Vintage Synth Repair

--- In vintagesynthrepair@yahoogroups.com, "thirteentech" <thirteentech@...> wrote:
>
> Probably the top CA3046 has failed on the VCO board. You can swap the 2 of them to see 

No, i bought new chips and the problem is the same. What´s with the OpAmps 741? Shall i 
change them? Some of they have a red dot - what means this?
By the way: there are really 4 electrolyt caps on board: c10 (thats OK) and c11, c12 and c13. 
This last three should be tantalum caps, but they are not. So what - the synth worked with 
this caps.

But now i am really helpless.....is there anybody with a beautiful idea??
greetings
Martin