[sdiy] A part for a CS20M

MTG grant at musictechnologiesgroup.com
Mon Jul 1 18:30:47 CEST 2013

OMG, why would they make a custom chip for a relatively standard 
function like this?  What's the COM line hooked up to in the synth? Or 
better yet is there a link to the CS20M schematic? I imagine there would 
be a standard chip workaround, however the amount of work required 
remains to be seen.


On 7/1/2013 9:14 AM, John Henson wrote:
> Hi all,
> I am looking for a chip for a Yamaha CS20M, it is called a YM617 on 
> the chip, and the Yamaha IC guide calls it a YM61700, it is a serial 
> multiplexer, and the failed one runs the patch selection LED's.
> Does anyone have any of these, or knows where to get them?
> Regards,
> John.
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