The Kawai & Teisco Analog Synths Group

This is what was done to mine before I bought it from the member here.

boardjunkie

 my 240 I used a "AA" size battery holder and found a 3.6v lithium battery in the AA size. Used silicone glue to secure the batt holder to the pcb and ran the leads (with a diode in series, 1N400x will do)  back to where the original battery tabs soldered down. I'm sure there's a fancier way to do it, but it works just fine. The series diode keeps the charging circuit from attempting to charge the lithium battery.

 
I opened my sx240 up a few times in the time I owned it for a tech to trying to track a minor issue.He was unable to find the issue but it was going strong at about 98% .Then one day my sx then decided to fix it self as crazy as thats sounds it did I was like wtf .My sx240 has done me well and just in case I decided to get some spare chips if that issue ever comes Im coverd.



--- In kawai-teisco@yahoogroups.com, "waketek" <djwaketek@...> wrote:
>
> A close up Picture would be awesome!!
> 
> Thanks!
> 
> 
> --- In kawai-teisco@yahoogroups.com, Antoine Deschênes <antdes45@> wrote:
> >
> > You can put the diode before or after the resistor, it doesn't matter,
> > but check the diode orientation. What you can do is to mount the
> > resistor and diode vertically by unsoldering one pin of the resistor,
> > putting one of the diode's pins in it's place, and twist both
> > remaining pins together. I think it's better to keep the resistor
> > soldered as it prevents the battery from being shorted, it will
> > probably reduce the circuit's consumption a little bit, and protect
> > the battery if the diode ever shorts for a reason or another.
> > 
> > I'll try to take a picture of what I've done in my SX240 this week.
> > 
> > -- Antoine Deschênes
> > 
> > 
> > 
> > 2009/5/11 waketek <djwaketek@>:
> > > Is there a place on the board to add the diode or do I just need to go R,D,Batt. I am just trying to clarify as I have been told several different things which are different, one person told me to remove a diode, another told me to remove a resister, now you are saying keep the Resister then add a diode between the Resister and the Battery? Correct?
> > >
> > >
> > > I appreciate the response!
> > >
> > > Jason
> > >
> > > --- In kawai-teisco@yahoogroups.com, Antoine Deschênes <antdes45@> wrote:
> > >>
> > >> In fact you need to add a diode to prevent current from going in the
> > >> lithium battery. (It's easy to place in series with the battery
> > >> resistor)
> > >>
> > >> -- Antoine Deschênes
> > >>
> > >>
> > >>
> > >> 2009/5/11 waketek <djwaketek@>:
> > >> > Does anyone have battery replacement procedure?? Can I replace this NiCad with a 3V Lithium? I have heard yes but also need to remove a diod so that the Lithium does not try and take a charge. I just picked up a SX 240 and it is perfect even the NiCad loooks ok but I do not want to leave it in there. The DX7 has some nice step by step pics for Battery replacement, I was hoping there was one for the SX240?
> > >> >
> > >> > Thanks!
> > >> >
> > >> > Jason
> > >> >
> > >> >
> > >> >
> > >> > ------------------------------------
> > >> >
> > >> > Yahoo! Groups Links
> > >> >
> > >> >
> > >> >
> > >> >
> > >>
> > >
> > >
> > >
> > >
> > > ------------------------------------
> > >
> > > Yahoo! Groups Links
> > >
> > >
> > >
> > >
> >
>