I decided to try to fix my Centaur's sound bug again tonight, at this point I boldly jumpered FF on the squawk and talk board to bypass the Say it Again board and voila, I have sound and speech.
Looking at the schematic, I notice that (on the schematic) pins 7 and 8 on the squawk and talk connector J2 appear to join together, and then mutually go to both pins 1 and 2 on J2 of the Say it Again Board.
However, my wires for this part of the circuit do not join together, when someone was creating this custom looking harness perhaps they made an error.
You might ask yourself, why not just connect these and see what happens? The schematic can't be wrong? As I have documented previously in this thread the wiring schematic seems pretty far off in regards to this area in my copies of the digital of the Centaur manual. If I blindly followed it I might have exploded my game at this point.
So, can someone please check to see the connector that goes to J2 on both the S&T and the Say it Again Board has continuity between pins 7-8 (S&T) and 1-2 on the Say it Again board.
Here are some photos of mine, I hope it is wired wrong and this is what has been bugging me...
centaur harness far.JPG
centaur closeup.JPG