Discussion about the Korg PolySix synthesizer

The layouts are available on the web.   You should be able to 
see what's happening with just a voltmeter.
With a 3.9V zener and 120 ohm to ground, you should get3.9V across the zener, roughly, and 1.1V to ground.

     Bob

      From: "tuk88@rocketmail.com [PolySix]" <PolySix@yahoogroups.com>
 To: PolySix@yahoogroups.com 
 Sent: Friday, January 2, 2015 12:35 PM
 Subject: Re: [PolySix] Re: Non-working attenuator
   
    I've got 3.35 V on pin 2 and 5V on pin 3. Normally, that works fine. But at the output, 0V. So I think that the LM393 is brown.

Howether, I'm looking for this strange voltage on the input 2 of IC5. I think there is a mistake on the Clone PCB. Because the voltage divider looks like to works fine.

I will contact the PCB maker to have the layout picture to check where the trouble come from.

I'll keep you in touch

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