Discussion about the Korg PolySix synthesizer

Hi Ullrich,

the 7408 isn\ufffdt the problem. If i remove the 5114 RAM and use the 764HC08
Series, then the Polysix works without Patch-Key-LED flicker. If i don\ufffdt
remove the RAM and turn the Variable Resistor right-located on the Power
Supply, then the Buttons will also stop to flicker, but only unless i
don\ufffdt turn any Knobs. If i turn a Knob or press six Keys on the
Keyboard, then the Keys will start to flicker again and i hear some
distorted sound on my Speakers (somewhat like a bad connected audio
cable). 

The newest problem is that my Octave and Wavefom-Switches doesn\ufffdt work
any longer,the Poly produces only PW-Sound at 4". The blue Cable and
their connectors on the Knob-Board and the KLM-367 are ok. I had the
same problem a while ago, but it only happened when the RAM was removed,
now it happens when the RAM is removed -and- when it is inserted. I
strongly believe that the RAM is now definitively defect, so i have to
order a replacement part and try it again.

Thanks!

Stef







Ullrich Peter <peter.ullrich@kapsch.net> schrieb am 26.01.2004,
13:04:41:
> Hi Stef!
> 
> >i have two questions: First, should it be a problem to use 74HC08/7408
> >instead of the original 74LS08? I\ufffdve figured out strange problems with
> >using them (specially with IC31).
> 
> The HC-Parts have CMOS logic levels...
> If you use HCT-parts that have TTL levels you should have luck...
> 
> Ciao
> Peter
> 
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