Please contact our A-190-1 specialist Matthias Marass
(keyboards-at-doepfer-dot-de). He is responsible for service and repairs of
the A-190-1. I'm not very familiar with the A-190-1 (no analog circuits, too
much digital :-)

I only know that there is one thing that happens now and then to A-190-1. If
the A-190-1 itself or even one of the other modules on the A-100 bus is
connected in the wrong way to the bus (vertical displacement) it may happen
that the +12V and +5V are shortened and the +5V are overwritten by the +12V
after power on. This will destroy the A-190-1 (or any other module that
requires +5V) because the +5V circuit is powered with +12V. So you should be
careful (as usual) when installing or changing modules to the bus board as
described in the user's manual (pages 4 and 5 in the introduction).

Best wishes
Dieter Doepfer