I am trying to use a Type 1 sound board in a System 7 Game. I am working on the jumper, but I'm having trouble with jumper 9. There is no place for jumper 9 on a type 1 sound board. The schematic shows (as far as I can tell - Looking at Stellar Wars Schematic) that Jumper 9 should connect pin 4 on IC9 with pin 16 on IC3 with Jumper 10.
However, on a type 2 schematic, it appears jumper 9 is connected completely differently. I'm not sure where to connect jumper 9
Can anyone help with this?