the ground point probably connects to a large conductive area. i don't
know which wire is ground though. it probably won't hurt anything to
try both ways; i think i've hooked up adaptors with the wrong polarity
before.

--- In tr-707@yahoogroups.com , "Ryan" <ryan@...> wrote:
>
> Hi,
>
> I've inherited an old 707 with a no adaptor input. The Roland AC
> adaptor that came with it seems to have been soldered directly onto
> the board at some point. The messy solder job has covered the marks
> on the board and I can't tell which wire to solder back onto the two
> points. One wire is black, the other has a white stripe along it.
>
> Anyone know which way to solder these back on (top or bottom point
> from the adaptor input on the board)
>
> Thanks
>
> Ryan
>