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
>