Hey guys,

I know this is a old post but I have been working on a Contact project pin I recently picked up and have a sound question.
The mpu and driver board have been repaired and the games fires right up. So here's the sound question I have. First off I had a problem with the sound just stopping in the middle of a game. The weird thing was it would quit while using the flippers. I was able to track it down to one flipper and I found it had a broken diode connection on the coil. Remaking the connection solved the sound dropping out but as to why, I don't know. Any way, while testing the sound card, I was able to trigger game sounds by grounding pins 2, 3, 4, and 5 but nothing on pin 8 as shown on the drawings.

So I was wondering can someone confirm whether there should be sound generated on pin 8 (sol 13)? I don't want to start looking for a problem that might not exist. BTW, I do have the correct sound rom installed.

Thanks!