Casio CZ/ VZ/ FZ - Pro Series

If a schematic is not possible take pictures of the battery 
connections inside the synth and the area around any of the chips 
that have 28 pins. The memory will be held on 1 or 2 of these IC's. 
If you have a voltmeter see which pins are powered by the batteries 
on these chips when the AC power is removed. Then use a 3 volt 
CR2032 lithium battery to maintain power to these pins. Isolate the 
plus side with a small diode so the synth power can't backfeed the 
lithium battery and you will have memory backup without the 6 "D" 
cell worries. If you want help I can help offline. My CZ5000 has 
this sort of setup from the factory as it uses 3 "AA" batteries to 
maintain the memory on power down. Of course the CZ5000 isn't able 
to run on batteries because of the extra options onboard. 
  Good luck and be careful! Narfman

--- In CZsynth@yahoogroups.com, "altamontunion" <altamontunion@...> 
wrote:
>
> If we can just figure out what part of the synth needs to keep 
that 
> voltage running through it, we can just find the +voltage / -
voltage 
> ports and maybe just solder on a 3V lithium watch-battery cell, 
like 
> on the Korg Poly 800.
> There's got to be some way of doing this; I can try tinkering with 
> it, the CZs have that hard-reset button that resets all the 
presets 
> so if I totally botch stuff up, hopefully I can just reset it all. 
As 
> is, I gave up on using programmed patches, because the 6 D 
batteries 
> just vanish -- lithium, alkaline, rechargeable, or otherwise. It's 
> just not worth it spending that much money on D batteries. There 
must be a better way.
> 
> --- In CZsynth@yahoogroups.com, "Scott Nordlund" <gsn10@> wrote:
> >
> > >If we could hack the CZ-101 / CZ-1000 / etc. to have this sort 
of
> > >dedicated memory, it would finally end our dependency on six 
> expensive
> > >D cells (which I've found rapidly run out, even when I ONLY use 
> the AC adapter!).
> > >And in addition, that 3V cell in the Korg Poly-800 lasts for a 
> good 7
> > >years or so. Let's brainstorm.
> > >Any schematics anywhere?
> > The problem you're facing probably isn't that the batteries get 
> drained- 
> > alkaline batteries (or whatever you're using) don't have a very 
> good shelf 
> > life.  Lithium batteries (used for memory backup) last much 
longer.
> > As for schematics, I haven't seen any around.  There doesn't 
seem 
> to be much 
> > of a scene for modding/repairing CZ synths.