Casio CZ/ VZ/ FZ - Pro Series

Any idea what's causing my CZ to randomly re-set itself??

It turns on fine, and plays fine, but every now and then, it will 
reset itself, and go back to internal patch A1 (Brass Ens). Also, the 
Tone Mix, Key Split, Normal and MIDI buttons are always lit, but can 
still be used. 
Very strange I know, my first thought would be a power supply issue, 
but the button thing makes me wonder. Of course it could be unrelated, 
but I'd like to see if anyone else has any ideas.

My CZ5000 was doing this same thing. It was the rubber pad that is 
glued to the center keyboard support under the top panel. It had fallen 
into the synth because the glue was old. Then the top panel was 
shorting out on the support causing the synth to reboot. The clue was 
every time any pressure was put on the top button panel it reset. This 
may not  be the problem but it's a good place to start. This is 
probably related to the lights being on when no one is home. There is a 
short on the board somewhere to latch all those leds on. 

Good luck, Fran 

--- In CZsynth@yahoogroups.com, "jaicensolo1983" <jaicensolo1983@...> 
wrote:
>
> Any idea what's causing my CZ to randomly re-set itself??
> 
> It turns on fine, and plays fine, but every now and then, it will 
> reset itself, and go back to internal patch A1 (Brass Ens). Also, the 
> Tone Mix, Key Split, Normal and MIDI buttons are always lit, but can 
> still be used. 
> Very strange I know, my first thought would be a power supply issue, 
> but the button thing makes me wonder. Of course it could be 
unrelated, 
> but I'd like to see if anyone else has any ideas.
>

I haven't seen a schematic, but generally there's a circuit that will only allow the CPU to operate once the power supply has stabilized (so that it works properly when you turn it on).  If the power supply is marginal or has an intermittent connection, it could cause this.  It could be something else, but this is probably the most obvious place to look.

To: CZsynth@yahoogroups.com

From: jaicensolo1983@...
Date: Mon, 3 Mar 2008 12:16:17 +0000
Subject: [CZsynth] CZ3000 Problem
















  


    
            Any idea what's causing my CZ to randomly re-set itself??



It turns on fine, and plays fine, but every now and then, it will 

reset itself, and go back to internal patch A1 (Brass Ens). Also, the 

Tone Mix, Key Split, Normal and MIDI buttons are always lit, but can 

still be used. 

Very strange I know, my first thought would be a power supply issue, 

but the button thing makes me wonder. Of course it could be unrelated, 

but I'd like to see if anyone else has any ideas. 




      

    
    
















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