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Subject: Re: [korgpolyex] Problem with my poly800 reverse keys edition... :/

From: Michael Hawkins <korgpolyex800@...>
Date: 2011-08-14

-4.42 is too far out of spec. You will need to get that to -4.9 to -5.1.


From: bruno lhuissier <bruno.lhuissier@...>
To: korgpolyex@yahoogroups.com
Sent: Saturday, August 13, 2011 12:48 PM
Subject: Re: [korgpolyex] Problem with my poly800 reverse keys edition... :/

 
The low to high swooshing sound is the analog to digital sample and hold circuits discharging. Which indicates that the A2D multiplexing is not occurring.

So like I said, check the power rails first. Then let us know what you find.



I check the power rails:

The +5V is good (I recalibrate at +5V)

I ve got -4,42 V for the negative power