Yamaha CS80

I've had CS80s do this when I've shorted something and blown one of the 
DC fuses in the power supply. Are you sure all the supply voltages are 
there?

Heath Finnie wrote:
> This is a big question here. The CS-80 I'm working on will barely change pitch all the way up 
> the keyboard now. Some keys will play a little lower but not much. Now here are the 
> symptoms:
>
> I replaced most all the IC's on the sub board. I replaced the entire KAS board with a working 
> one. Problem does not change.
>
> The pitch ribbon is having no effect on pitch. Neither is the pitch knob.
>
> The channel 2 detune IS working as is the footing sliders.
>
> Ring modulator is working, sub oscillator is working and so is all the waveforms.
>
> Any of the tech guys able to help?
>
> 	
>