Discussion about the Korg PolySix synthesizer

No, it isn't related with the speed of the MG. Once I repaired another KLM-367A board which produced a high speed modulation in the sound, I replaced IC30 and the problem was solved. But this time I've replaced IC30 and IC31 and the slow modulation remains. All other functions are ok.

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El lun, 10/8/15, backshall1@bellsouth.net [PolySix] <PolySix@yahoogroups.com> escribió:

 Asunto: Re: [PolySix] VCOs slightly modulated due to battery board malfunction
 Para: PolySix@yahoogroups.com
 Fecha: lunes, 10 de agosto, 2015 20:32
 
 
  
 
 
 
   
 
 
     
       
       
       
 
 
 
 Does it change with the MG speed control or does it
 seem unrelated to the 
 MG?
 Don B.
 
 
  
 
 From: mailto:PolySix@yahoogroups.com
 
 Sent: Monday, August 10, 2015 2:15 PM
 To: PolySix@yahoogroups.com
 
 Subject: [PolySix] VCOs slightly modulated due
 to battery board 
 malfunction
  
  
 
 
 Hi again. This time I have a Polysix whose VCOs are
 always modulated by a 
 very slow sine or triangle wave. Of course all modulation
 controls in the panel 
 and mod wheel are at zero value. If I change the battery
 board using a good one, 
 the modulation disappears, so it is clearly a problem of the
 KLM-367A. Do you 
 know what parts should I check?. Thank you for your help.
 
 Kind 
 regards
 
 Manuel
 
 
 
     
      
 
     
     
 
 
 
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