The Kawai & Teisco Analog Synths Group

You can simply take off the original battery, then attach a coin cell
type lithium in a coin type battery holder (like the ones
motherboards have) using double sided adhesive tape, connect the
cathode (negative side) of the holder just to where the original
battery cathode goes, and the anode (positive side) to a diode
(positive side of the 1N4148 diode facing the positive side of the
battery). Negavite side of the diode goes to the 1.5K resistor,
originally connected to the battery.




--- In kawai_analog@yahoogroups.com, "Travis Shire" <boardjunkie@...> 
wrote:
>
> What I would do is solder in a lithium 3.6v "aa" sized battery with 
leads
> then connect a dvm in current mode in series with it (do not pwr 
the unit
> up). You can read the current draw from there and determine if
> something's drawing too much current. It should be just a few 
microamps.
> I don't have my 240 service manual here (moving, bah!) so I can't 
make
> other suggestions at this time. My 240 works just great with the
> lithium/diode arrangement.
> 
>   ----- Original Message -----
>   From: "sputnik979"
>   To: kawai_analog@yahoogroups.com
>   Subject: [kawai_analog] Re: SX-240 memory problem
>   Date: Tue, 01 Aug 2006 14:12:37 -0000
> 
>   Hi,
>   No, I didn't make any modifications.
>   The synth & circuits are in original condition.
>   30 days? What are you saying? Can't be.
>   The voltage should suffice for like couple of months...
>   I also used a panasonic phone cell for my Korg Poly61 and it works
>   fine.
>   I know that the voltage drops off when synth is unplugged, but 
come
>   on... here it's gone after 2 days! :(
> 
>   --- In kawai_analog@yahoogroups.com, "texhand" <texhand@> wrote:
>   >
>   > ---
>   > The battery if charged should last about 30 days for the 
original.
>   > Must be powered on to charge. If after charged your battery is
>   quickly
>   > discharged something is wrong. I used an equivelent radio shack
>   cell
>   > phone rechargable battery and it worked fine. If you modified 
yours
>   to
>   > take a different battery, that is over my expierence.(of course 
the
>   > charging voltage will drop once turned off)
> 
>   
> 
> -- 
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