Korg Poly800/EX800 Users

>
> Regarding the instructions here:
>
> http://analog.no/mods/korg_poly-800_mk-1_battery_backup.htm
>
>
> * Open the Poly-800 by removing all screws at the bottom. Locate
> the processor board. This is the large circuit board next to the
> battery compartment.
> * 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.)
> * If you have a late revision MK-1 there will be two fairly large
> solder "islands" in the center of the board. The battery is mounted
> here. The "island" to the front of the keyboard is ground.
> * If you have an early revision you wont find this. 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.
> * Any 3V lithium with solder lugs can be used as long as it is not
> to big physically for mounting to the board. A wristwatch type (2025,
> 2032) is fine.
>
>
>
> I have the model with the solder islands, do i need to cut the legs to
> R1 and D1? Or can I just solder to the islands and leave everything
> else intact?
>
> Thank you.
>

>
> This is my second Poly-800. The first had a problem with the
> headphone amp and DC-in jack. This one works great and I don't want
> to muck it up.
>
> If some one can answer my question I promise not to tell anyone what
> really happened on 9/11.
>
> So, to cut or not to cut?
>
>
> --- In korgpolyex@yahoogroups.com, "funkymonkeypeter"
> <funkymonkey3.14@> wrote:
> >
> > Regarding the instructions here:
> >
> > http://analog.no/mods/korg_poly-800_mk-1_battery_backup.htm
> >
> >
> > * Open the Poly-800 by removing all screws at the bottom. Locate
> > the processor board. This is the large circuit board next to the
> > battery compartment.
> > * 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.)
> > * If you have a late revision MK-1 there will be two fairly large
> > solder "islands" in the center of the board. The battery is mounted
> > here. The "island" to the front of the keyboard is ground.
> > * If you have an early revision you wont find this. 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.
> > * Any 3V lithium with solder lugs can be used as long as it is not
> > to big physically for mounting to the board. A wristwatch type (2025,
> > 2032) is fine.
> >
> >
> >
> > I have the model with the solder islands, do i need to cut the legs to
> > R1 and D1? Or can I just solder to the islands and leave everything
> > else intact?
> >
> > Thank you.
> >
>

>
> Since you say your board has the square solder islands then I'll be
> very surprised if your board actually has an R1 and D1 at all.
>
> Are you able to find them? If you are, where are they?
>
> Mike.
>
>
> --- In korgpolyex@yahoogroups.com, "funkymonkeypeter"
> <funkymonkey3.14@> wrote:
> >
> > This is my second Poly-800. The first had a problem with the
> > headphone amp and DC-in jack. This one works great and I don't want
> > to muck it up.
> >
> > If some one can answer my question I promise not to tell anyone what
> > really happened on 9/11.
> >
> > So, to cut or not to cut?
> >
> >
> > --- In korgpolyex@yahoogroups.com, "funkymonkeypeter"
> > <funkymonkey3.14@> wrote:
> > >
> > > Regarding the instructions here:
> > >
> > > http://analog.no/mods/korg_poly-800_mk-1_battery_backup.htm
> > >
> > >
> > > * Open the Poly-800 by removing all screws at the bottom.

> > > the processor board. This is the large circuit board next to the
> > > battery compartment.
> > > * 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

> > > D1 legs, see next steps.)
> > > * If you have a late revision MK-1 there will be two fairly

> > > solder "islands" in the center of the board. The battery is mounted
> > > here. The "island" to the front of the keyboard is ground.
> > > * If you have an early revision you wont find this. 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.
> > > * Any 3V lithium with solder lugs can be used as long as it

> > > to big physically for mounting to the board. A wristwatch type

> > > 2032) is fine.
> > >
> > >
> > >
> > > I have the model with the solder islands, do i need to cut the

> > > R1 and D1? Or can I just solder to the islands and leave everything
> > > else intact?
> > >
> > > Thank you.
> > >
> >
>

>
> Yes, both R1 and D1 are present (right by CN9A (C-Cell battery
> compartment connector to board)).
>
> Thank you.
>
>
>
> --- In korgpolyex@yahoogroups.com, "korgpolyex800" <korgpolyex800@>
> wrote:
> >
> > Since you say your board has the square solder islands then I'll be
> > very surprised if your board actually has an R1 and D1 at all.
> >
> > Are you able to find them? If you are, where are they?
> >
> > Mike.
> >
> >
> > --- In korgpolyex@yahoogroups.com, "funkymonkeypeter"
> > <funkymonkey3.14@> wrote:
> > >
> > > This is my second Poly-800. The first had a problem with the
> > > headphone amp and DC-in jack. This one works great and I don't want
> > > to muck it up.
> > >
> > > If some one can answer my question I promise not to tell anyone what
> > > really happened on 9/11.
> > >
> > > So, to cut or not to cut?
> > >
> > >
> > > --- In korgpolyex@yahoogroups.com, "funkymonkeypeter"
> > > <funkymonkey3.14@> wrote:
> > > >
> > > > Regarding the instructions here:
> > > >
> > > > http://analog.no/mods/korg_poly-800_mk-1_battery_backup.htm
> > > >
> > > >
> > > > * Open the Poly-800 by removing all screws at the bottom.
> Locate
> > > > the processor board. This is the large circuit board next to the
> > > > battery compartment.
> > > > * In the upper left corner you'll find Resistor R1 and

> > > > Remove these. (Just cut the legs, but leave as much as possible
> of the
> > > > D1 legs, see next steps.)
> > > > * If you have a late revision MK-1 there will be two fairly
> large
> > > > solder "islands" in the center of the board. The battery is

> > > > here. The "island" to the front of the keyboard is ground.
> > > > * If you have an early revision you wont find this. The

> > > > must then be connected by wires, the plus to the junction between
> > > > R1/D1 and the minus to the other leg of D1.
> > > > * Any 3V lithium with solder lugs can be used as long as it
> is not
> > > > to big physically for mounting to the board. A wristwatch type
> (2025,
> > > > 2032) is fine.
> > > >
> > > >
> > > >
> > > > I have the model with the solder islands, do i need to cut the
> legs to
> > > > R1 and D1? Or can I just solder to the islands and leave

> > > > else intact?
> > > >
> > > > Thank you.
> > > >
> > >
> >
>

>
> Hmm, where are the square solder pads for the battery backup found?
> What components are close to those solder pads?
>
> Mike.
>
> --- In korgpolyex@yahoogroups.com, "funkymonkeypeter"
> <funkymonkey3.14@> wrote:
> >
> > Yes, both R1 and D1 are present (right by CN9A (C-Cell battery
> > compartment connector to board)).
> >
> > Thank you.
> >
> >
> >
> > --- In korgpolyex@yahoogroups.com, "korgpolyex800" <korgpolyex800@>
> > wrote:
> > >
> > > Since you say your board has the square solder islands then I'll be
> > > very surprised if your board actually has an R1 and D1 at all.
> > >
> > > Are you able to find them? If you are, where are they?
> > >
> > > Mike.
> > >
> > >
> > > --- In korgpolyex@yahoogroups.com, "funkymonkeypeter"
> > > <funkymonkey3.14@> wrote:
> > > >
> > > > This is my second Poly-800. The first had a problem with the
> > > > headphone amp and DC-in jack. This one works great and I

> > > > to muck it up.
> > > >
> > > > If some one can answer my question I promise not to tell

> > > > really happened on 9/11.
> > > >
> > > > So, to cut or not to cut?
> > > >
> > > >
> > > > --- In korgpolyex@yahoogroups.com, "funkymonkeypeter"
> > > > <funkymonkey3.14@> wrote:
> > > > >
> > > > > Regarding the instructions here:
> > > > >
> > > > > http://analog.no/mods/korg_poly-800_mk-1_battery_backup.htm
> > > > >
> > > > >
> > > > > * Open the Poly-800 by removing all screws at the bottom.
> > Locate
> > > > > the processor board. This is the large circuit board next to the
> > > > > battery compartment.
> > > > > * 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.)
> > > > > * If you have a late revision MK-1 there will be two fairly
> > large
> > > > > solder "islands" in the center of the board. The battery is
> mounted
> > > > > here. The "island" to the front of the keyboard is ground.
> > > > > * If you have an early revision you wont find this. The
> battery
> > > > > must then be connected by wires, the plus to the junction

> > > > > R1/D1 and the minus to the other leg of D1.
> > > > > * Any 3V lithium with solder lugs can be used as long as it
> > is not
> > > > > to big physically for mounting to the board. A wristwatch type
> > (2025,
> > > > > 2032) is fine.
> > > > >
> > > > >
> > > > >
> > > > > I have the model with the solder islands, do i need to cut the
> > legs to
> > > > > R1 and D1? Or can I just solder to the islands and leave
> everything
> > > > > else intact?
> > > > >
> > > > > Thank you.
> > > > >
> > > >
> > >
> >
>

>
> The square solder pads are in the middle of the main board between
> IC18 and IC19
>
> Thanks.
>
>
> --- In korgpolyex@yahoogroups.com, "korgpolyex800" <korgpolyex800@>
> wrote:
> >
> > Hmm, where are the square solder pads for the battery backup found?
> > What components are close to those solder pads?
> >
> > Mike.
> >
> > --- In korgpolyex@yahoogroups.com, "funkymonkeypeter"
> > <funkymonkey3.14@> wrote:
> > >
> > > Yes, both R1 and D1 are present (right by CN9A (C-Cell battery
> > > compartment connector to board)).
> > >
> > > Thank you.
> > >
> > >
> > >
> > > --- In korgpolyex@yahoogroups.com, "korgpolyex800" <korgpolyex800@>
> > > wrote:
> > > >
> > > > Since you say your board has the square solder islands then

> > > > very surprised if your board actually has an R1 and D1 at all.
> > > >
> > > > Are you able to find them? If you are, where are they?
> > > >
> > > > Mike.
> > > >
> > > >
> > > > --- In korgpolyex@yahoogroups.com, "funkymonkeypeter"
> > > > <funkymonkey3.14@> wrote:
> > > > >
> > > > > This is my second Poly-800. The first had a problem with the
> > > > > headphone amp and DC-in jack. This one works great and I
> don't want
> > > > > to muck it up.
> > > > >
> > > > > If some one can answer my question I promise not to tell
> anyone what
> > > > > really happened on 9/11.
> > > > >
> > > > > So, to cut or not to cut?
> > > > >
> > > > >
> > > > > --- In korgpolyex@yahoogroups.com, "funkymonkeypeter"
> > > > > <funkymonkey3.14@> wrote:
> > > > > >
> > > > > > Regarding the instructions here:
> > > > > >
> > > > > > http://analog.no/mods/korg_poly-800_mk-1_battery_backup.htm
> > > > > >
> > > > > >
> > > > > > * Open the Poly-800 by removing all screws at the bottom.
> > > Locate
> > > > > > the processor board. This is the large circuit board next

> > > > > > battery compartment.
> > > > > > * In the upper left corner you'll find Resistor R1 and
> > Diode D1.
> > > > > > Remove these. (Just cut the legs, but leave as much as

> > > of the
> > > > > > D1 legs, see next steps.)
> > > > > > * If you have a late revision MK-1 there will be two

> > > large
> > > > > > solder "islands" in the center of the board. The battery is
> > mounted
> > > > > > here. The "island" to the front of the keyboard is ground.
> > > > > > * If you have an early revision you wont find this. 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.
> > > > > > * Any 3V lithium with solder lugs can be used as long

> > > is not
> > > > > > to big physically for mounting to the board. A wristwatch type
> > > (2025,
> > > > > > 2032) is fine.
> > > > > >
> > > > > >
> > > > > >
> > > > > > I have the model with the solder islands, do i need to cut the
> > > legs to
> > > > > > R1 and D1? Or can I just solder to the islands and leave
> > everything
> > > > > > else intact?
> > > > > >
> > > > > > Thank you.
> > > > > >
> > > > >
> > > >
> > >
> >
>

>
> What version of the KLM-596 board is in your synth?
>
> KLM-596-?
>
> Mike.
>
> --- In korgpolyex@yahoogroups.com, "funkymonkeypeter"
> <funkymonkey3.14@> wrote:
> >
> > The square solder pads are in the middle of the main board between
> > IC18 and IC19
> >
> > Thanks.
> >
> >
> > --- In korgpolyex@yahoogroups.com, "korgpolyex800" <korgpolyex800@>
> > wrote:
> > >
> > > Hmm, where are the square solder pads for the battery backup found?
> > > What components are close to those solder pads?
> > >
> > > Mike.
> > >
> > > --- In korgpolyex@yahoogroups.com, "funkymonkeypeter"
> > > <funkymonkey3.14@> wrote:
> > > >
> > > > Yes, both R1 and D1 are present (right by CN9A (C-Cell battery
> > > > compartment connector to board)).
> > > >
> > > > Thank you.
> > > >
> > > >
> > > >
> > > > --- In korgpolyex@yahoogroups.com, "korgpolyex800"

> > > > wrote:
> > > > >
> > > > > Since you say your board has the square solder islands then
> I'll be
> > > > > very surprised if your board actually has an R1 and D1 at all.
> > > > >
> > > > > Are you able to find them? If you are, where are they?
> > > > >
> > > > > Mike.
> > > > >
> > > > >
> > > > > --- In korgpolyex@yahoogroups.com, "funkymonkeypeter"
> > > > > <funkymonkey3.14@> wrote:
> > > > > >
> > > > > > This is my second Poly-800. The first had a problem with the
> > > > > > headphone amp and DC-in jack. This one works great and I
> > don't want
> > > > > > to muck it up.
> > > > > >
> > > > > > If some one can answer my question I promise not to tell
> > anyone what
> > > > > > really happened on 9/11.
> > > > > >
> > > > > > So, to cut or not to cut?
> > > > > >
> > > > > >
> > > > > > --- In korgpolyex@yahoogroups.com, "funkymonkeypeter"
> > > > > > <funkymonkey3.14@> wrote:
> > > > > > >
> > > > > > > Regarding the instructions here:
> > > > > > >
> > > > > > > http://analog.no/mods/korg_poly-800_mk-1_battery_backup.htm
> > > > > > >
> > > > > > >
> > > > > > > * Open the Poly-800 by removing all screws at the

> > > > Locate
> > > > > > > the processor board. This is the large circuit board next
> to the
> > > > > > > battery compartment.
> > > > > > > * 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.)
> > > > > > > * If you have a late revision MK-1 there will be two
> fairly
> > > > large
> > > > > > > solder "islands" in the center of the board. The battery is
> > > mounted
> > > > > > > here. The "island" to the front of the keyboard is ground.
> > > > > > > * If you have an early revision you wont find this. 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.
> > > > > > > * Any 3V lithium with solder lugs can be used as long
> as it
> > > > is not
> > > > > > > to big physically for mounting to the board. A

> > > > (2025,
> > > > > > > 2032) is fine.
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > I have the model with the solder islands, do i need to

> > > > legs to
> > > > > > > R1 and D1? Or can I just solder to the islands and leave
> > > everything
> > > > > > > else intact?
> > > > > > >
> > > > > > > Thank you.
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>

To: korgpolyex@yahoogroups.com
From: JB@...
Date: Mon, 3 Mar 2008 04:42:52 +0900
Subject: Re: [korgpolyex] Re: Question regarding backup battery mod.

Hi there!

when you mention the headphone amp gone bad, I had that issue with one of my polys, and I managed to jury rig a repair, that has worked well

do you still have the first poly? and are you interested in a how to to fix the headphone amp? (im assuming that the L/R 1/4" trs connectors still output line level fine)

best regards,

Marcus Wilson

On 02/03/2008, at 3:08 AM, funkymonkeypeter wrote:

This is my second Poly-800. The first had a problem with the
headphone amp and DC-in jack. This one works great and I don't want
to muck it up.

If some one can answer my question I promise not to tell anyone what
really happened on 9/11.

So, to cut or not to cut?

--- In korgpolyex@yahoogroups.com, "funkymonkeypeter"
<funkymonkey3.14@...> wrote:
>
> Regarding the instructions here:
>
> http://analog.no/mods/korg_poly-800_mk-1_battery_backup.htm
>
>
> * Open the Poly-800 by removing all screws at the bottom. Locate
> the processor board. This is the large circuit board next to the
> battery compartment.
> * 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.)
> * If you have a late revision MK-1 there will be two fairly large
> solder "islands" in the center of the board. The battery is mounted
> here. The "island" to the front of the keyboard is ground.
> * If you have an early revision you wont find this. 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.
> * Any 3V lithium with solder lugs can be used as long as it is not
> to big physically for mounting to the board. A wristwatch type (2025,
> 2032) is fine.
>
>
>
> I have the model with the solder islands, do i need to cut the legs to
> R1 and D1? Or can I just solder to the islands and leave everything
> else intact?
>
> Thank you.
>

>
> Main board ID is KLM 596-4
>
>
>
>
> --- In korgpolyex@yahoogroups.com, "korgpolyex800" <korgpolyex800@>
> wrote:
> >
> > What version of the KLM-596 board is in your synth?
> >
> > KLM-596-?
> >
> > Mike.
> >
> > --- In korgpolyex@yahoogroups.com, "funkymonkeypeter"
> > <funkymonkey3.14@> wrote:
> > >
> > > The square solder pads are in the middle of the main board between
> > > IC18 and IC19
> > >
> > > Thanks.
> > >
> > >
> > > --- In korgpolyex@yahoogroups.com, "korgpolyex800" <korgpolyex800@>
> > > wrote:
> > > >
> > > > Hmm, where are the square solder pads for the battery backup

> > > > What components are close to those solder pads?
> > > >
> > > > Mike.
> > > >
> > > > --- In korgpolyex@yahoogroups.com, "funkymonkeypeter"
> > > > <funkymonkey3.14@> wrote:
> > > > >
> > > > > Yes, both R1 and D1 are present (right by CN9A (C-Cell battery
> > > > > compartment connector to board)).
> > > > >
> > > > > Thank you.
> > > > >
> > > > >
> > > > >
> > > > > --- In korgpolyex@yahoogroups.com, "korgpolyex800"
> <korgpolyex800@>
> > > > > wrote:
> > > > > >
> > > > > > Since you say your board has the square solder islands then
> > I'll be
> > > > > > very surprised if your board actually has an R1 and D1 at all.
> > > > > >
> > > > > > Are you able to find them? If you are, where are they?
> > > > > >
> > > > > > Mike.
> > > > > >
> > > > > >
> > > > > > --- In korgpolyex@yahoogroups.com, "funkymonkeypeter"
> > > > > > <funkymonkey3.14@> wrote:
> > > > > > >
> > > > > > > This is my second Poly-800. The first had a problem

> > > > > > > headphone amp and DC-in jack. This one works great and I
> > > don't want
> > > > > > > to muck it up.
> > > > > > >
> > > > > > > If some one can answer my question I promise not to tell
> > > anyone what
> > > > > > > really happened on 9/11.
> > > > > > >
> > > > > > > So, to cut or not to cut?
> > > > > > >
> > > > > > >
> > > > > > > --- In korgpolyex@yahoogroups.com, "funkymonkeypeter"
> > > > > > > <funkymonkey3.14@> wrote:
> > > > > > > >
> > > > > > > > Regarding the instructions here:
> > > > > > > >
> > > > > > > >

> > > > > > > >
> > > > > > > >
> > > > > > > > * Open the Poly-800 by removing all screws at the
> bottom.
> > > > > Locate
> > > > > > > > the processor board. This is the large circuit board next
> > to the
> > > > > > > > battery compartment.
> > > > > > > > * 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.)
> > > > > > > > * If you have a late revision MK-1 there will be two
> > fairly
> > > > > large
> > > > > > > > solder "islands" in the center of the board. The

> > > > mounted
> > > > > > > > here. The "island" to the front of the keyboard is ground.
> > > > > > > > * If you have an early revision you wont find

> > > > battery
> > > > > > > > must then be connected by wires, the plus to the junction
> > > between
> > > > > > > > R1/D1 and the minus to the other leg of D1.
> > > > > > > > * Any 3V lithium with solder lugs can be used as long
> > as it
> > > > > is not
> > > > > > > > to big physically for mounting to the board. A
> wristwatch type
> > > > > (2025,
> > > > > > > > 2032) is fine.
> > > > > > > >
> > > > > > > >
> > > > > > > >
> > > > > > > > I have the model with the solder islands, do i need to
> cut the
> > > > > legs to
> > > > > > > > R1 and D1? Or can I just solder to the islands and leave
> > > > everything
> > > > > > > > else intact?
> > > > > > > >
> > > > > > > > Thank you.
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>

To: korgpolyex@yahoogroups.com
From: korgpolyex800@...
Date: Sun, 2 Mar 2008 20:01:55 +0000
Subject: [korgpolyex] Re: Question regarding backup battery mod.

Yes, I can confirm that you must remove D1 and R1.

I've also been able to confirm that all versions of KLM-596 from
KLM-596-1 through KLM-596-7 include D1 and R1.

But on versions KLM-596-8 and up (I don't how many more rev's there
are) they do not have D1 and R1 installed at all. In fact, they don't
appear on the board at all.

Mike.

--- In korgpolyex@yahoogro ups.com, "funkymonkeypeter"
<funkymonkey3. 14@...> wrote:
>
> Main board ID is KLM 596-4
>
>
>
>
> --- In korgpolyex@yahoogro ups.com, "korgpolyex800" <korgpolyex800@ >
> wrote:
> >
> > What version of the KLM-596 board is in your synth?
> >
> > KLM-596-?
> >
> > Mike.
> >
> > --- In korgpolyex@yahoogro ups.com, "funkymonkeypeter"
> > <funkymonkey3. 14@> wrote:
> > >
> > > The square solder pads are in the middle of the main board between
> > > IC18 and IC19
> > >
> > > Thanks.
> > >
> > >
> > > --- In korgpolyex@yahoogro ups.com, "korgpolyex800" <korgpolyex800@ >
> > > wrote:
> > > >
> > > > Hmm, where are the square solder pads for the battery backup
found?
> > > > What components are close to those solder pads?
> > > >
> > > > Mike.
> > > >
> > > > --- In korgpolyex@yahoogro ups.com, "funkymonkeypeter"
> > > > <funkymonkey3. 14@> wrote:
> > > > >
> > > > > Yes, both R1 and D1 are present (right by CN9A (C-Cell battery
> > > > > compartment connector to board)).
> > > > >
> > > > > Thank you.
> > > > >
> > > > >
> > > > >
> > > > > --- In korgpolyex@yahoogro ups.com, "korgpolyex800"
> <korgpolyex800@ >
> > > > > wrote:
> > > > > >
> > > > > > Since you say your board has the square solder islands then
> > I'll be
> > > > > > very surprised if your board actually has an R1 and D1 at all.
> > > > > >
> > > > > > Are you able to find them? If you are, where are they?
> > > > > >
> > > > > > Mike.
> > > > > >
> > > > > >
> > > > > > --- In korgpolyex@yahoogro ups.com, "funkymonkeypeter"
> > > > > > <funkymonkey3. 14@> wrote:
> > > > > > >
> > > > > > > This is my second Poly-800. The first had a problem
with the
> > > > > > > headphone amp and DC-in jack. This one works great and I
> > > don't want
> > > > > > > to muck it up.
> > > > > > >
> > > > > > > If some one can answer my question I promise not to tell
> > > anyone what
> > > > > > > really happened on 9/11.
> > > > > > >
> > > > > > > So, to cut or not to cut?
> > > > > > >
> > > > > > >
> > > > > > > --- In korgpolyex@yahoogro ups.com, "funkymonkeypeter"
> > > > > > > <funkymonkey3. 14@> wrote:
> > > > > > > >
> > > > > > > > Regarding the instructions here:
> > > > > > > >
> > > > > > > >
http://analog. no/mods/korg_ poly-800_ mk-1_battery_ backup.htm
> > > > > > > >
> > > > > > > >
> > > > > > > > * Open the Poly-800 by removing all screws at the
> bottom.
> > > > > Locate
> > > > > > > > the processor board. This is the large circuit board next
> > to the
> > > > > > > > battery compartment.
> > > > > > > > * 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.)
> > > > > > > > * If you have a late revision MK-1 there will be two
> > fairly
> > > > > large
> > > > > > > > solder "islands" in the center of the board. The
battery is
> > > > mounted
> > > > > > > > here. The "island" to the front of the keyboard is ground.
> > > > > > > > * If you have an early revision you wont find
this. 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.
> > > > > > > > * Any 3V lithium with solder lugs can be used as long
> > as it
> > > > > is not
> > > > > > > > to big physically for mounting to the board. A
> wristwatch type
> > > > > (2025,
> > > > > > > > 2032) is fine.
> > > > > > > >
> > > > > > > >
> > > > > > > >
> > > > > > > > I have the model with the solder islands, do i need to
> cut the
> > > > > legs to
> > > > > > > > R1 and D1? Or can I just solder to the islands and leave
> > > > everything
> > > > > > > > else intact?
> > > > > > > >
> > > > > > > > Thank you.
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>

--- In korgpolyex@yahoogroups.com, Marcus Wilson <JB@...> wrote:
>
> the headphone output that died on my poly was on the chorus board,
>
> there is a 8 pin SIL chip amp that is the headphone amp
>
> I managed to replace it with an 8 pin DIL amp using some funky wiring
> to make it work
>
> try swapping the chorus board over to isolate the headphone amp issue
> on one board, and if it is definately there, I can locate the part
> number for the part i used to replace mine and bring it back to life
>
> best regards,
>
> Marcus Wilson
>
> On 03/03/2008, at 4:57 AM, Funky Monkey wrote:
>
> > Holly crap, you must be looking over my shoulder.
> >
> > I have 2 poly 800s
> >
> > Poly 1 would not run on wall DC power (only batteries) and did not
> > output at the headphone amp and had a backup battery installed but
> > R1 and D1 was not cut. (good keyboard action though)
> >
> > Poly 2 runs on batteries and wall DC and has headphone output (no
> > Li-Ion installed). But had a kina warped keybed with uneven note
> > triggering (a later job).
> >
> > So i just now i took the good Top (Poly 1) and put it on the Good
> > Bottom (poly 2). Now it runs on batteries and Wall DC but still no
> > Headphone Out. So Im thinking that the headphone out is upperboard
> > related. Any help would be met with a song of praise.
> >
> >
> >
> >
> >
> >
> >
> > To: korgpolyex@yahoogroups.com
> > From: JB@...
> > Date: Mon, 3 Mar 2008 04:42:52 +0900
> > Subject: Re: [korgpolyex] Re: Question regarding backup battery mod.
> >
> > Hi there!
> >
> > when you mention the headphone amp gone bad, I had that issue with
> > one of my polys, and I managed to jury rig a repair, that has
> > worked well
> >
> > do you still have the first poly? and are you interested in a how
> > to to fix the headphone amp? (im assuming that the L/R 1/4" trs
> > connectors still output line level fine)
> >
> > best regards,
> >
> > Marcus Wilson
> > On 02/03/2008, at 3:08 AM, funkymonkeypeter wrote:
> >
> > This is my second Poly-800. The first had a problem with the
> > headphone amp and DC-in jack. This one works great and I don't want
> > to muck it up.
> >
> > If some one can answer my question I promise not to tell anyone what
> > really happened on 9/11.
> >
> > So, to cut or not to cut?
> >
> > --- In korgpolyex@yahoogroups.com, "funkymonkeypeter"
> > <funkymonkey3.14@> wrote:
> > >
> > > Regarding the instructions here:
> > >
> > > http://analog.no/mods/korg_poly-800_mk-1_battery_backup.htm
> > >
> > >
> > > * Open the Poly-800 by removing all screws at the bottom. Locate
> > > the processor board. This is the large circuit board next to the
> > > battery compartment.
> > > * 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.)
> > > * If you have a late revision MK-1 there will be two fairly large
> > > solder "islands" in the center of the board. The battery is mounted
> > > here. The "island" to the front of the keyboard is ground.
> > > * If you have an early revision you wont find this. 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.
> > > * Any 3V lithium with solder lugs can be used as long as it is not
> > > to big physically for mounting to the board. A wristwatch type
> > (2025,
> > > 2032) is fine.
> > >
> > >
> > >
> > > I have the model with the solder islands, do i need to cut the
> > legs to
> > > R1 and D1? Or can I just solder to the islands and leave everything
> > > else intact?
> > >
> > > Thank you.
> > >
> >
> >
> >
> >
> >
> >
> >
> >
>