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Subject: Re: [korg_mono-poly] ...and all of the sudden

From: chad imes <likeandrot@yahoo.com>
Date: 2010-05-27

it's the PCB that's corroded somehow -like the previous owner spilt a soft drink on it or something?

Soooo, is it possible to check these things using a DMM?  0_o  That's all I got.

thanks again,
chad



From: Florian Anwander <fanwander@mnet-online.de>
To: korg_mono-poly@yahoogroups.com
Sent: Thu, May 27, 2010 8:39:38 PM
Subject: Re: [korg_mono-poly] ...and all of the sudden, no sound!

 

Hi Alan

> From your description it sounds like you filter chip SSM2044 may have
> gone.
first he should check whether there is a signal at pin 1 (input) of the
SSM2044
Also it is worth checking the four ICs 2033 at pin 8, 3 and 12 whether
there is a signal.

> mean it seems that the rubber contact has corroded or the PCB contact?
> You night find the rubber strips on ebay. same type as in the polysix
> and another few keyboards. as for finding a complete keyboard PCB that
> might be more tricky.
check also http://www.oldcrows.net/~oldcrow/synth/korg/polysix/keyclean.html

If the contacts don't work ever, then maybe also some of the diodes in
the keyboard matrix might have died.

Florian