Korg Poly800/EX800 Users

Hi Jason,
 
If those solder pads look clean, with no traces of old solder, then you
probably have one of the "in between" models which had solder pads added to
the KLM-596 in preparation for a lithium cell, but never actually had a
battery installed. Very early versions of the KLM-596 had no solder pads and
no battery. The only way to keep patches was to keep 6 "C" cells in the
battery compartment. The next version had solder pads but no battery, and
still had the memory connected to the C cells via R1 and D1 (5v Zener
diode). The last version had solder pads and a lithium cell soldered in, and
R1 and D1 were removed from the board.
 
Here are some examples I've seen:
S/N 011912 KLM-596-2 - had no solder pads and no battery.
S/N 041368 KLM-596-7 - had solder pads but no battery. R1 and D1 are still
on the board.
S/N 073712 KLM-596-8 - had solder pads and a battery. No R1 or D1 exist on
the board.
 
I don't know how many versions of the 596 board made it into production, and
I wish I had a list of what serial numbers had what board, but that's all
the info I have so far.
 
R1 and D1 are over in the corner by CN9A where the A/C adapter plugs in. The
pads are between IC18, IC19,  the (+) terminal is the one closest to IC20
(toward the back where all the switches and jacks are) and the (-) terminal
is closest to IC17 and the front edge of the board. In any case, R1 and D1
need to be removed if they exist, before you add a battery (or better yet, a
battery holder).
 
Don B.

  _____  

From: korgpolyex@yahoogroups.com [mailto:korgpolyex@yahoogroups.com] On
Behalf Of ackolonges
Sent: Friday, July 15, 2011 3:47 AM
To: korgpolyex@yahoogroups.com
Subject: [korgpolyex] battery


  

Hi, 

I got a hold of a poly-800 recently, and it doesn't hold patches so I
figured the battery had run out. When I opened it up I found that the place
where the various tutorials say the battery should be is just empty, with 2
empty square pads sitting there. 

Not sure why this is... I mean, who would desolder the battery out and not
replace it?

Anyway, I'd like to solder a new battery in (I'm not so worried about
getting a battery holder), but I'm not sure which pad is + or - , and how is
the best way to solder it on (or do I *need* a holder?) 

any info would be appreciated, cheers guys

Jason