Discussion about the Korg PolySix synthesizer

Hi Frank,

I would venture that you may have not completed your mission with the 
KLM-367. I would go back and check the tracks and function of the 
logic at IC29 and IC34. Pay special attention to the control lines 
P24 and P24. The track from the CPU port to this pin runs directly 
along the area where the battery leaks! These two chips are 4042 quad 
CMOS latches, so testing them might require the use of a logic probe.

Once you have verified this is working OK, then we can move onto the 
effects processor board, but not until!

Let us know how you get on and if you need any further help!

Cheers,
Andy



--- In PolySix@yahoogroups.com, "Dr Funk" <frank@...> wrote:
>
> I think I've finally brought my P6 back from the grave after a big
> KLM367 rewiring job, and it's sounding great!  I've followed the
> calibration procedure, and it now seems to be 100% functional, 
except
> for a complete lack of effects.  Chorus/phaser have no effect at 
all,
> and when I select Ensemble I just hear a loud repeating thumping 
noise.
> 
> I've checked CN03 from the KLM367, and pins 4, 5 and 6 measure 4.8V
> when the appropriate effect is selected, while CN03-7
> (speed/intensity) swings from -4.8V to +4.8V, depending on the front
> panel pot.  Other parts of the KLM368 (headphone & output amps) 
appear
> to be fine.
> 
> Any help would be appreciated! 
> 
> Cheers
> Frank
>