[sdiy] MKS70 power supply issue

[james meagher]

Paul wrote: What does it power in the rest of the machine?

It looks to me like it's going to the Jack board where it would
perhaps feed a PG800 were one plugged in (I don't own one), and also
to somewhere on the assigner board, but my copy of the service manual
is so blurry on the assigner board schematic I can't really tell where
it's going or what it's doing once it gets there.

Mark wrote: Is that measurement unloaded? Because that supply line is
unregulated, it will likely droop when it's loaded. Maybe 3 volts...

I've got everything plugged in, the machine is receiving MIDI and
making sound and this out still reads 10V on the dot. But if it's a
PG800 it's looking for I can't help it there.

Cheers,
James

> >>
> >> You can see the schematic of the PSU here:
> >> https://www.dropbox.com/s/jstusojn3610cf6/RolandMKS70PSU.jpg