OBERHEIM SYNTH

>
> First at all, Hello to the members of this list. 
> My name is Sergio, from Spain. 
> A friend of mine gaves me his Xpander for repairing, and now I am in 
> a very big trouble with its PSU.
> I don't know if it is an earlier or later production unit (it has no
> serial number) but the power supply is different to that described
> on the service manual. On the schematics they represents a PSU with
> just 2 transformers and a 5561 as pulse width IC... and mine's have 3 
> transformers and a MB3759 as PW IC. 
> I don't know if someone here would have that PSU scheme, it seems to be
> a very hard-to-obtain info... but, if some Xpander owner have that type
> of power supply on his unit I would need just "detailed photos" of it, 
> and possibly the values of the components, since there are some missing
> ones.
> Any kind of help will be very welcome and appreciated.
> Thanks in advance.
> Sergio
>

>
> So, nobody has any technical info about that second PSU design?
> I really needs to do something with the Xpander.
> Thanks again
> Sergio
> 
> --- In oberheim@yahoogroups.com, "kovalmoog67" <synthoma@> wrote:
> >
> > First at all, Hello to the members of this list. 
> > My name is Sergio, from Spain. 
> > A friend of mine gaves me his Xpander for repairing, and now I am in 
> > a very big trouble with its PSU.
> > I don't know if it is an earlier or later production unit (it has no
> > serial number) but the power supply is different to that described
> > on the service manual. On the schematics they represents a PSU with
> > just 2 transformers and a 5561 as pulse width IC... and mine's have 3 
> > transformers and a MB3759 as PW IC. 
> > I don't know if someone here would have that PSU scheme, it seems to be
> > a very hard-to-obtain info... but, if some Xpander owner have that type
> > of power supply on his unit I would need just "detailed photos" of it, 
> > and possibly the values of the components, since there are some missing
> > ones.
> > Any kind of help will be very welcome and appreciated.
> > Thanks in advance.
> > Sergio
> >
>