Yamaha CS80

I have an issue with my CS80....  I did a upgrade to the newer VCO chips about 20 years ago... and ordered 2 M boards from overseas with what I believe is the original Chips.... I remember having to move a diode (or add one )right beside the chip.... my problem is, during spring, I realized osc 1 bank one was down... Filter still showed up with white noise and Eg worked but no Sine or Saw or Pulse was audible.... 

well the idiot I am, installed one of the other M board osc Chips in Backwards ( I know right? ) FFS....  any Idea what I may have damaged in the process? if I try the replacement chip in the correct way, it interferes with Bank 2 (same osc)... leaving it empty allos osc 1 bank 2 to work....  and worst, Im in Winnipeg Canada..... probably the only local CS80 here.... (rumours there was another... ) 

Any Wise sugestions ? 


---- On Fri, 30 Oct 2015 12:34:32 -0500 david@therogoffs.com [yamahacs80]<yamahacs80@yahoogroups.com> wrote ---- 

       
Hi all.


I know the group has been pretty sleepy lately.  I'm not worried since everyone is busy and activity always waxes and wanes.  I hope to be posting a lot soon.  I've had a rough last few months; I've been out of work and just got a new job and my wife, who was pretty healthy her whole life, had a heart attack out of nowhere!  She's much better now and things are recovering around here so I should be able to start working on the CS80 mods I was in the middle of.


 David