[sdiy] Cs-60 Touch Response

[crystal wizard]

Is anybody out there familiar with the touch response circuit on the Yamaha
CS-60.  This one just doesn't work, maybe old CMOS chips?  I spent a while
acquainting myself with the CS-80 touch response only to open up the CS-60
and find the "TRG" board is nowhere to be found.  Perhaps they improved the
Touch response for the CS-80? Also a pointer in the direction of any CS-60
Touch Response schematics would be great.
Thanks
G.