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Subject: Re: [yamahacs80] One more thing...

From: "LucidSound" <lucidsound@...>
Date: 2017-03-15

I’m keen to know where the grounds should be linked. I’m seeing the M card ground is 0.3 ohm with respect to the logic power ground, but around 2k to the +/-15V ground. I’m guessing that shouldn’t be the case?
 
Lucid.
 
Sent: Wednesday, March 15, 2017 4:03 AM
Subject: [yamahacs80] One more thing...
 
 

Hi Lucid Sound,


I remember that in the case i mentioned, some of the voltages I measured would change unexpectedly when I played up and down the keyboard, thus giving me the clue that the analog and digital systems had become "floating" relative to each other.


Kyle

jkjelec