Vintage Synth Repair

Can't help with a schematic, but with no power...

1) Check mains voltage at transformer, switch OK, fuse OK?
2) Check DC supply voltages inside, replace any old filter capacitors.
3) Check supply voltages at chips.
4) With power off, reseat any socketed parts and power up again.

Others may have more specific troubleshooting ideas.  These are pretty
general.

-Mike


--- In vintagesynthrepair@yahoogroups.com, Sean Carter
<seancarter777@...> wrote:
>
> 
> 
> Im trying to fix and oberheim ob3 does anyone know how to get a
schematic
> for them? This think wont even power up, so im not sure what to do
first.
> 
> Thanks
> Sean
>