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Message

Re: Question regarding backup battery mod.

2008-03-01 by funkymonkeypeter

This is my second Poly-800.  The first had a problem with the
headphone amp and DC-in jack.  This one works great and I don't want
to muck it up.

If some one can answer my question I promise not to tell anyone what
really happened on 9/11.

So, to cut or not to cut?


--- In korgpolyex@yahoogroups.com, "funkymonkeypeter"
<funkymonkey3.14@...> wrote:
>
> Regarding the instructions here:
> 
> http://analog.no/mods/korg_poly-800_mk-1_battery_backup.htm
> 
> 
>     *  Open the Poly-800 by removing all screws at the bottom. Locate
> the processor board. This is the large circuit board next to the
> battery compartment.
>     * In the upper left corner you'll find Resistor R1 and Diode D1.
> Remove these. (Just cut the legs, but leave as much as possible of the
> D1 legs, see next steps.)
>     * If you have a late revision MK-1 there will be two fairly large
> solder "islands" in the center of the board. The battery is mounted
> here. The "island" to the front of the keyboard is ground.
>     * If you have an early revision you wont find this. The battery
> must then be connected by wires, the plus to the junction between
> R1/D1 and the minus to the other leg of D1.
>     * Any 3V lithium with solder lugs can be used as long as it is not
> to big physically for mounting to the board. A wristwatch type (2025,
> 2032) is fine.
> 
> 
> 
> I have the model with the solder islands, do i need to cut the legs to
> R1 and D1?  Or can I just solder to the islands and leave everything
> else intact? 
> 
> Thank you.
>

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