Yamaha CS80

Hi ,

Let us know what has been done/restored previously to this particular YAMAHA CS-80 ? Are the original 4000-Series CMOS chips still in there ? Have you started replacing some capacitors, yet ? How long have you had this machine ? Has it ever played (I mean while you have it ) ?

Csaba

On Apr 18, 2010, at 4:46 AM, tmoravan wrote:

> OK - time to yell for help.
> 
> Cleaning up a CS-80, and there's no voices sounding when playing a key. Started debugging at the KAS. All power looks good, note values are registering. Nothing appearing on the trigger outputs. Going backwards, the U1 -> U5 are mostly pegged at 8.48v and do not change no matter where on the keyboard I press.
> 
> Is this a dead YM26600, or is there something else causing this?
> 
> While I'm here, what should the clock input on pin 2 really look like? I'm not really seeing a stable square wave kind of oscillation there.
> 
> thanks
> 
> 



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