Yamaha CS80

Well after being fired up for the first time in many years there is a problem or two. (it actually 
had a few, but they seem to be sorting themselves...)

1. Panel setting on Channel 1 if I turn off both oscillators there is still plenty of sound. All the 
other panel controls are effecting the sound though.

2. Voice 3 on Channel 2 is outputting only noise instead of a saw/square. Sine is working 
well.

Any help would be great!

Thanks,
Heath