Vintage Synth Repair

Thanks,

The transformer indeed has taps for both 240v and 220v,
but there's also an "AC Filter" board placed between the outlet
and the transformer.

See the powersupply schematics on the files section under the name of:
"mks70 ps.JPG"

The schematics shows that the only components which are different 
between the various voltage models is L1 and the fuse.

I guess that the L1 part cannot handle 220v-240v so the only way I can
still use 220v-240v is to take the filter board out entirely and 
connect the outlet directly to the transformer with a fuse placed in
between ? 

Will that work or is the filter board crucial for the correct
operation and lifespan of the instrument ?

Also, the outlet voltage here is 228v. Should I tap the 240v or 220v
input on the transformer ?

Thanks all !













-- In vintagesynthrepair@yahoogroups.com, Russell Rose <russrose@...>
wrote:
>
> My Roland schematic indicates that there are various taps on the  
> primary of the power transformer
> for100V117V220V240V. You'll have to look inside of course.
> On May 16, 2008, at 12:51 PM, gil_we wrote:
> 
> > Does anyone have any idea how a 110v MKS70 can be internally converted
> > to 230v ?
> >
> > Thanks !
> >
> >
> > ------------------------------------
> >
> > Yahoo! Groups Links
> >
> >
> >
>