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

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Subject: RE: RE: no output except static and clicks!

From: <chipaudette@yahoo.com>
Date: 2013-09-08

 

There are a bunch of reasons why a button won't appear to work: 


(1) is the button itself working, 

(2) are the traces between the button and the microcontroller working, 

(3) is the microcontroller that's scanning all of the buttons working, 

(4) is the microcontroller outputing the correct signals in response to the button being pressed, 

(5) is the synth correctly acting on the microcontroller's commands


It's definitely easiest to start with (1). Turn off your synth.  Open it up.  Find the part of the PCB holding the button in question (the Arp button?).  Take your digital multimeter, set it for measuring resistance, and measure the resistance across the leads of the button.  It should be high (or infinite) resistance when the button is not pressed.  When you press the button, the resistance should go to zero.

If you don't see this behavior, you might need to replace your button.  If you decide that this is the best course, you can check-out my page that describes the process in detail:

http://synthhacker.blogspot.com/2013/06/polysix-replacing-push-button.html

If the button seems to work OK, you'll need to start working down through the rest of the debugging list at the top.

Good luck!

Chip

--- In polysix@yahoogroups.com, <wbkennedy1@...> wrote:

Is there a way to test if the buttons are messed up or if its a larger problem? nothing happens when I push the arpegiator button..