[sdiy] Re: [AH] broken mc-202

[Sean Ellis]

I'll compare it to my 2 202s if you take some photos. It looks like there 
were 2 factory revisions done to the boards and both of mine are late 
models.

I suspect the envelope problems are related to dirty sliders, I had a very 
similar issue when my "mint condition" one arrived. You can desolder them 
and carefully take them apart and clean the resistive track. I also bought a 
set of replacement sliders from Technology Transplant/ Chip for Brains off 
ebay but havent had to install them yet.


----- Original Message ----- 
From: "Danjel van Tijn" <danjel at gmail.com>
To: "synthdiy DIY" <synth-diy at dropmix.xs4all.nl>; "analogue list" 
<analogue at hyperreal.org>
Sent: Thursday, July 09, 2009 7:29 AM
Subject: Re: [AH] broken mc-202


>I currently have an old (battered) but functional mc-202 that I opened
> up to compare to this new one. I was suprised that they they have
> different layouts (so different revs?) and this new one seems to have
> a bunch of mods since there are some traces cut. Now I am not sure if
> the mod was never succesful (and I am not clear what it was supposed
> to do) or if a component like one of the sliders was broken.
>
> Also I was wrong from my initial tests and the adsr is not working
> properly at all (all parts of it). The sliders make changes but not
> what one would expect.
>
> argh!!!
>
> I think I will post photos to see if that offers any clues to savvy
> individuals....
>
> On Wed, Jul 8, 2009 at 5:54 PM, <Vco3 at aol.com> wrote:
>> HI I have seen that with a bad or broken solder connection on the release
>> slider or bad release slider.. good luck analog-jeff
>>
>