Discussion about the Korg PolySix synthesizer

Hello! I picked up a Korg Polysix recently and I've been trying to bring
it back to life. Nothing I've done has changed anything yet so I'm at a
bit of an impasse and I'm hoping someone out there might be able to help
me narrow down what I should do next. I know how to use a soldering iron
but I'm a complete beginner at repairing circuit board traces.

Let me give you the symptoms.

1. It sounds like it's gone absolutely mental with constant oscillation
and other insanity going on from the moment I power it up.
2. The Bank D and Program 4 buttons are constantly illuminated after
powering up.

After cleaning up most of the corrosion I could find around the battery,
it really didn't look as bad as I thought it might so I went ahead and
just installed a Lithium battery holder (using Old Crow's guide) and
tried powering up again. Nothing changed.

After that, I went back in and removed the IC31 chip (74LS08) and tested
all the traces in the area with a multimeter. Every trace I tested gave
me a happy little beep, even the uglier looking ones that were near the
old battery, so I went ahead and soldered in a new socket and 74LS08
chip at IC31. Powered up. Nothing changed.

Now, I'm not sure what to do. Did I miss a trace? Should I put jumper
wires on the ugly looking traces even if my multimeter says they're
conducting just fine? Should I replace the other ICs that were near the
battery like IC30 even if they look fine?

I recorded a sound demo. For the first 40 seconds I don't touch a thing,
then I start to experiment:


Bank D and Program 4 constantly illuminated:


First sight:
<http://imgur.com/Wv173WQ>

After initial cleanup:
<http://imgur.com/M8POlkz>

Installed battery:
<http://imgur.com/Pj3kDFT>

Replaced IC31:
<http://imgur.com/Nab9GYz>




[Non-text portions of this message have been removed]

Sorry, some of my formatting didn't make it through to the final post. I meant to include these.

sound demo:
https://soundcloud.com/ocguitar/korg-polysix-death-sounds

Bank D and Program 4 constantly illuminated:
http://imgur.com/TFEPUPB

Thank you! Any advice would be appreciated.
-Steve

--- In PolySix@yahoogroups.com, "traxus12" <ocguitar@...> wrote:
>
> Hello! I picked up a Korg Polysix recently and I've been trying to bring
> it back to life. Nothing I've done has changed anything yet so I'm at a
> bit of an impasse and I'm hoping someone out there might be able to help
> me narrow down what I should do next. I know how to use a soldering iron
> but I'm a complete beginner at repairing circuit board traces.
>
> Let me give you the symptoms.
>
> 1. It sounds like it's gone absolutely mental with constant oscillation
> and other insanity going on from the moment I power it up.
> 2. The Bank D and Program 4 buttons are constantly illuminated after
> powering up.
>
> After cleaning up most of the corrosion I could find around the battery,
> it really didn't look as bad as I thought it might so I went ahead and
> just installed a Lithium battery holder (using Old Crow's guide) and
> tried powering up again. Nothing changed.
>
> After that, I went back in and removed the IC31 chip (74LS08) and tested
> all the traces in the area with a multimeter. Every trace I tested gave
> me a happy little beep, even the uglier looking ones that were near the
> old battery, so I went ahead and soldered in a new socket and 74LS08
> chip at IC31. Powered up. Nothing changed.
>
> Now, I'm not sure what to do. Did I miss a trace? Should I put jumper
> wires on the ugly looking traces even if my multimeter says they're
> conducting just fine? Should I replace the other ICs that were near the
> battery like IC30 even if they look fine?
>
> I recorded a sound demo. For the first 40 seconds I don't touch a thing,
> then I start to experiment:
>
>
> Bank D and Program 4 constantly illuminated:
>
>
> First sight:
> <http://imgur.com/Wv173WQ>
>
> After initial cleanup:
> <http://imgur.com/M8POlkz>
>
> Installed battery:
> <http://imgur.com/Pj3kDFT>
>
> Replaced IC31:
> <http://imgur.com/Nab9GYz>
>
>
>
>
> [Non-text portions of this message have been removed]
>

Mate, that sounds wicked! Proper Residents style! Obviously you probably don't want it to sound like that all the time......

Good luck on here. Someone usually can help. I know nothing - although its usually the voice assigner thats gone on these - my P6 is still "in the shop". My P61 is in the same state too, was thinking of replacing the batt myself but think ill just send it to an expert now reading about your troubles. Again, good luck

Chris

Sent from my iBrain

On Aug 7, 2013, at 10:02 AM, "traxus12" <ocguitar@gmail.com> wrote:

> Sorry, some of my formatting didn't make it through to the final post. I meant to include these.
>
> sound demo:
> https://soundcloud.com/ocguitar/korg-polysix-death-sounds
>
> Bank D and Program 4 constantly illuminated:
> http://imgur.com/TFEPUPB
>
> Thank you! Any advice would be appreciated.
> -Steve
>
> --- In PolySix@yahoogroups.com, "traxus12" <ocguitar@...> wrote:
> >
> > Hello! I picked up a Korg Polysix recently and I've been trying to bring
> > it back to life. Nothing I've done has changed anything yet so I'm at a
> > bit of an impasse and I'm hoping someone out there might be able to help
> > me narrow down what I should do next. I know how to use a soldering iron
> > but I'm a complete beginner at repairing circuit board traces.
> >
> > Let me give you the symptoms.
> >
> > 1. It sounds like it's gone absolutely mental with constant oscillation
> > and other insanity going on from the moment I power it up.
> > 2. The Bank D and Program 4 buttons are constantly illuminated after
> > powering up.
> >
> > After cleaning up most of the corrosion I could find around the battery,
> > it really didn't look as bad as I thought it might so I went ahead and
> > just installed a Lithium battery holder (using Old Crow's guide) and
> > tried powering up again. Nothing changed.
> >
> > After that, I went back in and removed the IC31 chip (74LS08) and tested
> > all the traces in the area with a multimeter. Every trace I tested gave
> > me a happy little beep, even the uglier looking ones that were near the
> > old battery, so I went ahead and soldered in a new socket and 74LS08
> > chip at IC31. Powered up. Nothing changed.
> >
> > Now, I'm not sure what to do. Did I miss a trace? Should I put jumper
> > wires on the ugly looking traces even if my multimeter says they're
> > conducting just fine? Should I replace the other ICs that were near the
> > battery like IC30 even if they look fine?
> >
> > I recorded a sound demo. For the first 40 seconds I don't touch a thing,
> > then I start to experiment:
> >
> >
> > Bank D and Program 4 constantly illuminated:
> >
> >
> > First sight:
> > <http://imgur.com/Wv173WQ>
> >
> > After initial cleanup:
> > <http://imgur.com/M8POlkz>
> >
> > Installed battery:
> > <http://imgur.com/Pj3kDFT>
> >
> > Replaced IC31:
> > <http://imgur.com/Nab9GYz>
> >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
>


[Non-text portions of this message have been removed]

That board doesn't look too bad at all. Most look much worse after a battery
leak. Unfortunately that means there is no easy way to point to the problem
without some long and tedious debugging. You will need a digital multimeter,
not just something that goes "beep", and you will need the schematics. It
sounds like a problem on the D0-D7 data bus coming off of IC30 and IC31 and
you will need to check those traces again and actually measure the
resistance. Any trace more than 0.5 ohms should probably be fixed. The data
bus connects many chips together and you will need to check between each
chip, which is why you will need the schematics to see which pins on which
chips should be connected. As mentioned by Andy Jury in several old posts, a
good way to do this is to check continuity from connector CN10 to each of
these chips: IC 30, 31, 26, 24, 33, 28, 29, 34, 35 and CN06 on each of the
eight bus lines. Like I said, tedious.

You will have to watch out for the mislabeled chip in the diagram. There are
two IC 34 in the diagram. The one beside IC 30 is actually IC 24.



Don Backshall



_____

From: PolySix@yahoogroups.com [mailto:PolySix@yahoogroups.com] On Behalf Of
traxus12
Sent: Wednesday, August 07, 2013 5:02 AM
To: PolySix@yahoogroups.com
Subject: [PolySix] Re: Help! Repairing a Polysix with burst battery (sound
demo + photos!)





Sorry, some of my formatting didn't make it through to the final post. I
meant to include these.

sound demo:
https://soundcloud.com/ocguitar/korg-polysix-death-sounds

Bank D and Program 4 constantly illuminated:
http://imgur.com/TFEPUPB

Thank you! Any advice would be appreciated.
-Steve

--- In PolySix@yahoogroups.com <mailto:PolySix%40yahoogroups.com> ,
"traxus12" <ocguitar@...> wrote:

>
> Hello! I picked up a Korg Polysix recently and I've been trying to bring
> it back to life. Nothing I've done has changed anything yet so I'm at a
> bit of an impasse and I'm hoping someone out there might be able to help
> me narrow down what I should do next. I know how to use a soldering iron
> but I'm a complete beginner at repairing circuit board traces.
>
> Let me give you the symptoms.
>
> 1. It sounds like it's gone absolutely mental with constant oscillation
> and other insanity going on from the moment I power it up.
> 2. The Bank D and Program 4 buttons are constantly illuminated after
> powering up.
>
> After cleaning up most of the corrosion I could find around the battery,
> it really didn't look as bad as I thought it might so I went ahead and
> just installed a Lithium battery holder (using Old Crow's guide) and
> tried powering up again. Nothing changed.
>
> After that, I went back in and removed the IC31 chip (74LS08) and tested
> all the traces in the area with a multimeter. Every trace I tested gave
> me a happy little beep, even the uglier looking ones that were near the
> old battery, so I went ahead and soldered in a new socket and 74LS08
> chip at IC31. Powered up. Nothing changed.
>
> Now, I'm not sure what to do. Did I miss a trace? Should I put jumper
> wires on the ugly looking traces even if my multimeter says they're
> conducting just fine? Should I replace the other ICs that were near the
> battery like IC30 even if they look fine?
>
> I recorded a sound demo. For the first 40 seconds I don't touch a thing,
> then I start to experiment:
>
>
> Bank D and Program 4 constantly illuminated:
>
>
> First sight:
> <http://imgur.com/Wv173WQ>
>
> After initial cleanup:
> <http://imgur.com/M8POlkz>
>
> Installed battery:
> <http://imgur.com/Pj3kDFT>
>
> Replaced IC31:
> <http://imgur.com/Nab9GYz>
>
>
>
>
> [Non-text portions of this message have been removed]
>

[Non-text portions of this message have been removed]

Hi Steve,
The D(SW12) and 4(SW18)Switches uses the same line in the Programmer matrix, identified P13, Pin-5 of CN10 welded to the KLM-371(programmer board)
On the KLM-371 between the SW15(PROGRAM-1) & the SW16(PROGRAM-2) you have a Fixing screw.
The P13 trace pass just above,
removed this screw and turn on the P6 on says us !
All the Best
Djé

--- In PolySix@yahoogroups.com, "traxus12" <ocguitar@...> wrote:
>
> Sorry, some of my formatting didn't make it through to the final post. I meant to include these.
>
> sound demo:
> https://soundcloud.com/ocguitar/korg-polysix-death-sounds
>
> Bank D and Program 4 constantly illuminated:
> http://imgur.com/TFEPUPB
>
> Thank you! Any advice would be appreciated.
> -Steve
>
> --- In PolySix@yahoogroups.com, "traxus12" <ocguitar@> wrote:
> >
> > Hello! I picked up a Korg Polysix recently and I've been trying to bring
> > it back to life. Nothing I've done has changed anything yet so I'm at a
> > bit of an impasse and I'm hoping someone out there might be able to help
> > me narrow down what I should do next. I know how to use a soldering iron
> > but I'm a complete beginner at repairing circuit board traces.
> >
> > Let me give you the symptoms.
> >
> > 1. It sounds like it's gone absolutely mental with constant oscillation
> > and other insanity going on from the moment I power it up.
> > 2. The Bank D and Program 4 buttons are constantly illuminated after
> > powering up.
> >
> > After cleaning up most of the corrosion I could find around the battery,
> > it really didn't look as bad as I thought it might so I went ahead and
> > just installed a Lithium battery holder (using Old Crow's guide) and
> > tried powering up again. Nothing changed.
> >
> > After that, I went back in and removed the IC31 chip (74LS08) and tested
> > all the traces in the area with a multimeter. Every trace I tested gave
> > me a happy little beep, even the uglier looking ones that were near the
> > old battery, so I went ahead and soldered in a new socket and 74LS08
> > chip at IC31. Powered up. Nothing changed.
> >
> > Now, I'm not sure what to do. Did I miss a trace? Should I put jumper
> > wires on the ugly looking traces even if my multimeter says they're
> > conducting just fine? Should I replace the other ICs that were near the
> > battery like IC30 even if they look fine?
> >
> > I recorded a sound demo. For the first 40 seconds I don't touch a thing,
> > then I start to experiment:
> >
> >
> > Bank D and Program 4 constantly illuminated:
> >
> >
> > First sight:
> > <http://imgur.com/Wv173WQ>
> >
> > After initial cleanup:
> > <http://imgur.com/M8POlkz>
> >
> > Installed battery:
> > <http://imgur.com/Pj3kDFT>
> >
> > Replaced IC31:
> > <http://imgur.com/Nab9GYz>
> >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>

A debugging rule that people overlook is that not only do you want to
check "low-resistance" continuity between your points (your DMM's
"beep" might trigger like this, they vary), but you want to make sure
that there is *NO* continuity between neighboring traces. Sometimes,
a neighboring trace might be on the other side of the board. Luckily,
these boards are only 2-sided!

Here's the schematics:
http://www.chromatest.net/POLY6_Service_Ensemble.pdf

Good luck!

-chromatest

On Wed, Aug 7, 2013 at 5:47 AM, Djé <onoffart@orange.fr> wrote:
> Hi Steve,
> The D(SW12) and 4(SW18)Switches uses the same line in the Programmer matrix, identified P13, Pin-5 of CN10 welded to the KLM-371(programmer board)
> On the KLM-371 between the SW15(PROGRAM-1) & the SW16(PROGRAM-2) you have a Fixing screw.
> The P13 trace pass just above,
> removed this screw and turn on the P6 on says us !
> All the Best
> Djé
>
> --- In PolySix@yahoogroups.com, "traxus12" <ocguitar@...> wrote:
>>
>> Sorry, some of my formatting didn't make it through to the final post. I meant to include these.
>>
>> sound demo:
>> https://soundcloud.com/ocguitar/korg-polysix-death-sounds
>>
>> Bank D and Program 4 constantly illuminated:
>> http://imgur.com/TFEPUPB
>>
>> Thank you! Any advice would be appreciated.
>> -Steve
>>
>> --- In PolySix@yahoogroups.com, "traxus12" <ocguitar@> wrote:
>> >
>> > Hello! I picked up a Korg Polysix recently and I've been trying to bring
>> > it back to life. Nothing I've done has changed anything yet so I'm at a
>> > bit of an impasse and I'm hoping someone out there might be able to help
>> > me narrow down what I should do next. I know how to use a soldering iron
>> > but I'm a complete beginner at repairing circuit board traces.
>> >
>> > Let me give you the symptoms.
>> >
>> > 1. It sounds like it's gone absolutely mental with constant oscillation
>> > and other insanity going on from the moment I power it up.
>> > 2. The Bank D and Program 4 buttons are constantly illuminated after
>> > powering up.
>> >
>> > After cleaning up most of the corrosion I could find around the battery,
>> > it really didn't look as bad as I thought it might so I went ahead and
>> > just installed a Lithium battery holder (using Old Crow's guide) and
>> > tried powering up again. Nothing changed.
>> >
>> > After that, I went back in and removed the IC31 chip (74LS08) and tested
>> > all the traces in the area with a multimeter. Every trace I tested gave
>> > me a happy little beep, even the uglier looking ones that were near the
>> > old battery, so I went ahead and soldered in a new socket and 74LS08
>> > chip at IC31. Powered up. Nothing changed.
>> >
>> > Now, I'm not sure what to do. Did I miss a trace? Should I put jumper
>> > wires on the ugly looking traces even if my multimeter says they're
>> > conducting just fine? Should I replace the other ICs that were near the
>> > battery like IC30 even if they look fine?
>> >
>> > I recorded a sound demo. For the first 40 seconds I don't touch a thing,
>> > then I start to experiment:
>> >
>> >
>> > Bank D and Program 4 constantly illuminated:
>> >
>> >
>> > First sight:
>> > <http://imgur.com/Wv173WQ>
>> >
>> > After initial cleanup:
>> > <http://imgur.com/M8POlkz>
>> >
>> > Installed battery:
>> > <http://imgur.com/Pj3kDFT>
>> >
>> > Replaced IC31:
>> > <http://imgur.com/Nab9GYz>
>> >
>> >
>> >
>> >
>> > [Non-text portions of this message have been removed]
>> >
>>
>
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>

I tried removing the screw and powering up. No change.

If only it could be that simple!

--- In PolySix@yahoogroups.com, Djé <onoffart@...> wrote:
>
> Hi Steve,
> The D(SW12) and 4(SW18)Switches uses the same line in the Programmer matrix, identified P13, Pin-5 of CN10 welded to the KLM-371(programmer board)
> On the KLM-371 between the SW15(PROGRAM-1) & the SW16(PROGRAM-2) you have a Fixing screw.
> The P13 trace pass just above,
> removed this screw and turn on the P6 on says us !
> All the Best
> Djé
>
> --- In PolySix@yahoogroups.com, "traxus12" <ocguitar@> wrote:
> >
> > Sorry, some of my formatting didn't make it through to the final post. I meant to include these.
> >
> > sound demo:
> > https://soundcloud.com/ocguitar/korg-polysix-death-sounds
> >
> > Bank D and Program 4 constantly illuminated:
> > http://imgur.com/TFEPUPB
> >
> > Thank you! Any advice would be appreciated.
> > -Steve
> >
> > --- In PolySix@yahoogroups.com, "traxus12" <ocguitar@> wrote:
> > >
> > > Hello! I picked up a Korg Polysix recently and I've been trying to bring
> > > it back to life. Nothing I've done has changed anything yet so I'm at a
> > > bit of an impasse and I'm hoping someone out there might be able to help
> > > me narrow down what I should do next. I know how to use a soldering iron
> > > but I'm a complete beginner at repairing circuit board traces.
> > >
> > > Let me give you the symptoms.
> > >
> > > 1. It sounds like it's gone absolutely mental with constant oscillation
> > > and other insanity going on from the moment I power it up.
> > > 2. The Bank D and Program 4 buttons are constantly illuminated after
> > > powering up.
> > >
> > > After cleaning up most of the corrosion I could find around the battery,
> > > it really didn't look as bad as I thought it might so I went ahead and
> > > just installed a Lithium battery holder (using Old Crow's guide) and
> > > tried powering up again. Nothing changed.
> > >
> > > After that, I went back in and removed the IC31 chip (74LS08) and tested
> > > all the traces in the area with a multimeter. Every trace I tested gave
> > > me a happy little beep, even the uglier looking ones that were near the
> > > old battery, so I went ahead and soldered in a new socket and 74LS08
> > > chip at IC31. Powered up. Nothing changed.
> > >
> > > Now, I'm not sure what to do. Did I miss a trace? Should I put jumper
> > > wires on the ugly looking traces even if my multimeter says they're
> > > conducting just fine? Should I replace the other ICs that were near the
> > > battery like IC30 even if they look fine?
> > >
> > > I recorded a sound demo. For the first 40 seconds I don't touch a thing,
> > > then I start to experiment:
> > >
> > >
> > > Bank D and Program 4 constantly illuminated:
> > >
> > >
> > > First sight:
> > > <http://imgur.com/Wv173WQ>
> > >
> > > After initial cleanup:
> > > <http://imgur.com/M8POlkz>
> > >
> > > Installed battery:
> > > <http://imgur.com/Pj3kDFT>
> > >
> > > Replaced IC31:
> > > <http://imgur.com/Nab9GYz>
> > >
> > >
> > >
> > >
> > > [Non-text portions of this message have been removed]
> > >
> >
>

when you press the 8-switch what happening ?
you can use the others switch A to C and 1 to 8 ?
Make a bonding test of Pin5 and GND to de CN10 of the KLM-371
can you make a pic of the KLM-371

--- In PolySix@yahoogroups.com, "traxus12" <ocguitar@...> wrote:
>
> I tried removing the screw and powering up. No change.
>
> If only it could be that simple!
>
> --- In PolySix@yahoogroups.com, Djé <onoffart@> wrote:
> >
> > Hi Steve,
> > The D(SW12) and 4(SW18)Switches uses the same line in the Programmer matrix, identified P13, Pin-5 of CN10 welded to the KLM-371(programmer board)
> > On the KLM-371 between the SW15(PROGRAM-1) & the SW16(PROGRAM-2) you have a Fixing screw.
> > The P13 trace pass just above,
> > removed this screw and turn on the P6 on says us !
> > All the Best
> > Djé
> >
> > --- In PolySix@yahoogroups.com, "traxus12" <ocguitar@> wrote:
> > >
> > > Sorry, some of my formatting didn't make it through to the final post. I meant to include these.
> > >
> > > sound demo:
> > > https://soundcloud.com/ocguitar/korg-polysix-death-sounds
> > >
> > > Bank D and Program 4 constantly illuminated:
> > > http://imgur.com/TFEPUPB
> > >
> > > Thank you! Any advice would be appreciated.
> > > -Steve
> > >
> > > --- In PolySix@yahoogroups.com, "traxus12" <ocguitar@> wrote:
> > > >
> > > > Hello! I picked up a Korg Polysix recently and I've been trying to bring
> > > > it back to life. Nothing I've done has changed anything yet so I'm at a
> > > > bit of an impasse and I'm hoping someone out there might be able to help
> > > > me narrow down what I should do next. I know how to use a soldering iron
> > > > but I'm a complete beginner at repairing circuit board traces.
> > > >
> > > > Let me give you the symptoms.
> > > >
> > > > 1. It sounds like it's gone absolutely mental with constant oscillation
> > > > and other insanity going on from the moment I power it up.
> > > > 2. The Bank D and Program 4 buttons are constantly illuminated after
> > > > powering up.
> > > >
> > > > After cleaning up most of the corrosion I could find around the battery,
> > > > it really didn't look as bad as I thought it might so I went ahead and
> > > > just installed a Lithium battery holder (using Old Crow's guide) and
> > > > tried powering up again. Nothing changed.
> > > >
> > > > After that, I went back in and removed the IC31 chip (74LS08) and tested
> > > > all the traces in the area with a multimeter. Every trace I tested gave
> > > > me a happy little beep, even the uglier looking ones that were near the
> > > > old battery, so I went ahead and soldered in a new socket and 74LS08
> > > > chip at IC31. Powered up. Nothing changed.
> > > >
> > > > Now, I'm not sure what to do. Did I miss a trace? Should I put jumper
> > > > wires on the ugly looking traces even if my multimeter says they're
> > > > conducting just fine? Should I replace the other ICs that were near the
> > > > battery like IC30 even if they look fine?
> > > >
> > > > I recorded a sound demo. For the first 40 seconds I don't touch a thing,
> > > > then I start to experiment:
> > > >
> > > >
> > > > Bank D and Program 4 constantly illuminated:
> > > >
> > > >
> > > > First sight:
> > > > <http://imgur.com/Wv173WQ>
> > > >
> > > > After initial cleanup:
> > > > <http://imgur.com/M8POlkz>
> > > >
> > > > Installed battery:
> > > > <http://imgur.com/Pj3kDFT>
> > > >
> > > > Replaced IC31:
> > > > <http://imgur.com/Nab9GYz>
> > > >
> > > >
> > > >
> > > >
> > > > [Non-text portions of this message have been removed]
> > > >
> > >
> >
>

Thanks! I'll try that. Hopefully I can find the culprit. By the way, I'm using a Simpson 260-8XI analog multimeter.

I just remembered that the previous owner mentioned it was working fine when he got it from his school a few years ago and it had just been sitting in his garage since then. So whatever went wrong happened within the last few years, if that's any clue.

--- In PolySix@yahoogroups.com, "backshall1" <backshall1@...> wrote:
>
> That board doesn't look too bad at all. Most look much worse after a battery
> leak. Unfortunately that means there is no easy way to point to the problem
> without some long and tedious debugging. You will need a digital multimeter,
> not just something that goes "beep", and you will need the schematics. It
> sounds like a problem on the D0-D7 data bus coming off of IC30 and IC31 and
> you will need to check those traces again and actually measure the
> resistance. Any trace more than 0.5 ohms should probably be fixed. The data
> bus connects many chips together and you will need to check between each
> chip, which is why you will need the schematics to see which pins on which
> chips should be connected. As mentioned by Andy Jury in several old posts, a
> good way to do this is to check continuity from connector CN10 to each of
> these chips: IC 30, 31, 26, 24, 33, 28, 29, 34, 35 and CN06 on each of the
> eight bus lines. Like I said, tedious.
>
> You will have to watch out for the mislabeled chip in the diagram. There are
> two IC 34 in the diagram. The one beside IC 30 is actually IC 24.
>
>
>
> Don Backshall
>
>
>
> _____
>
> From: PolySix@yahoogroups.com [mailto:PolySix@yahoogroups.com] On Behalf Of
> traxus12
> Sent: Wednesday, August 07, 2013 5:02 AM
> To: PolySix@yahoogroups.com
> Subject: [PolySix] Re: Help! Repairing a Polysix with burst battery (sound
> demo + photos!)
>
>
>
>
>
> Sorry, some of my formatting didn't make it through to the final post. I
> meant to include these.
>
> sound demo:
> https://soundcloud.com/ocguitar/korg-polysix-death-sounds
>
> Bank D and Program 4 constantly illuminated:
> http://imgur.com/TFEPUPB
>
> Thank you! Any advice would be appreciated.
> -Steve
>
> --- In PolySix@yahoogroups.com <mailto:PolySix%40yahoogroups.com> ,
> "traxus12" <ocguitar@> wrote:
> >
> > Hello! I picked up a Korg Polysix recently and I've been trying to bring
> > it back to life. Nothing I've done has changed anything yet so I'm at a
> > bit of an impasse and I'm hoping someone out there might be able to help
> > me narrow down what I should do next. I know how to use a soldering iron
> > but I'm a complete beginner at repairing circuit board traces.
> >
> > Let me give you the symptoms.
> >
> > 1. It sounds like it's gone absolutely mental with constant oscillation
> > and other insanity going on from the moment I power it up.
> > 2. The Bank D and Program 4 buttons are constantly illuminated after
> > powering up.
> >
> > After cleaning up most of the corrosion I could find around the battery,
> > it really didn't look as bad as I thought it might so I went ahead and
> > just installed a Lithium battery holder (using Old Crow's guide) and
> > tried powering up again. Nothing changed.
> >
> > After that, I went back in and removed the IC31 chip (74LS08) and tested
> > all the traces in the area with a multimeter. Every trace I tested gave
> > me a happy little beep, even the uglier looking ones that were near the
> > old battery, so I went ahead and soldered in a new socket and 74LS08
> > chip at IC31. Powered up. Nothing changed.
> >
> > Now, I'm not sure what to do. Did I miss a trace? Should I put jumper
> > wires on the ugly looking traces even if my multimeter says they're
> > conducting just fine? Should I replace the other ICs that were near the
> > battery like IC30 even if they look fine?
> >
> > I recorded a sound demo. For the first 40 seconds I don't touch a thing,
> > then I start to experiment:
> >
> >
> > Bank D and Program 4 constantly illuminated:
> >
> >
> > First sight:
> > <http://imgur.com/Wv173WQ>
> >
> > After initial cleanup:
> > <http://imgur.com/M8POlkz>
> >
> > Installed battery:
> > <http://imgur.com/Pj3kDFT>
> >
> > Replaced IC31:
> > <http://imgur.com/Nab9GYz>
> >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
>
>
>
>
> [Non-text portions of this message have been removed]
>

Thanks. I haven't tried that. I'll check it out. It's nice to have a little more direction now. I wish the problem were more obvious. It reminds me of "Where's Waldo/Wally?" except there's a thousand people in the picture and Waldo looks exactly like everyone else.

--- In PolySix@yahoogroups.com, "Chromatest J. Pantsmaker" <chromatest@...> wrote:
>
> A debugging rule that people overlook is that not only do you want to
> check "low-resistance" continuity between your points (your DMM's
> "beep" might trigger like this, they vary), but you want to make sure
> that there is *NO* continuity between neighboring traces. Sometimes,
> a neighboring trace might be on the other side of the board. Luckily,
> these boards are only 2-sided!
>
> Here's the schematics:
> http://www.chromatest.net/POLY6_Service_Ensemble.pdf
>
> Good luck!
>
> -chromatest
>
> On Wed, Aug 7, 2013 at 5:47 AM, Djé <onoffart@...> wrote:
> > Hi Steve,
> > The D(SW12) and 4(SW18)Switches uses the same line in the Programmer matrix, identified P13, Pin-5 of CN10 welded to the KLM-371(programmer board)
> > On the KLM-371 between the SW15(PROGRAM-1) & the SW16(PROGRAM-2) you have a Fixing screw.
> > The P13 trace pass just above,
> > removed this screw and turn on the P6 on says us !
> > All the Best
> > Djé
> >
> > --- In PolySix@yahoogroups.com, "traxus12" <ocguitar@> wrote:
> >>
> >> Sorry, some of my formatting didn't make it through to the final post. I meant to include these.
> >>
> >> sound demo:
> >> https://soundcloud.com/ocguitar/korg-polysix-death-sounds
> >>
> >> Bank D and Program 4 constantly illuminated:
> >> http://imgur.com/TFEPUPB
> >>
> >> Thank you! Any advice would be appreciated.
> >> -Steve
> >>
> >> --- In PolySix@yahoogroups.com, "traxus12" <ocguitar@> wrote:
> >> >
> >> > Hello! I picked up a Korg Polysix recently and I've been trying to bring
> >> > it back to life. Nothing I've done has changed anything yet so I'm at a
> >> > bit of an impasse and I'm hoping someone out there might be able to help
> >> > me narrow down what I should do next. I know how to use a soldering iron
> >> > but I'm a complete beginner at repairing circuit board traces.
> >> >
> >> > Let me give you the symptoms.
> >> >
> >> > 1. It sounds like it's gone absolutely mental with constant oscillation
> >> > and other insanity going on from the moment I power it up.
> >> > 2. The Bank D and Program 4 buttons are constantly illuminated after
> >> > powering up.
> >> >
> >> > After cleaning up most of the corrosion I could find around the battery,
> >> > it really didn't look as bad as I thought it might so I went ahead and
> >> > just installed a Lithium battery holder (using Old Crow's guide) and
> >> > tried powering up again. Nothing changed.
> >> >
> >> > After that, I went back in and removed the IC31 chip (74LS08) and tested
> >> > all the traces in the area with a multimeter. Every trace I tested gave
> >> > me a happy little beep, even the uglier looking ones that were near the
> >> > old battery, so I went ahead and soldered in a new socket and 74LS08
> >> > chip at IC31. Powered up. Nothing changed.
> >> >
> >> > Now, I'm not sure what to do. Did I miss a trace? Should I put jumper
> >> > wires on the ugly looking traces even if my multimeter says they're
> >> > conducting just fine? Should I replace the other ICs that were near the
> >> > battery like IC30 even if they look fine?
> >> >
> >> > I recorded a sound demo. For the first 40 seconds I don't touch a thing,
> >> > then I start to experiment:
> >> >
> >> >
> >> > Bank D and Program 4 constantly illuminated:
> >> >
> >> >
> >> > First sight:
> >> > <http://imgur.com/Wv173WQ>
> >> >
> >> > After initial cleanup:
> >> > <http://imgur.com/M8POlkz>
> >> >
> >> > Installed battery:
> >> > <http://imgur.com/Pj3kDFT>
> >> >
> >> > Replaced IC31:
> >> > <http://imgur.com/Nab9GYz>
> >> >
> >> >
> >> >
> >> >
> >> > [Non-text portions of this message have been removed]
> >> >
> >>
> >
> >
> >
> >
> > ------------------------------------
> >
> > Yahoo! Groups Links
> >
> >
> >
>

That's a nice meter. On the Rx1 scale you should easily be able to see if
any tracks are approaching 1 ohm, which is a sign they should be fixed. Just
make sure it's zeroed properly. I said digital meter because most analog
meters aren't very accurate on that low scale. If the previous owner said
this Polysix was working fine a few years ago, then I think his definition
of a "few" is different than mine. I would guess a decade or more.

Don B.



_____

From: PolySix@yahoogroups.com [mailto:PolySix@yahoogroups.com] On Behalf Of
traxus12
Sent: Wednesday, August 07, 2013 4:25 PM
To: PolySix@yahoogroups.com
Subject: [PolySix] Re: Help! Repairing a Polysix with burst battery (sound
demo + photos!)





Thanks! I'll try that. Hopefully I can find the culprit. By the way, I'm
using a Simpson 260-8XI analog multimeter.

I just remembered that the previous owner mentioned it was working fine when
he got it from his school a few years ago and it had just been sitting in
his garage since then. So whatever went wrong happened within the last few
years, if that's any clue.

--- In PolySix@yahoogroups.com <mailto:PolySix%40yahoogroups.com> ,
"backshall1" <backshall1@...> wrote:

>
> That board doesn't look too bad at all. Most look much worse after a

battery

> leak. Unfortunately that means there is no easy way to point to the

problem

> without some long and tedious debugging. You will need a digital

multimeter,

> not just something that goes "beep", and you will need the schematics. It
> sounds like a problem on the D0-D7 data bus coming off of IC30 and IC31

and

> you will need to check those traces again and actually measure the
> resistance. Any trace more than 0.5 ohms should probably be fixed. The

data

> bus connects many chips together and you will need to check between each
> chip, which is why you will need the schematics to see which pins on which
> chips should be connected. As mentioned by Andy Jury in several old posts,

a

> good way to do this is to check continuity from connector CN10 to each of
> these chips: IC 30, 31, 26, 24, 33, 28, 29, 34, 35 and CN06 on each of the
> eight bus lines. Like I said, tedious.
>
> You will have to watch out for the mislabeled chip in the diagram. There

are

> two IC 34 in the diagram. The one beside IC 30 is actually IC 24.
>
>
>
> Don Backshall
>
>
>
> _____
>
> From: PolySix@yahoogroups.com <mailto:PolySix%40yahoogroups.com>

[mailto:PolySix@yahoogroups.com <mailto:PolySix%40yahoogroups.com> ] On
Behalf Of

> traxus12
> Sent: Wednesday, August 07, 2013 5:02 AM
> To: PolySix@yahoogroups.com <mailto:PolySix%40yahoogroups.com>
> Subject: [PolySix] Re: Help! Repairing a Polysix with burst battery (sound
> demo + photos!)
>
>
>
>
>
> Sorry, some of my formatting didn't make it through to the final post. I
> meant to include these.
>
> sound demo:
> https://soundcloud.com/ocguitar/korg-polysix-death-sounds
>
> Bank D and Program 4 constantly illuminated:
> http://imgur.com/TFEPUPB
>
> Thank you! Any advice would be appreciated.
> -Steve
>
> --- In PolySix@yahoogroups.com <mailto:PolySix%40yahoogroups.com>

<mailto:PolySix%40yahoogroups.com> ,

> "traxus12" <ocguitar@> wrote:
> >
> > Hello! I picked up a Korg Polysix recently and I've been trying to bring
> > it back to life. Nothing I've done has changed anything yet so I'm at a
> > bit of an impasse and I'm hoping someone out there might be able to help
> > me narrow down what I should do next. I know how to use a soldering iron
> > but I'm a complete beginner at repairing circuit board traces.
> >
> > Let me give you the symptoms.
> >
> > 1. It sounds like it's gone absolutely mental with constant oscillation
> > and other insanity going on from the moment I power it up.
> > 2. The Bank D and Program 4 buttons are constantly illuminated after
> > powering up.
> >
> > After cleaning up most of the corrosion I could find around the battery,
> > it really didn't look as bad as I thought it might so I went ahead and
> > just installed a Lithium battery holder (using Old Crow's guide) and
> > tried powering up again. Nothing changed.
> >
> > After that, I went back in and removed the IC31 chip (74LS08) and tested
> > all the traces in the area with a multimeter. Every trace I tested gave
> > me a happy little beep, even the uglier looking ones that were near the
> > old battery, so I went ahead and soldered in a new socket and 74LS08
> > chip at IC31. Powered up. Nothing changed.
> >
> > Now, I'm not sure what to do. Did I miss a trace? Should I put jumper
> > wires on the ugly looking traces even if my multimeter says they're
> > conducting just fine? Should I replace the other ICs that were near the
> > battery like IC30 even if they look fine?
> >
> > I recorded a sound demo. For the first 40 seconds I don't touch a thing,
> > then I start to experiment:
> >
> >
> > Bank D and Program 4 constantly illuminated:
> >
> >
> > First sight:
> > <http://imgur.com/Wv173WQ>
> >
> > After initial cleanup:
> > <http://imgur.com/M8POlkz>
> >
> > Installed battery:
> > <http://imgur.com/Pj3kDFT>
> >
> > Replaced IC31:
> > <http://imgur.com/Nab9GYz>
> >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
>
>
>
>
> [Non-text portions of this message have been removed]
>

[Non-text portions of this message have been removed]

Haha...figures. Okay, I'll report back after doing some more poking around over the next few days. Cheers.

--- In PolySix@yahoogroups.com, "backshall1" <backshall1@...> wrote:
>
> That's a nice meter. On the Rx1 scale you should easily be able to see if
> any tracks are approaching 1 ohm, which is a sign they should be fixed. Just
> make sure it's zeroed properly. I said digital meter because most analog
> meters aren't very accurate on that low scale. If the previous owner said
> this Polysix was working fine a few years ago, then I think his definition
> of a "few" is different than mine. I would guess a decade or more.
>
> Don B.
>
>
>
> _____
>
> From: PolySix@yahoogroups.com [mailto:PolySix@yahoogroups.com] On Behalf Of
> traxus12
> Sent: Wednesday, August 07, 2013 4:25 PM
> To: PolySix@yahoogroups.com
> Subject: [PolySix] Re: Help! Repairing a Polysix with burst battery (sound
> demo + photos!)
>
>
>
>
>
> Thanks! I'll try that. Hopefully I can find the culprit. By the way, I'm
> using a Simpson 260-8XI analog multimeter.
>
> I just remembered that the previous owner mentioned it was working fine when
> he got it from his school a few years ago and it had just been sitting in
> his garage since then. So whatever went wrong happened within the last few
> years, if that's any clue.
>
> --- In PolySix@yahoogroups.com <mailto:PolySix%40yahoogroups.com> ,
> "backshall1" <backshall1@> wrote:
> >
> > That board doesn't look too bad at all. Most look much worse after a
> battery
> > leak. Unfortunately that means there is no easy way to point to the
> problem
> > without some long and tedious debugging. You will need a digital
> multimeter,
> > not just something that goes "beep", and you will need the schematics. It
> > sounds like a problem on the D0-D7 data bus coming off of IC30 and IC31
> and
> > you will need to check those traces again and actually measure the
> > resistance. Any trace more than 0.5 ohms should probably be fixed. The
> data
> > bus connects many chips together and you will need to check between each
> > chip, which is why you will need the schematics to see which pins on which
> > chips should be connected. As mentioned by Andy Jury in several old posts,
> a
> > good way to do this is to check continuity from connector CN10 to each of
> > these chips: IC 30, 31, 26, 24, 33, 28, 29, 34, 35 and CN06 on each of the
> > eight bus lines. Like I said, tedious.
> >
> > You will have to watch out for the mislabeled chip in the diagram. There
> are
> > two IC 34 in the diagram. The one beside IC 30 is actually IC 24.
> >
> >
> >
> > Don Backshall
> >
> >
> >
> > _____
> >
> > From: PolySix@yahoogroups.com <mailto:PolySix%40yahoogroups.com>
> [mailto:PolySix@yahoogroups.com <mailto:PolySix%40yahoogroups.com> ] On
> Behalf Of
> > traxus12
> > Sent: Wednesday, August 07, 2013 5:02 AM
> > To: PolySix@yahoogroups.com <mailto:PolySix%40yahoogroups.com>
> > Subject: [PolySix] Re: Help! Repairing a Polysix with burst battery (sound
> > demo + photos!)
> >
> >
> >
> >
> >
> > Sorry, some of my formatting didn't make it through to the final post. I
> > meant to include these.
> >
> > sound demo:
> > https://soundcloud.com/ocguitar/korg-polysix-death-sounds
> >
> > Bank D and Program 4 constantly illuminated:
> > http://imgur.com/TFEPUPB
> >
> > Thank you! Any advice would be appreciated.
> > -Steve
> >
> > --- In PolySix@yahoogroups.com <mailto:PolySix%40yahoogroups.com>
> <mailto:PolySix%40yahoogroups.com> ,
> > "traxus12" <ocguitar@> wrote:
> > >
> > > Hello! I picked up a Korg Polysix recently and I've been trying to bring
> > > it back to life. Nothing I've done has changed anything yet so I'm at a
> > > bit of an impasse and I'm hoping someone out there might be able to help
> > > me narrow down what I should do next. I know how to use a soldering iron
> > > but I'm a complete beginner at repairing circuit board traces.
> > >
> > > Let me give you the symptoms.
> > >
> > > 1. It sounds like it's gone absolutely mental with constant oscillation
> > > and other insanity going on from the moment I power it up.
> > > 2. The Bank D and Program 4 buttons are constantly illuminated after
> > > powering up.
> > >
> > > After cleaning up most of the corrosion I could find around the battery,
> > > it really didn't look as bad as I thought it might so I went ahead and
> > > just installed a Lithium battery holder (using Old Crow's guide) and
> > > tried powering up again. Nothing changed.
> > >
> > > After that, I went back in and removed the IC31 chip (74LS08) and tested
> > > all the traces in the area with a multimeter. Every trace I tested gave
> > > me a happy little beep, even the uglier looking ones that were near the
> > > old battery, so I went ahead and soldered in a new socket and 74LS08
> > > chip at IC31. Powered up. Nothing changed.
> > >
> > > Now, I'm not sure what to do. Did I miss a trace? Should I put jumper
> > > wires on the ugly looking traces even if my multimeter says they're
> > > conducting just fine? Should I replace the other ICs that were near the
> > > battery like IC30 even if they look fine?
> > >
> > > I recorded a sound demo. For the first 40 seconds I don't touch a thing,
> > > then I start to experiment:
> > >
> > >
> > > Bank D and Program 4 constantly illuminated:
> > >
> > >
> > > First sight:
> > > <http://imgur.com/Wv173WQ>
> > >
> > > After initial cleanup:
> > > <http://imgur.com/M8POlkz>
> > >
> > > Installed battery:
> > > <http://imgur.com/Pj3kDFT>
> > >
> > > Replaced IC31:
> > > <http://imgur.com/Nab9GYz>
> > >
> > >
> > >
> > >
> > > [Non-text portions of this message have been removed]
> > >
> >
> >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
>
>
>
>
> [Non-text portions of this message have been removed]
>