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Subject: Re: [PolySix] Re: P6 MG Oddity

From: <backshall1@bellsouth.net>
Date: 2018-03-01

The leakage from MG to VCO on battery damaged boards is well known. It is usually between the board traces that go to pin 2 (VCO mod) and pin 1 (LFO output) on CN06. Some people have cut the trace at both ends from pin 2 over to R9 (10Kohm) and wired around this away from the board. Sometimes it is better to remove the wire for pin2 from CN06, unsolder one end of R9, and connect a wire from the blue wire over to R9, bypassing the board completely. This is easy to try without doing anything pemanent, so you can see if it is going to work. You just have to push the little tab to remove the female connecter and blue wire from pin 2 location on CN06.
Don B.
 
Sent: Thursday, March 1, 2018 3:39 PM
Subject: [PolySix] Re: P6 MG Oddity
 
 

Hi SynthGuy,

 
It is 100% a fault, usually the MG modulation is exclusively VCO, VCF or VCA.
 
The only way that a working P6 would have multiple MG destinations is by using the Mod Wheel to introduce some VCO Modulation.

I imagine the one I am having trouble with is the victim of battery leakage and even though it has got a cloned KLM board I expect that the original owner may have transplanted damaged components to it from the original board.

Good luck, there are some really kind and helpful guys on here willing to help out.

Jim