Korg Poly800/EX800 Users

Okay, that means you should remove R1, D1 which are over near the 9v input
jack. Otherwise, there will be +5V feeding through to the CR2032, which
would attempt to charge the 3V battery up to 5V and could cause it to
overheat. It's hard to tell from the diagram, but this may only be a problem
if you also have the C-Cells installed.

 

Don B.

 

  _____  

From: korgpolyex@yahoogroups.com [mailto:korgpolyex@yahoogroups.com] On
Behalf Of eric justin
Sent: Sunday, December 16, 2012 11:48 AM
To: korgpolyex@yahoogroups.com
Subject: [korgpolyex] Re: MKI Battery Mod question.

 

  



--- In korgpolyex@yahoogroups.com <mailto:korgpolyex%40yahoogroups.com> ,
"backshall1" <backshall1@...> wrote:
>

Hey Don
I guess Its the early version because there was no battery just the two
soldier pads. I didn't remove anything, just hooked up a battery holder with
a CD2032 to the + and - pads.

Eric
> I guess that depends on what you DID do, and which of the three versions
of
> MK1 you have. Leaving C87, C88, D23 allows the Poly-800 memory to run off
in
> internal 5V supply while the synth is turned on, instead of the memory
> constantly using the Lithium cell whether the synth is on or off. Is D15
> still in the circuit? Did it already have a CR2032? Did you remove R1 and
> D1? Did this synth have the solder pads where the battery would eventually
> go, or is it a really early version without these pads?
> 
> 
> 
> Don B.
> 
> 
> 
> _____ 
> 
> From: korgpolyex@yahoogroups.com <mailto:korgpolyex%40yahoogroups.com>
[mailto:korgpolyex@yahoogroups.com <mailto:korgpolyex%40yahoogroups.com> ]
On
> Behalf Of eric justin
> Sent: Sunday, December 16, 2012 11:05 AM
> To: korgpolyex@yahoogroups.com <mailto:korgpolyex%40yahoogroups.com> 
> Subject: [korgpolyex] MKI Battery Mod question.
> 
> 
> 
> 
> 
> I just bought a second Poly 800 MKI and I'm in the process of doing all of
> the standard mods. I was about to do the battery mod so I looked up the
> instructions online to refresh my memory. After doing this, I realized
that
> I didn't do the mod correctly on my other Poly 800 though it is working
just
> fine. What I didn't do is remove C87, C88, D23 and cut the traces. Why do
> you have to remove these parts? I left them intact and the battery mod
works
> fine?
>