Doepfer

>
> > -----Ursprüngliche Nachricht-----
> > Von: Doepfer_a100@yahoogroups.com
> > [mailto:Doepfer_a100@yahoogroups.com]Im Auftrag von Aris
> > Gesendet: Sonntag, 29. Juli 2012 08:10
> > An: Doepfer_a100@yahoogroups.com
> > Betreff: [Doepfer_a100] Problem with A-190-2 Midi-to-CV/Gate...
> >
> >
> > I've had this module about 2 months, and it's been working fine
> > until today. When I press a key on my midi keyboard controller,
> > the LED lights up, and the CV pitch changes....but there is a
> > consistent ~5V at the gate jack. It doesn't drop to zero when I
> > release the key....it stays consistent at around 5V. All other
> > jacks are working normally when the appropriate midi controller
> > function is activated.
> >
> > Anything I can do for a DIY repair? Thanks for your help
> 
> Probably the gate transistor is defective. This may happen if the A-190-2 or
> even another module on the same bus is installed in the wrong. The problem
> should be solved by replacing the transistor (BC547) behind the learn
> button. Any npn transistor with the same pin-out as the BC547 should work.
> 
> We are about to change the design of the A-190-1/2/3 because this happened
> several times in the past because of reverse installed modules.
> 
> Best wishes
> Dieter Doepfer
>

>
> It reminds me how i burnt my MCV-4 applying reverse current to Gate out. (tried to use standard Gate mode with S-Trig synth)
> 
> --- In Doepfer_a100@yahoogroups.com, <yahoo@> wrote:
> >
> > > -----Urspr�ngliche Nachricht-----
> > > Von: Doepfer_a100@yahoogroups.com
> > > [mailto:Doepfer_a100@yahoogroups.com]Im Auftrag von Aris
> > > Gesendet: Sonntag, 29. Juli 2012 08:10
> > > An: Doepfer_a100@yahoogroups.com
> > > Betreff: [Doepfer_a100] Problem with A-190-2 Midi-to-CV/Gate...
> > >
> > >
> > > I've had this module about 2 months, and it's been working fine
> > > until today. When I press a key on my midi keyboard controller,
> > > the LED lights up, and the CV pitch changes....but there is a
> > > consistent ~5V at the gate jack. It doesn't drop to zero when I
> > > release the key....it stays consistent at around 5V. All other
> > > jacks are working normally when the appropriate midi controller
> > > function is activated.
> > >
> > > Anything I can do for a DIY repair? Thanks for your help
> > 
> > Probably the gate transistor is defective. This may happen if the A-190-2 or
> > even another module on the same bus is installed in the wrong. The problem
> > should be solved by replacing the transistor (BC547) behind the learn
> > button. Any npn transistor with the same pin-out as the BC547 should work.
> > 
> > We are about to change the design of the A-190-1/2/3 because this happened
> > several times in the past because of reverse installed modules.
> > 
> > Best wishes
> > Dieter Doepfer
> >
>

>
> > Hi
> >
> > I plan to buy a A-190-2 in the near future - any idea when the
> > revised version will be available?
> >
> > Kind regards
> 
> We expect the fist batch of the revised version of the A-190-2 about
> September 2012. The only difference is a 100 Ohm protection resistor in the
> gate output. But you should always pay attention to install all modules in
> the right way. Even the protection resistor of the A-190-1/2/3 will not
> prevent damages if a module is installed in the wrong way. It protects only
> the Gate output of the (correct installed) A-190-1/2/3 module if another
> module on the same bus is installed in the wrong way. It does not prevent
> the damage of the other module !
> 
> Best wishes
> Dieter Doepfer
>