Discussion about the Korg PolySix synthesizer

Hi all, 

I keep seeing messages posted regarding tuning etc. I can pretty much 
promise you all that this is caused by the opto on the KLM366. 
Within the last year I have repaired 5 pcb's all suffering from the 
same problem, ie tuning C6 is ok but when you line up C2 to be at the 
correct pitch , the octaves are not correct. I've also see units that 
play an octave over 11 notes C2-B3, not enough range on the pots to 
tune up just to name the common ones. From now I dont even bother 
trying to tune a P6 without swapping the opto as you will most likely 
be wasting yourtime. If you need a pdf copy of the service manual email 
me at ibradshaw@btconnect.com also if you need any tips let me know. 

I have really spent a lot of time last summer figuring how these units 
tick and learnt just about everything I could. I've worked 
professionally (if that's how you spell it!) repairing synths over the 
last 18 years and specialise in Korg, Ensoniq, Kurzweil and Alesis