Vintage Synth Repair

>When I pull the upper manual's '8 slider to max, the '8 and '16 flutes
>on the lower manual are totally distorted and noisy. I opened the back
>cover to start looking at the problem, and I basically see that there's
>a flat cable going from the drawbar to the main sound board, a
>multiresistor and a diode for every bar, then on the right to it there
>are 6 similar small circuits made of a big electrolytic cap and two
>transistors, marked as #1, #2, #3, #4, #5 and #6. I wonder where should
>I look at...? could it be a bad divider chip ? what circuits should I
>check ? is there a seperate circuit for each bar of the 9 bars ?... or
>an oscillator ?

You should suspect a divider chip when the same note in each octave is 
having a problem.  In your case it sounds more like the mixing circuitry- 
you could try signal injection or something to see what section of the 
circuit introduces the distortion.

_________________________________________________________________
Get FREE company branded e-mail accounts and business Web site from 
Microsoft Office Live 
http://clk.atdmt.com/MRT/go/mcrssaub0050001411mrt/direct/01/