Vintage Synth Repair

Just to add a caution to Scot's note (not to step on toes):

Don't use any chemicals on the rubber contacts for the keyboard.  Scott may disagree, but I think the only way I've ever seen to clean those is to remove them and wash them in warm with a little mild dish washing detergent.  Rinse them thoroughly under warm water and let them air dry.  Preferably use De-ionized water. 

--- In vintagesynthrepair@yahoogroups.com, "Scott" <painintheamp@...> wrote:
>
> 1. Make sure that the 16 pin conn from the keyboard isn't turned around.
> THAT will make it not work . This one wasn't keyed. The others were.
> 
> 2. replace all the tantalum and electrolytic caps in the power supply and the reset circuit.
> 3. The key contacts are more like calculator switch contacts made from silicone and small black proximity buttons that capacitively make the "key contact" if these are mis-aligned after cleaning , they wont work.
> 4. Spray out all the pots and switches with De-Oxit or something like it. The processor constantly scans the values of these components. If they're dirty , it gets confused.
> 
> The one I have here is all better and going home as soon as payment is made.
>