Vintage Synth Repair

my poly6 had a battery leak on the circuit board 
> causing nasty probs.

 You might check out the poly6 mail digest page at  

http://www.acc.umu.se/~amber/Poly6/

scroll down to the section 'battery problems', (its the most 
common problem with a polysix) and go to 'good support page 
by C.S. Ryder' it's a step by step walkthrough to repair damage 
caused by leaking battery.

It's a lot of work, but worth doing it.

Hope this helps, Rik.