Casio CZ/ VZ/ FZ - Pro Series

> Test the voltage and see what it does...

I tested the voltage between the first and second pins, and it stays at 
1.20 nearly all the time, but sometimes it drops to 1.00 or raises until 
1.25, and when this happens the sound changes the pitch. When the sound 
is at 1.25 (about one semitone up) I can't use the pitch bend to raise 
it even more, I can only lower it some semitones. I bet this means a bad 
potentiometer, or a bad voltage coming into it. I'll try to buy another 
one, it's a 618k audio pot, am I right? I still haven't tested the third 
pin because the random nature of the problem, but I'm at it.

Manu