Probably the old CMOS inside going belly up... Digital IC's in the CS-80 use 1970's lithography. You have about 10-20 year lifespan.
Replace these chips with newly manufactured parts and you have potentially 100's if not 1000's of years. My CS-80 has a partially functioning Bank 2 (dead lower 2 octaves) and any repair that gets the instrument working doesn't last long. Aftertouch is flakey too.
So starting a video series showing a complete electronic restoration of my CS-80 and wanted to share with others. Will become important as a way to free these machines from constant service. First video is in on youtube: "Saving the CS-80".
The complexity and part count of this machine is overwhelming.
Sincerely,
Gavin
--- In yamahacs80@yahoogroups.com, "Rescio" <alessandrorescio@...> wrote:
>
> hmmm. the voices of bank I of my cs80 just went silent (altough some of them give a beep), bank II operates just fine.
>
> I already was planning a service fresh up, including kenton midi install, but now i'm going to speed things up.
>
> Does someone know what might happen here?
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> thanks for helping,
>
> regards,
>
> Alessandro
>