Korg Poly800/EX800 Users

hi, me again

which of those two soldering islands is to be connected to + of the
battery?

christian

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

 

Thanks a lot for your reply Don,

I've taken out R1 and D1, and soldered in a battery. Everything works great :)

I've also added the cutoff/res and FM800 knobs which are very useful.

Now just contemplating whether I should go the whole hog and order the extra Hawk boards... hard to legitimize as the kits alone cost double what I paid for the synth to start with...

Anyway, thanks again for the info - I appreciate it.

Jason

--- In korgpolyex@yahoogroups.com, "backshall1 \(dsl\)" <backshall1@...> wrote:
>
> 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
>