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Vintage Synth Repair

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Prophet 600 help.

Prophet 600 help.

2003-09-11 by slurfius

Well,
  I have two prophet 600s One works great and I love it's sounds.  
The other I bought broken just for parts mostly.  But I've fixed a 
few of it's problems and only two things are keeping this prophet 
from rising from the dead.  The first problem is that none of the 
knobs work at all.  The push buttons all work but the knobs and 
switches do nothing to the sound.  There is nothing I could see when 
comparing the two prophets circuits that appears wrong.  The other 
thing that totaly sucks is the midi ports don't work at all either.  
Got any ideas what I should check out? Thanks.

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