Yamaha CS80

Hi RJ,





Possible causes:



Look see if the trig voltage is present at M23's TR point on the 
back edge of the voice card. If it is not there, then there is a 
brake in the wire from M13's TR point. If it is, then it may well be 
a filter ic or the vco ic or the final vca that may be gone. If you 
have a scope look and see if there is a waveform on the vca's useing 
the front panel for square and sine outputs. Also check the O point 
and see if the wire has come away. This is the white wire at the 
bottom edge of the voice card.



Let me know how yo get on.