Casio CZ/ VZ/ FZ - Pro Series

Hi Atom,

At 11:39 12.08.01 -0400, you wrote:
>> Ok, so it was the right decision to connect 8 with 4 and 9 with 13... it
>> crackles a little when turning on the synth, but I think it's easier then
>> replacing the chip
>=================================
>if the relay is not doing what it should, it probably has it's inputs
>going to the dummy-load. if you remove the relay, and just run wires
>around it, you may notice an increase in output level.

It looks like it's doing what it should do, but it seems like the contacts
are simply to oxydated other then that I guess there would be a connection
between the input and the dummy load? But I might check that when I open it
again...

>it seems that the relay is there to mute the outputs while the synth is
>turning on, and in an unstable state.

I thought so...

>> Another thing, there are 3 adjustable resistors on the same board, one is
>> for the headphone output but I haven't found out what the other two (sitting
>> close to each other) for. I may have changed their value while trying out
>> what causes the output to have problems. It would be nice if you look up
>> their purpose?
>===================================
>VR1 - ouput levels (headphone & main outs)
>VR2, VR3 control the "VCA Offset Voltage"

I'm not sure if I understand what it's for. Is correcting the amount of DC
found in the signal??? 

>i posted a crappy picture of the circuit here:
>(i don't have a scanner)
>		http://smasher.suspicious.org/casio-cz/vca.jpg

It's quite ok!!! THANX!!!

>pins 3 of the M5241L is analog ground.
>pin 1 of LA6462D-2 (labeled C).
>pin 7 of LA6462D-2 (labeled D).
>
>use a digital volt-meter, or an analog meter only if it has high-impedance
>inputs.
>
>while the unit is making no sounds;
>with one probe on pin 3 of the M5241L, put the other probe on one of the
>other test-points, [C] or [D], and adjust so that the voltage is less than
>3mV.
>repeat for both test-points.
>
>it seems that VR3 would adjust test point [C], but the manual says it's
>the other way around?

Hmmm, so I might have to open it again... any idea what could be the worst
thing happen if I don't adjust those settings? Since changing don't seem to
have an effekt on the sound...

Thanx for you help!

Summa


			     
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           +                 Nicknames  : Summa or SumGhost
           +                 AIM        : Flotorian
           +                 Born       : 1967
           +                 Profession : Student of Computer Science
           +	                     

A Touch of Future - Project : http://www.mp3.com/AToF/
Casio CZ Synth Station      : http://www.mp3.com/stations/CZ/ 
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