Discussion about the Korg PolySix synthesizer

hi all
i've just subscribed to your group
i am a french user of the great Korg P6 
but mine have a big problem , the waveform generator doesn't work
does anyone know which board manage the waveform of the p6
and another problem is the arpegiator, the led is ok, but when is turn on and i press on any key there is nothing
do you think is the same board than the previous problem or another one

best regards to all

thanks

Florent.