Archive of the former Yahoo!Groups mailing list: Discussion about the Korg PolySix synthesizer

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Subject: Re: [PolySix] Re: Key assign mode issue

From: mpe1969@tpg.com.au
Date: 2015-05-05

I have just added three more photos. 
Results from tonight. 
IC 7 and IC8 seem to be ok. (inverting voltages) Except pin 13 on ic7 voltage present butis a little jumpy across oscilloscope.
IC19 pin 7 looks similar to the wave on ic9 pin1 (see photos). Pushing keys does not influence the voltage.
IC9 pin1,2,6,7 all look the same (see photo1). Pin 5 has a very distorted variation of pin1 (see photo). 
(pin4 -15, pin8 15+.
I have added oscilloscope setting to photos.

I'm wondering if ic9 is faulty.
Thanks again (learning curve going on over here).
Hope these photos are a little more informative.