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Discussion about the Korg PolySix synthesizer

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KLM-366B Replacement

KLM-366B Replacement

2015-12-15 by atoneontail@gmail.com

Hey gang,


Just got my Polysix back from the tech, one of my voices is dead, thought it might have been the chip. And my LFO to VCO and pitch bend were not working as well. Thought it might have been a simple connection problem. But it seems that it was neither. In fact the tech said that a lot of traces were pulled out, I guess this happened when the Polysix was being fixed from a previous battery leak before I bought, and that there is still corrosion on the KLM-366B board hence my voice problem and problem with the LFO to VCO.


He suggested that I would need a new voice board, the KLM-366B. And I was hoping this group could help lead me in the right direction in finding a replacement board seeing as how they seem very hard to come by. Thanks for your time!


-Brady

Re: [PolySix] KLM-366B Replacement

2015-12-16 by Florian Anwander

Hello Brady

The battery leakage does not happen on the voiceboard, but on the CPU 
board. If traces are missing, they can be replaced by wires. Especially 
as only one voice is affected, there are only a few potential traces.

Instead of replacing the board, I'd replace the technician.

Sorry.

Florian

Re: [PolySix] KLM-366B Replacement

2015-12-16 by Dennis Matana

LOL!!! http://soundcloud.com/wifiwww.facebook.com/matanateknik                               


    On Wednesday, December 16, 2015 8:56 AM, "Florian Anwander fanwander@mnet-online.de [PolySix]" <PolySix@yahoogroups.com> wrote:
 

     Hello Brady

The battery leakage does not happen on the voiceboard, but on the CPU 
board. If traces are missing, they can be replaced by wires. Especially 
as only one voice is affected, there are only a few potential traces.

Instead of replacing the board, I'd replace the technician.

Sorry.

Florian

Re: [PolySix] KLM-366B Replacement

2015-12-16 by Bob Grieb

I was thinking the same thing yesterday.   If there is damage from the battery leak 
on the KLM-366B board, it's likely to be relatively minor, and much easier to fix than 
trying to find a whole new board.  It's the KLM-367 that takes the biggest hit.

    Bob


--------------------------------------------
On Wed, 12/16/15, Florian Anwander fanwander@mnet-online.de [PolySix] <PolySix@yahoogroups.com> wrote:
Show quoted textHide quoted text
 Subject: Re: [PolySix] KLM-366B Replacement
 To: PolySix@yahoogroups.com
 Date: Wednesday, December 16, 2015, 2:56 AM
 
 
  
 
 
 
   
 
 
     
       
       
       Hello Brady
 
 
 
 The battery leakage does not happen on the voiceboard, but
 on the CPU 
 
 board. If traces are missing, they can be replaced by wires.
 Especially 
 
 as only one voice is affected, there are only a few
 potential traces.
 
 
 
 Instead of replacing the board, I'd replace the
 technician.
 
 
 
 Sorry.
 
 
 
 Florian
 
 
 
     
      
 
     
     
 
 
 
 #yiv6752333481 #yiv6752333481 --

Re: [PolySix] KLM-366B Replacement

2015-12-16 by <backshall1@bellsouth.net>

It’s very unlikely that you will find a replacement KLM-366B, so one way or another it will have to be repaired. Are you talking about LFO to VCO and Pitch Bend problems that affect all voices or just one voice? Did the tech fix anything? Where were the traces pulled out? Which  board? Where on the KLM-366B can you see corrosion?

Don B.
Show quoted textHide quoted text
From: mailto:PolySix@yahoogroups.com 
Sent: Tuesday, December 15, 2015 6:08 PM
To: PolySix@yahoogroups.com 
Subject: [PolySix] KLM-366B Replacement

  

Hey gang,




Just got my Polysix back from the tech, one of my voices is dead, thought it might have been the chip. And my LFO to VCO and pitch bend were not working as well. Thought it might have been a simple connection problem. But it seems that it was neither. In fact the tech said that a lot of traces were pulled out, I guess this happened when the Polysix was being fixed from a previous battery leak before I bought, and that there is still corrosion on the KLM-366B board hence my voice problem and problem with the LFO to VCO. 




He suggested that I would need a new voice board, the KLM-366B. And I was hoping this group could help lead me in the right direction in finding a replacement board seeing as how they seem very hard to come by. Thanks for your time!




-Brady

Re: [PolySix] KLM-366B Replacement

2015-12-16 by atoneontail@gmail.com

Thanks to everyone for their responses thus far, I am kind of relieved to hear it might be the tech. But after closer inspection myself, it does appear there is some corrosion on the voice board. Under the specific voice that is not working, Voice 4.

To answer your questions Don:

- The LFO to VCO and Pitch Bend not functioning is affecting all Voices

-The Tech said he did not fix anything

-He specifically mentioned a trace missing/pulled from the KLM-369 board, but later mentioned he noticed a bunch had been pulled.

-He said he noticed the corrosion on the back of the KLM-366B board, specifically around Voice 4, the one that is not sounding. In a closer inspection, I noticed what could be corrosion, but I am no expert.

The picture attached is an image of the KLM-366B board, notice R136.




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