[sdiy] fabbing a keyer chip Yamaha YM62100

[Richard Atkinson]

Hi Bob,

It's sending Yamaha key code data. Very similar to the CS-50/60/80 key code 
data. I have the SK-30 service manual if you want to see it.

Richard


On May 11 2010, Bob Weigel wrote:

>These were common failing pieces.  I just got in a working SK20 that I 
>fixed up and did some probing to see how the thing works.  Most of the 
>pins are just a scan matrix of course... and It's sending some kind of 
>code out the 4 lines that have resistors by them in the diagram.  Does 
>anyone have an actual spec sheet on that one before I try to figure out 
>what it's sending out to the tone generation chips?
>_______________________________________________
>Synth-diy mailing list
>Synth-diy at dropmix.xs4all.nl
>http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>