Casio CZ/ VZ/ FZ - Pro Series

Just got a used CZ101.
It's all fine but the bendwheel.

Halfway up and halfway down it stops bending and turns silent (down) or jumps to an 
extremely high frequency (up).

Took out the potentiometer and tested it. It seems fine but it's quite far from its printed value 
of 50k. It's something like 42k.

I guess it could help if I change it to one closer to 50k. Anyone who's tried this?

But I also though maybe there's a way to adjust the bend balance inside the CZ101. I notice 
there are at least four trim pots inside the machine. But I have no idea what they do so i 
don't want to adjust them at this stage.

Is any of these trims involved in adjusting the pitch bend range/balance?

howdy,

 Iwould start out with a nice CLEN pot, 50k is probably all right,
Go into the pitch bend ranges on the front panel, testing different 
settings. Then and only then would I go inside. I'd like to gat a 
service manual for a CZ-101, also a CZ-1, Also a CT-270. That would 
make things fun. I STILL use a pair of the TB-1, the 2x8 "midi 
through box" as they called it, they have never failed me. Using old 
junky wall warts, dropping, whatever. Of course, that's  just part of 
my midi switching system, but they were the first and still going 
strong.
Rig

--- In CZsynth@yahoogroups.com, "torsig1967" <torsig1967@...> wrote:
>
> Just got a used CZ101.
> It's all fine but the bendwheel.
> 
> Halfway up and halfway down it stops bending and turns silent 
(down) or jumps to an 
> extremely high frequency (up).
> 
> Took out the potentiometer and tested it. It seems fine but it's 
quite far from its printed value 
> of 50k. It's something like 42k.
> 
> I guess it could help if I change it to one closer to 50k. Anyone 
who's tried this?
> 
> But I also though maybe there's a way to adjust the bend balance 
inside the CZ101. I notice 
> there are at least four trim pots inside the machine. But I have no 
idea what they do so i 
> don't want to adjust them at this stage.
> 
> Is any of these trims involved in adjusting the pitch bend 
range/balance?
>

I'm going to chime in with the same advice I always give.  You may have 
already tried this, because it's really basic and simple advice.

Make sure you intialize any used Casio you get, or any Casio that you 
take out of storage.  I have had exactly similar problems to the one 
you're describing, where the wheel seems to work but the data it 
transmits is screwed up.  Initializing the machine resets all the 
internal data.  The problem you describe sounds more like a data problem 
to me, rather than a hardware problem.

To initialize the machine, turn it on, flip it over, and press the "P" 
button with a long, thin implement.  This has always cleared up a wonky 
pitch wheel for me.

You probably already tried this, because you know your way around 
electronics.  If so, disregard this message.  If not, make sure you try 
it.


--- In CZsynth@yahoogroups.com, "torsig1967" <torsig1967@...> wrote:

>
> Just got a used CZ101.
> It's all fine but the bendwheel.
> 
> Halfway up and halfway down it stops bending and turns silent (down) or jumps to an 
> extremely high frequency (up).
> 
> Took out the potentiometer and tested it. It seems fine but it's quite far from its printed value 
> of 50k. It's something like 42k.
> 
> I guess it could help if I change it to one closer to 50k. Anyone who's tried this?
> 
> But I also though maybe there's a way to adjust the bend balance inside the CZ101. I notice 
> there are at least four trim pots inside the machine. But I have no idea what they do so i 
> don't want to adjust them at this stage.
> 
> Is any of these trims involved in adjusting the pitch bend range/balance?
>

I just bought a CZ-1000 (same thing as the 101, just bigger keys), and
I had the exact same problem. After a few days of using the keyboard
(and the wheel a lot) it just stopped doing it and havent had a
problem for the past two weeks.


--- In CZsynth@yahoogroups.com, "torsig1967" <torsig1967@...> wrote:
>
> Just got a used CZ101.
> It's all fine but the bendwheel.
> 
> Halfway up and halfway down it stops bending and turns silent (down)
or jumps to an 
> extremely high frequency (up).
> 
> Took out the potentiometer and tested it. It seems fine but it's
quite far from its printed value 
> of 50k. It's something like 42k.
> 
> I guess it could help if I change it to one closer to 50k. Anyone
who's tried this?
> 
> But I also though maybe there's a way to adjust the bend balance
inside the CZ101. I notice 
> there are at least four trim pots inside the machine. But I have no
idea what they do so i 
> don't want to adjust them at this stage.
> 
> Is any of these trims involved in adjusting the pitch bend
range/balance?
>

Pitchblende contains radioactive isotopes (mostly Uranium), which
could kill you, producing silence. The half-life of U-238 is over 4
billion years, which is a very low frequency, so probably, strange.

Mental illness doesn't have such a stigma these days.
Your doctor can help )

----- Original Message ----- 

From: "synergeezer" <synergeezer@...>
To: <CZsynth@yahoogroups.com>
Sent: Saturday, February 09, 2008 5:17 AM
Subject: [CZsynth] Re: Pitch bend producing silence and strange frequencies.


> Pitchblende contains radioactive isotopes (mostly Uranium), which
> could kill you, producing silence. The half-life of U-238 is over 4
> billion years, which is a very low frequency, so probably, strange.
>
>
>
>
> Yahoo! Groups Links
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>