Discussion about the Korg PolySix synthesizer

Definetely not, I've double checked it. Effects off, sawtooth wave. Same slow VCOs modulation (about 5 secs per cycle) independently of the speed of the three LFOs in the Polysix. If I replace the KLM-367A the modulation disappears.

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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 20:57
 
 
  
 
 
 
   
 
 
     
       
       
       
 
 
 
 How about PWM Speed or Effects Speed? They also have
 their own LFO signal 
 that could be bleeding in somewhere.
 Don B.
 
 
  
 
 From: mailto:PolySix@yahoogroups.com
 
 Sent: Monday, August 10, 2015 2:40 PM
 To: PolySix@yahoogroups.com
 
 Subject: Re: [PolySix] VCOs slightly modulated
 due to battery board 
 malfunction
  
  
 
 
 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.
 
 --------------------------------------------
 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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