Casio CZ/ VZ/ FZ - Pro Series

Heres the story. I bought a CZ-1 that should have been a simple fix. So 
far I have replced most all of the tactile switches on the board under 
the parameter controls. This side of the board looked to had been spilt 
on and most these functions were unaccessible. Now I have all of these 
controls back with the replacements. Next I just replaced the internal 
memory battery. I am experiencing the same kind of volume problem as 
group member discussed on earlier post. This is my first time using a 
CZ or digitally programmed synth. I do not know how to save new 
patches, when i press write it asks where I want to save to?. some of 
my keys velocity is terrible, I would like to turn the velocity 
function off. I am fearing that this keyboard has to many problems I 
cannot fix. I would like to get a hold of a sound cartridge to see if 
when plugged in, my synth jumps to life but right now even when I go 
through and change many parameters I hardly get a change in its sound 
or it goes into some crazy sustain mode were I hit a key and it plays 
out for like over 30 seconds. Is there a way to reset its original 
parameters for the factory presets to come back?  I also have two keys 
that wont play and one you have to press very hard, after cleaning the 
contacts underneath these keys there was no improvement. Any 
suggestions or comments would be greatly appreciated.
thanks,
-michael-

> Is there a way to reset its original 
> parameters for the factory presets to come back? 

Power Off the synth. Push the red button on the top right, "Initialize" 
and maintain it pushed. Power the synth on, and you will be asked in the 
LCD to reset it to defaults. Push "Yes", it's at the bottom of the lcd, 
at the right, with a right arrow on it. Now, release the "Initialize" 
button. Done :)

Manu

Thank you very much, and also at the top middle/right where you can 
pick between like 1  2  1-2  2-2, something like that. it always jumps 
to the second one everytime i change the preset in which it will not 
make sound so i have to push the button three times everytime to get it 
back to the first one where it will sound out of the output. is this 
normal behavior and what do those options represent. I know it has to 
be on the last one for me to select noise or ring modulator.
thanks,
-michael-

sorry for being unknowledgable about this synth. I will pick up a 
manuel soon.

--- In CZsynth@yahoogroups.com, Manu <g.manu@...> wrote:
>
> > Is there a way to reset its original 
> > parameters for the factory presets to come back? 
> 
> Power Off the synth. Push the red button on the top 
right, "Initialize" 
> and maintain it pushed. Power the synth on, and you will be asked in 
the 
> LCD to reset it to defaults. Push "Yes", it's at the bottom of the 
lcd, 

> at the right, with a right arrow on it. Now, release the "Initialize" 
> button. Done :)
> 
> Manu
>

> it always jumps 
> to the second one everytime i change the preset in which it will not 
> make sound so i have to push the button three times everytime to get it 
> back to the first one where it will sound out of the output. is this 
> normal behavior and what do those options represent.

I have had my CZ-1 only four days, but I think that's the normal 
behaviour. Mine makes the same. Different presets change it :)

Manu

Finally found it! Three broken solder pads, corresponding to the legs of 
one of the 2SB632K power amps. Soldering the legs again has fixed the 
audio volume problems :)

Now, I have one more question for you guys. Pitch bend on my CZ-1 works 
about 5.5 semitones down and only 0.5 semitones up. Does anyone have a 
rational explanation for this? I get random small changes in the pitch 
that last between 0.1 to 4 or 5 seconds, and I'm not sure if this could 
be related. Maybe the potentiometer is defective?

Thanks a lot in advance! :)

Manu

>Now, I have one more question for you guys. Pitch bend on my CZ-1 works
>about 5.5 semitones down and only 0.5 semitones up. Does anyone have a
>rational explanation for this? I get random small changes in the pitch
>that last between 0.1 to 4 or 5 seconds, and I'm not sure if this could
>be related. Maybe the potentiometer is defective?

Test the voltage and see what it does...

> 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

>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.

You should measure with respect to ground.  The typical configuration for 
pitch/mod wheels is that the potentiometer goes between the positive and 
negative supply voltages (or positive and ground), and the wiper (middle 
terminal) goes to an ADC.  The potentiometer here acts as a voltage divider 
and the voltage at the wiper terminal varies from one supply voltage to the 
other (or whatever it's connected to).

Today I replaced the pitch bend pot and all the problems disappeared... 
  Fixed! :)

The bad thing is that I've been unable to find a 618k pot to replace the 
original. I bought one of 1000k (1 meg ohm), but I'm not sure if this 
can be dangerous or not. If someone can throw some light into this issue 
I would be very very grateful! :) For now I have not tried to turn it 
until the limits, I just turned it half then moved it a bit until C was 
C and not D# :) It's been working without any problem for about five 
hours now.

Thanks a lot,

Manu

>The bad thing is that I've been unable to find a 618k pot to replace the
>original. I bought one of 1000k (1 meg ohm), but I'm not sure if this
>can be dangerous or not. If someone can throw some light into this issue
>I would be very very grateful! :) For now I have not tried to turn it
>until the limits, I just turned it half then moved it a bit until C was
>C and not D# :) It's been working without any problem for about five
>hours now.

It shouldn't be a problem at all.

> It shouldn't be a problem at all.

Great! Thanks a lot :)

Manu