Discussion about the Korg PolySix synthesizer

Make sure the op-amp that is buffering the output of the mux is still
behaving like a an op-amp! Also, do make sure you are in ŒManual¹ mode
before measuring these voltages....

Cheers,
A


On 06/01/2011 16:35, "radek" <radek.tymecki@op.pl> wrote:

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> hmmm.... intensity wasn't vary'ing when i was checking pin 1. when it was on 0
> it was 0.5 v when it was set on 10 voltage was 0.01 v or sth like that...
> 
> --- In PolySix@yahoogroups.com <mailto:PolySix%40yahoogroups.com> , Andrew
> Jury <andy@...> wrote:
>> >
>> > Hi Radek,
>> > 
>> > Seems that the KLM-367 is not the issue. BTW the intensity voltage should
>> > vary from ­5V (0) to +5v (10). Next turn to the KLM-368 and check the
>> switch
>> > input buffer op-amps (IC23) and then the quad bilateral switch IC14. One
>> > thing to note. I have had various NE571 compander chips fail on these board
>> > before which cause numerous and amusing effects of there own!
>> > 
>> > Let us know how you get on.
>> > 
>> > Cheers,
>> > Andy
>> > 
>> > 
>> > On 06/01/2011 10:40, "radek" <radek.tymecki@...> wrote:
>> > 
>>> > >  
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>>> > >  
>>> > >    
>>> > > 
>>> > > Hi there!
>>> > > 
>>> > > pin 1, 10 and 11 went high. also voltage on pin 1 of ic16 changed when i
was
>>> > > turning speed knob.
>>> > > 
>> > 
>> > 
>> > 
>> > [Non-text portions of this message have been removed]
>> >
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