Discussion about the Korg PolySix synthesizer

Hi.

Check my last P6 repair post. Both Bank B, preset 2 and preset 6 leds
are going to IC30's leg number 6.

Replace IC30 and clean any corrosion which may be found underneath.

I would also use the original 74LS08 (74HC08 seems to works too).

;)







--- In PolySix@yahoogroups.com, "essboyer" <sean@...> wrote:
>
> Well, after a bit more troubleshooting, I discovered another bad trace
> from the processor to somewhere. Once I repaired that, the programmer
> started working *almost* properly. The Bank B and Program 2 lights
> ALWAYS stay on, but I can select the other banks and programs no
> problem now. Some of the programs appear to be blank or possibly not
> working, but at least I'm getting somewhere!
> 
> My next big issue seems to be that the sub oscillator, and octave
> selector switch don't seem to work. Sometimes the waveform selector
> will work, and other times not. All the traces seem to be good on the
> control board... I've cleaned the switches with contact cleaner, and
> still nothing. 
> 
> Are these controls related to the corrosion-damage-zone?
> 
> I have not yet replaced the topmost 7408 nor the resistor array, as
> they seem to be okay. Maybe I will do the 7408 just to be sure.
>