Yes, that is correct. You can still power the Poly-800 from C-cells, but the connection from those batteries to the memory chip is gone when you turn the synth off. When the synth is on, the memory chip will still get +5v power through D23 so you aren’t using the lithium cell while you are playing.
Don B
From:
korgpolyex@yahoogroups.com [mailto:
korgpolyex@yahoogroups.com ] On Behalf Of AARON
Sent: Wednesday, November 14, 2012
5:22 PM
To: korgpolyex@yahoogroups.com
Subject: [korgpolyex] Re: memory
backup battery mod
Hi all,
I hate to dredge up an old thread, but I'm considering doing the battery mod on my Poly-800 Mk I, too.
Just to be clear, if my synth DOES have the large solder "islands" in the middle of the board (which I believe it does), I do the following: (1) remove R1 completely; (2) remove D1 completely; and (3) solder the battery into the "islands" in the middle of the board; (4) remove the old C-cells and be a happy camper until the lithium battery dies.
Is that correct? If so, I'm headed to Radio Shack to get that CR2032 and holder!
Thanks!
Aaron
--- In
korgpolyex@yahoogroups.com , Michael Hawkins
<korgpolyex800@...> wrote:
>
between R1 and D1 and the negative side should be soldered to the other side of
the diode D1.
> Hi Vic,
>
> The positive side of the button battery should be soldered to the junction
>
resistor off leaving enough length on the legs to solder the battery wires onto
them. But I think it is much better to take the main board out and remove the
components completely and then solder the wires in to the vacated hole
locations.
> The mod document is trying to say that you can just clip the diode and
>
convert the battery mod text file into a much better PDF version with photos
etc.
> If you could do me a favor and send me photos (again - sorry), I will
>
the area where the battery ought to be. This will help other Poly owners to
identify the missing battery area (I'll do a side by side comparison shot of
battery missing and battery in place).
> So send me a photo showing the main board number KLM-596-2 and including
>
R1. I'll use them to improve the button battery addition instructions.
> And also send me a close up of the power regulation area including D1 and
>
Poly800 mk1 that I'd like to add the battery backup mod. I looked through the
files here and found the mod text, but after having looked over the schematics
I came across something I don't understand.
> Mike.
>
>
>
>
> ________________________________
> From: synther2000r synther2000r@...
> To: korgpolyex@yahoogroups.com
> Sent: Tuesday, June 9, 2009 10:05:26 PM
> Subject: [korgpolyex] memory backup battery mod
>
>
>
>
>
> Hello everyone.
>
> I hope y'all don't mind if I begin my first post with a question. I have a
>
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.). 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."
> In the text the instructions read "In the upper left corner you'll
>
is the + voltage of the battery going?
> I may be missing something but since R1 is no longer on the board, where
>
I'd just like to be certain that I have the instructions correct before doing
any cutting/soldering.
> Just to be clear, I haven't opened my Poly 800 up yet to check the traces.
>
> Thanks in advance.
>
> Vic
>