Doepfer

Why are you sending 2 copies of every email?  Please stop that.

On Wed, Feb 16, 2011 at 10:56 PM, Sidney <sidney_honi@yahoo.com> wrote:

>
>
> Mr. Doepfer. I successfully changed the A-190-2 Q1 resistor by replacing it
> with a BC547B transistor and the gate output is now working. But I think
> that the CV V/V output is not working. Is there any piece I can replace to
> fix this?
>
>
> Thank you,
>
> Sidney
>
> --- In Doepfer_a100@yahoogroups.com, <yahoo@...> wrote:
> >
> > > I think I had plugged the A190-2 the wrong way the first time I
> > > plugged it into the power bus board, and might damaged the unit.
> > > It seemed to be working fine, as it was receiving midi messages
> > > and activating the A110 both from the CV1 and pitch bend from
> > > CV2. But the gate output problem and out of tune scale indicated
> > > there is something wrong really. Maybe I will be necessary to buy
> > > a new one.
> > >
> > > Thank you for the kind attention.
> > >
> > > Sidney.
> >
> > If the A-190-2 was plugged in the wrong way the gate output is fried. In
> > this case the collector of the npn gate output transistor is connected
> > to -12V which destroys the transistor. This explains why the gate output
> > does not work anymore. It is difficult to say if other sections of the
> > module are defective too. You may try to replace the transistor (Q1,
> BC547C)
> > to see if this is the only defective part. Or you send in the module for
> > repair to the dealer where you purchased the device.
> >
> > Best wishes
> > Dieter Doepfer
> >
>
>  
>


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