Vintage Synth Repair

Hi Scott, I'll look at that...but it doesnt seem to be caused by a single pot...I have just sprayed every single pot...no difference. 
 
Another symptom: It shows the stored pot value on the left and the actual value on the right. One pots stored value was 31...well i started turning another pot whose stored value was 49 and as I turned it slowly the stored value would flicker back to 31..if i turned it slowly i could make it step between 31 and 49.  It's like data lines are bleeding into one another. Or like a certain mix of positions of pots confuse it....
 
It's hurting my head this one...

--- On Fri, 29/8/08, scott frye <painintheamp@...> wrote:

From: scott frye <painintheamp@...>
Subject: [vintagesynthrepair] Re: Memorymoog repair
To: vintagesynthrepair@yahoogroups.com
Date: Friday, 29 August, 2008, 12:29 AM










If the same pot is the one that's sticking ( locking up the values) Spray the heck out of it with some de-oxit.
If that doesnt work, find out which A / D lines and IC connect to THAT pot.
Is the CLK strobing that chip properly? If it's sampled back at the micro is the clock OK for the micro?
Just some thoughts w/o looking at the schema.

Problems like that also occur on the SIEL DK600 and Opera.




Scott  Frye
AudioFixation
Consumer / Pro Audio Repair
Southern VT 

"Resistance is futile but.....
Impedance is much more complex"


 













Send instant messages to your online friends http://uk.messenger.yahoo.com