The Kawai & Teisco Analog Synths Group

JB both kawai usa and kawai japan have told me the number of units made has been lost to history.make sure to take care of that nicad for a long lasting lifew.

--- In kawai-teisco@yahoogroups.com, "kb_cheapmods" <kerrybradley@...> wrote:
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> Mine had similar problems when I got it.  
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> It still had the old battery so I clipped that out first.  Then inspection around the battery area revealed darkened discolored PCB traces.  I took my ohmmeter and did continuity checking on them.  I found that, while the traces didn't LOOK open, some of them actually were.  I found two that were open, so I used jumper wires to bypass those open traces.  That fixed the synth.
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> I then replaced the old battery with a CR2032 holder and diode in series so that I could reload and have saved patches.  It's a really nice sounding synth!!!
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> So, first remove that battery, then see if there are damaged traces, then repair those.  Good luck!
> 
> --- In kawai-teisco@yahoogroups.com, "jimmyb00ts" <jimmyb00ts@> wrote:
> >
> > So, the first thing I should do is remove the NiCad battery, right? Do you think the stuck notes could be a symptom of the circuit board being damaged?
> > 
> > Thanks for your help.
> > 
> > - JB
> > 
> > --- In kawai-teisco@yahoogroups.com, "siwanyzki" <staniwan@> wrote:
> > >
> > > I use my all the time with no battery.  I have all the settings for my presets written down.  All the memory locations default to the "Basic SX240" settings.   You can replace the nicad battery with a standard CR2032 Lithium battery with a diode in place so the lithium battery does not receive a charge from the synth charging circuit.  The battery would explode without a diode in place.
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> > > --- In kawai-teisco@yahoogroups.com, "jimmyb00ts" <jimmyb00ts@> wrote:
> > > >
> > > > Hello all, I searched the archives so apologies if these subjects have been definitively responded to.
> > > > 
> > > > Can I use this synth without a battery (in other words, if I desolder the internal original NiCAD battery, will the synth work as normal, save for the inability to save presets?)
> > > > 
> > > > My SX-240, which I just received, is in near-mint condition cosmetically; however when I turn it on, four consecutive notes in the lower half of the keyboard are constantly droning. Does this mean I have circuit board damage from a leaking battery, or just that said battery is dead? 
> > > > 
> > > > Where can I find a replacement LI-ION battery as opposed to a NiCAD (I found links in previous posts to NiCAD batteries but I don't want to deal with a hazardous battery once again in 2024!)
> > > > 
> > > > Finally, how many of these synths were produced? I have read estimates including 1000 and 3000 total. Has anyone got the definitive number or something close?
> > > > 
> > > > Thanks for your patience and time!
> > > > 
> > > > - JB
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