Yamaha CS80

There is a complete analysis of the custom chips in the Yamaha CS 
Servicing Guide.  I used this book to work out IG series equivalent 
circuits a dozen or so years back.  It covers the YM parts too.  There 
was a pdf of it up somewhere....yeah, here:

http://www-personal.umich.edu/~damont/YamahaCSSeriesSynthesizerServicingGuidePOSTED.pdf

Crow
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On 3/1/2015 7:17 PM, gearfire01@... [yamahacs80] wrote:
>
>
>
> Hello CS80 users,
>
> Probably as most CS80 owners, i am aware that the most critical parts 
> in the beast are the 2 main LSI's (YM26600&Ym26700), as their failure 
> could quickly become problematic, since they are Yamaha proprietary 
> and for this reason, hard to find/replace.And because they are the 
> brain of the system, i guess it's important to rely on them in first 
> place, before doing any other work/check further in the synth.
>