I am trying to make a minor modification to a Bally AS-2518-51 sound board for my Frontier "pin2k minus 20" project so that it can work in a Playboy, which uses an AS-2518-32. I would like to either modify the wiring harness or make a jumper on the -51 board to make this work.

In reviewing the sound board schematics for the two machines on IPDB, the 15 header pins (J1) on both boards have virtually the identical connections to/from other boards in the backbox. There is one exception that I am unclear on how to work around.

On the -51 board, pin 10 connects to A2J3-8 (transformer/bridge rectifier board) which is labeled as (Un?)-Reg +5. On the -32 board it is labeled as Not Used. One other onward connection off of the -51 board, pin 10 is A3J3-12 (solenoid driver board).

On the other wiring harness with the -32 board configuration, there is a connection from A2J3-8 to A3J3-12, but neither go to the sound board.

Can anyone provide some insight about what is the best course, or am I missing something completely?

Thanks

Thanks barakandl.

Do you foresee any problems related to running a wire, and leaving it in place within the harness, from the Solenoid Driver Board pin 12 (A3J3-12) to the sound board J1-10?

I ask as I am not certain if there could be any negative affects of running that wire when the -32 board is installed. For the -32, pin 10 is not used.

Thanks for the technical advice.