Casio CZ/ VZ/ FZ - Pro Series

yes, with the relay removed the headphone out still functions and i hear the same 
distortion on it.

The cz1000/cz101 schematic is here: 

http://casionova.org/casio_manuals/CZ1000ServiceManual.pdf

It is not the key contacts since controlling via midi i get the same distortion. It has to do 
with the cumulative volume of all the voices... so normally in mono mode i don't get any 
distortion. In poly mode when i play sounds with fast attacks...e.g. synth bass, if i play a 
couple of voices simultaneously it distorts. If i adjust the volume slider i still hear the 
distortion (just quieter)

the example here shows it:

http://www.olilarkin.co.uk/temp/cz-crackle.mp3

thanks,

oli


--- In CZsynth@yahoogroups.com, ActionClaw <actionclaw@...> wrote:
>
> Are you saying that, with the relay completely removed from the circuit, you DO still get 
output from headphone jack (but NOT from the line outs)?
> 
> > ..If i had read the circuit better i could have done this without removing it..
> 
> Do you have a service manual/schematic specifically for the CZ-101?
> 
> If yes, is it available online? Link?
> If no, in this group there was recently a link to the CZ-5000 service manual that might 
prove helpful troubleshooting.
> 
> 
> 
> > does anyone have a clue what other components might be at fault?
> Unfortunately, plenty. Is the distortion continuous or only upon each key down as if 
dirty key contacts? (That would be lucky!)
> 
> This is probably pretty obvious but I don't remember if you said whether or not you got 
the same result when controlled via another midi device: keyboard, sequencer, etc.
>