Vintage Synth Repair

Thanks Kris and others,

I replaced the bridge rectifier and cleaned all the gunky flux off the 
+5V power supply board soldering; now I have good power but some very 
strange voice behaviour (display works correctly; values on the analog 
page respond to knob turns correctly; voice 1 drones occasionally; 
keyboard does not play notes properly although aftertouch does have some 
effect; some waves produce distorted sounds but most don't; bender and 
mod wheel affect the droning oscillator as expected; etc etc.)  Time to 
break out the CRO and see what I can find wrong next.

Thanks for your help!

Cheers,
A.