Discussion about the Korg PolySix synthesizer

Hi Jose,

So we have one Poly-61 fitted with the Korg MIDI kit at some stage in 
the UK. You now own this keyboard, it was working OK, but now DCO1 
has virtually no output. 

We'll have to put it out to the group as my knowledge of this 
instrument is not great. Can you tell me what your level of expertise 
in electronics is like? You might want to compare the output from the 
programmable interval timers (IC4/5 and IC13/14) and verify they are 
counting correctly. You might also want to measure the output from 
the DCOs starting at the VCF and working backwards. Do you have the 
KLM-476 or 508 type synth board?

If you need a copy of the scheamtic drop me a private message, but I 
must warn you my copy is not very good.

Cheers,
Andy



--- In PolySix@yahoogroups.com, "letcista" <letcista@...> wrote:
>
> Hello group.
> I'm having problems with a poly 61.
> I know this is a Polysix group but... maybe someone can help me.
> The problem is that DCO1 produces very low sound when sawtooth wave 
is 
> selected and barely no sound when one of the other two waves are 
> selected.
> DCO2 works fine as all the remaining functions.
> Any sugestions?
> Thanks in advance!
> Best regards.
> José.
> Portugal
>