Synth-DIY Yahoo! Groups Archives

memory backup battery mod

2009-06-10 by synther2000r

Hello everyone.

I hope y'all don't mind if I begin my first post with a question. I have a 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.

In the text the instructions read "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.). 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."

I may be missing something but since R1 is no longer on the board, where is the + voltage of the battery going?

Just to be clear, I haven't opened my Poly 800 up yet to check the traces. I'd just like to be certain that I have the instructions correct before doing any cutting/soldering.

Thanks in advance.

Vic

Re: [korgpolyex] memory backup battery mod

2009-06-10 by Michael Hawkins

Hi Vic,

The positive side of the button battery should be soldered to the junction between R1 and D1 and the negative side should be soldered to the other side of the diode D1.

The mod document is trying to say that you can just clip the diode and 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.

If you could do me a favor and send me photos (again - sorry), I will convert the battery mod text file into a much better PDF version with photos etc.

So send me a photo showing the main board number KLM-596-2 and including 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).

And also send me a close up of the power regulation area including D1 and R1. I'll use them to improve the button battery addition instructions.

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 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.

In the text the instructions read "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.). 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."

I may be missing something but since R1 is no longer on the board, where is the + voltage of the battery going?

Just to be clear, I haven't opened my Poly 800 up yet to check the traces. I'd just like to be certain that I have the instructions correct before doing any cutting/soldering.

Thanks in advance.

Vic

Re: memory backup battery mod

2012-11-14 by AARON

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:
>
> Hi Vic,
>
> The positive side of the button battery should be soldered to the junction between R1 and D1 and the negative side should be soldered to the other side of the diode D1.
>
> The mod document is trying to say that you can just clip the diode and 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.
>
> If you could do me a favor and send me photos (again - sorry), I will convert the battery mod text file into a much better PDF version with photos etc.
>
> So send me a photo showing the main board number KLM-596-2 and including 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).
>
> And also send me a close up of the power regulation area including D1 and R1. I'll use them to improve the button battery addition instructions.
>
> 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 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.
>
> In the text the instructions read "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.). 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."
>
> I may be missing something but since R1 is no longer on the board, where is the + voltage of the battery going?
>
> Just to be clear, I haven't opened my Poly 800 up yet to check the traces. I'd just like to be certain that I have the instructions correct before doing any cutting/soldering.
>
> Thanks in advance.
>
> Vic
>

RE: [korgpolyex] Re: memory backup battery mod

2012-11-15 by backshall1

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:

>
> Hi Vic,
>
> The positive side of the button battery should be soldered to the junction

between R1 and D1 and the negative side should be soldered to the other side of the diode D1.

>
> The mod document is trying to say that you can just clip the diode and

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.

>
> If you could do me a favor and send me photos (again - sorry), I will

convert the battery mod text file into a much better PDF version with photos etc.

>
> So send me a photo showing the main board number KLM-596-2 and including

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).

>
> And also send me a close up of the power regulation area including D1 and

R1. I'll use them to improve the button battery addition instructions.

>
> 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

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.

>
> In the text the instructions read "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.). 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."

>
> I may be missing something but since R1 is no longer on the board, where

is the + voltage of the battery going?

>
> Just to be clear, I haven't opened my Poly 800 up yet to check the traces.

I'd just like to be certain that I have the instructions correct before doing any cutting/soldering.

>
> Thanks in advance.
>
> Vic
>

Re: memory backup battery mod

2012-11-15 by AARON

Well, everything seems to have worked out with the battery mod. The only issue was that the solder pins on the standard battery holder that you buy at Radio Shack don't line up exactly with the pads on the Poly's PCB.

So I attached wires to the pins and then soldered the wires to the PCB. As a result -- and I think this is a good thing -- the battery holder sits up a bit higher, which allows it to clear the adjacent components. If it sat flat against the PCB, it might be a tad too big for the relatively small space allowed. But having a battery holder is essential. Who wants to solder a new one in every time it goes dead, right?

I took pictures of my handiwork and posted them in an album called "Aaron's Poly 800 Mods." Enjoy!

Aaron

--- In korgpolyex@yahoogroups.com, "backshall1" <backshall1@...> wrote:
>
> 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! :) <http://us.i1.yimg.com/us.yimg.com/i/mesg/tsmileys2/01.gif>
>
> Thanks!
>
> Aaron
>
> --- In korgpolyex@yahoogroups.com, Michael Hawkins <korgpolyex800@>
> wrote:
> >
> > Hi Vic,
> >
> > The positive side of the button battery should be soldered to the junction
> between R1 and D1 and the negative side should be soldered to the other side
> of the diode D1.
> >
> > The mod document is trying to say that you can just clip the diode and
> 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.
> >
> > If you could do me a favor and send me photos (again - sorry), I will
> convert the battery mod text file into a much better PDF version with photos
> etc.
> >
> > So send me a photo showing the main board number KLM-596-2 and including
> 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).
> >
> > And also send me a close up of the power regulation area including D1 and
> R1. I'll use them to improve the button battery addition instructions.
> >
> > 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
> 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.
> >
> > In the text the instructions read "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.). 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."
> >
> > I may be missing something but since R1 is no longer on the board, where
> is the + voltage of the battery going?
> >
> > Just to be clear, I haven't opened my Poly 800 up yet to check the traces.
> I'd just like to be certain that I have the instructions correct before
> doing any cutting/soldering.
> >
> > Thanks in advance.
> >
> > Vic
> >
>

Re: [korgpolyex] Re: memory backup battery mod

2012-11-15 by Gordon JC Pearce

On 15/11/12 03:30, AARON wrote:

> big for the relatively small space allowed. But having a battery
> holder is essential. Who wants to solder a new one in every time it
> goes dead, right?

Why not just stick in a NiMH and forget about it forever?

--
Gordonjcp MM0YEQ

Re: memory backup battery mod

2012-11-15 by AARON

But isn't that the type of battery that leaked all over my Poly-61 PCB and made it stop working?

Besides, don't you need a charging circuit for that to work? Does the Poly 800 have such a circuit?

Aaron

--- In korgpolyex@yahoogroups.com, Gordon JC Pearce <gordon@...> wrote:
>
> On 15/11/12 03:30, AARON wrote:
>
> > big for the relatively small space allowed. But having a battery
> > holder is essential. Who wants to solder a new one in every time it
> > goes dead, right?
>
> Why not just stick in a NiMH and forget about it forever?
>
> --
> Gordonjcp MM0YEQ
>

Re: [korgpolyex] Re: memory backup battery mod

2012-11-15 by Gordon JC Pearce

On 15/11/12 19:00, AARON wrote:

>
>
> But isn't that the type of battery that leaked all over my Poly-61 PCB
> and made it stop working? :)

They're NiCads, and very different construction.

> Besides, don't you need a charging circuit for that to work? Does the
> Poly 800 have such a circuit?

That's what the resistor and diode you remove are. It's a crap charging
circuit, but it pretty much works.

--
Gordonjcp

RE: [korgpolyex] Re: memory backup battery mod

2012-11-16 by backshall1

I haven’t been too thrilled with NiMH battery longevity lately. I just replaced one in a cordless phone and a couple in my kids remote control cars that had stopped charging. They aren’t cheap and they don’t last forever. I would stick with a CR2032 in a coin cell socket.

Don B.

From: korgpolyex@yahoogroups.com [mailto: korgpolyex@yahoogroups.com ] On Behalf Of Gordon JC Pearce
Sent: Thursday, November 15, 2012 5:06 PM
To: korgpolyex@yahoogroups.com
Subject: Re: [korgpolyex] Re: memory backup battery mod

On 15/11/12 19:00, AARON wrote:

>
>
> But isn't that the type of battery that leaked all over my Poly-61 PCB
> and made it stop working? :)

They're NiCads, and very different construction.

> Besides, don't you need a charging circuit for that to work? Does the
> Poly 800 have such a circuit?

That's what the resistor and diode you remove are. It's a crap charging
circuit, but it pretty much works.

--
Gordonjcp

Re: memory backup battery mod

2012-11-16 by AARON

Yep. They work, they're cheap, and they're easy to find when it comes time to replace them. Besides, I'll probably be selling this machine anyway, so it isn't necessary for me to ensure that the battery lasts forever.

Aaron

--- In korgpolyex@yahoogroups.com, "backshall1" <backshall1@...> wrote:
>I would stick with a CR2032 in a coin cell socket.
>
> Don B.
_____
>
> From: korgpolyex@yahoogroups.com [mailto:korgpolyex@yahoogroups.com] On
> Behalf Of Gordon JC Pearce
> Sent: Thursday, November 15, 2012 5:06 PM
> To: korgpolyex@yahoogroups.com
> Subject: Re: [korgpolyex] Re: memory backup battery mod
>
>
>
>
>
> On 15/11/12 19:00, AARON wrote:
> >
> >
> > But isn't that the type of battery that leaked all over my Poly-61 PCB
> > and made it stop working? :)
>
> They're NiCads, and very different construction.
>
> > Besides, don't you need a charging circuit for that to work? Does the
> > Poly 800 have such a circuit?
>
> That's what the resistor and diode you remove are. It's a crap charging
> circuit, but it pretty much works.
>
> --
> Gordonjcp
>

RE: [korgpolyex] Re: memory backup battery mod

2012-11-17 by backshall1

I haven’t ever used extra wire with Radio Shack type battery holders. They just need a couple of small modifications. The goal is to get the battery holder to sit flat on top of the two chips on either side. The metal contact pins on the holder are a bit too close together but they are also a bit long, so just bend them out until they reach the solder pads. There are also three little plastic “leg” pins on the bottom of the holder. You need to cut one of them off to get the holder to sit flat.

Once you have it so it looks like it will sit flat, fill each solder pad with solder, then coat the metal pins on the holder with solder, set it in place and reheat both solder pads. Done.

Don B.

From: korgpolyex@yahoogroups.com [mailto: korgpolyex@yahoogroups.com ] On Behalf Of AARON
Sent: Thursday, November 15, 2012 10:40 PM
To: korgpolyex@yahoogroups.com
Subject: [korgpolyex] Re: memory backup battery mod

Yep. They work, they're cheap, and they're easy to find when it comes time to replace them. Besides, I'll probably be selling this machine anyway, so it isn't necessary for me to ensure that the battery lasts forever.

Aaron

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

>I would stick with a CR2032 in a coin cell socket.
>
> Don B.

_____

>
> From: korgpolyex@yahoogroups.com

[mailto:korgpolyex@yahoogroups.com] On

> Behalf Of Gordon JC Pearce
> Sent: Thursday, November 15, 2012 5:06 PM
> To: korgpolyex@yahoogroups.com
> Subject: Re: [korgpolyex] Re: memory backup battery mod
>
>
>
>
>
> On 15/11/12 19:00, AARON wrote:
> >
> >
> > But isn't that the type of battery that leaked all over my Poly-61

PCB

> > and made it stop working? :)
>
> They're NiCads, and very different construction.
>
> > Besides, don't you need a charging circuit for that to work? Does the
> > Poly 800 have such a circuit?
>
> That's what the resistor and diode you remove are. It's a crap charging
> circuit, but it pretty much works.
>
> --
> Gordonjcp
>

Re: [korgpolyex] Re: memory backup battery mod

2012-11-17 by Jason Adkins

Will this be the same for my EX-800?

On 17 Nov 2012, at 02:06, backshall1 wrote:

I haven’t ever used extra wire with Radio Shack type battery holders. They just need a couple of small modifications. The goal is to get the battery holder to sit flat on top of the two chips on either side. The metal contact pins on the holder are a bit too close together but they are also a bit long, so just bend them out until they reach the solder pads. There are also three little plastic “leg” pins on the bottom of the holder. You need to cut one of them off to get the holder to sit flat.
Once you have it so it looks like it will sit flat, fill each solder pad with solder, then coat the metal pins on the holder with solder, set it in place and reheat both solder pads. Done.

Don B.

From: korgpolyex@yahoogroups.com [mailto:korgpolyex@yahoogroups.com ] On Behalf Of AARON
Sent: Thursday, November 15, 2012 10:40 PM
To: korgpolyex@yahoogroups.com
Subject: [korgpolyex] Re: memory backup battery mod

Yep. They work, they're cheap, and they're easy to find when it comes time to replace them. Besides, I'll probably be selling this machine anyway, so it isn't necessary for me to ensure that the battery lasts forever.

Aaron

--- In korgpolyex@yahoogroups.com, "backshall1" <backshall1@...> wrote:
>I would stick with a CR2032 in a coin cell socket.
>
> Don B.
_____
>
> From: korgpolyex@yahoogroups.com [mailto:korgpolyex@yahoogroups.com] On
> Behalf Of Gordon JC Pearce
> Sent: Thursday, November 15, 2012 5:06 PM
> To: korgpolyex@yahoogroups.com
> Subject: Re: [korgpolyex] Re: memory backup battery mod
>
>
>
>
>
> On 15/11/12 19:00, AARON wrote:
> >
> >
> > But isn't that the type of battery that leaked all over my Poly-61 PCB
> > and made it stop working? :)
>
> They're NiCads, and very different construction.
>
> > Besides, don't you need a charging circuit for that to work? Does the
> > Poly 800 have such a circuit?
>
> That's what the resistor and diode you remove are. It's a crap charging
> circuit, but it pretty much works.
>
> --
> Gordonjcp
>

Re: memory backup battery mod

2012-11-18 by bimmerfan222

Yes.

The EX800 mainboard is the same as the one in a Poly 800.

If you get the HAWK800 upgrade, you wont need that battery at all since memory would be upgraded to FLASH memory.

--- In korgpolyex@yahoogroups.com, Jason Adkins <jason_ralf808@...> wrote:
>
> Will this be the same for my EX-800?
>
> On 17 Nov 2012, at 02:06, backshall1 wrote:
>

Re: memory backup battery mod

2012-11-25 by AARON

Don,

I followed your advice when I did the battery mod on my other Poly-800 and it worked perfectly. It looks slightly better than what I did with the other one, too.

Thanks!

Aaron

--- In korgpolyex@yahoogroups.com, "backshall1" <backshall1@...> wrote:
>
> I haven't ever used extra wire with Radio Shack type battery holders. They
> just need a couple of small modifications. The goal is to get the battery
> holder to sit flat on top of the two chips on either side. The metal contact
> pins on the holder are a bit too close together but they are also a bit
> long, so just bend them out until they reach the solder pads. There are also
> three little plastic "leg" pins on the bottom of the holder. You need to cut
> one of them off to get the holder to sit flat.
>
> Once you have it so it looks like it will sit flat, fill each solder pad
> with solder, then coat the metal pins on the holder with solder, set it in
> place and reheat both solder pads. Done.
>
>
>
> Don B.
>
>
>
> _____
>
> From: korgpolyex@yahoogroups.com [mailto:korgpolyex@yahoogroups.com] On
> Behalf Of AARON
> Sent: Thursday, November 15, 2012 10:40 PM
> To: korgpolyex@yahoogroups.com
> Subject: [korgpolyex] Re: memory backup battery mod
>
>
>
>
>
> Yep. They work, they're cheap, and they're easy to find when it comes time
> to replace them. Besides, I'll probably be selling this machine anyway, so
> it isn't necessary for me to ensure that the battery lasts forever.
>
> Aaron
>
> --- In korgpolyex@yahoogroups.com <mailto:korgpolyex%40yahoogroups.com> ,
> "backshall1" <backshall1@> wrote:
> >I would stick with a CR2032 in a coin cell socket.
> >
> > Don B.
> _____
> >
> > From: korgpolyex@yahoogroups.com <mailto:korgpolyex%40yahoogroups.com>
> [mailto:korgpolyex@yahoogroups.com <mailto:korgpolyex%40yahoogroups.com> ]
> On
> > Behalf Of Gordon JC Pearce
> > Sent: Thursday, November 15, 2012 5:06 PM
> > To: korgpolyex@yahoogroups.com <mailto:korgpolyex%40yahoogroups.com>
> > Subject: Re: [korgpolyex] Re: memory backup battery mod
> >
> >
> >
> >
> >
> > On 15/11/12 19:00, AARON wrote:
> > >
> > >
> > > But isn't that the type of battery that leaked all over my Poly-61 PCB
> > > and made it stop working? :)
> >
> > They're NiCads, and very different construction.
> >
> > > Besides, don't you need a charging circuit for that to work? Does the
> > > Poly 800 have such a circuit?
> >
> > That's what the resistor and diode you remove are. It's a crap charging
> > circuit, but it pretty much works.
> >
> > --
> > Gordonjcp
> >
>