Hey guys,
So I acquired I bit of a beater High speed for the Barcade here in town, After giving up on the MPU and ordering a nice shiny new one from Rottendog I began to realize the Background sounds are always on. No matter what I put into settings such as attract sound or turning the pot on the inside of the cabinet the background buzz music sound is always there. Always on and always the same volume. The voice and sound are affected by the volume pot. But background is not. 12v out of the power supply and logic lines are testing clean. 4.99 on 5v outlet. My manual is missing the last quarter of pages I believe as the back cover is missing and I cannot find the background sound board schematic. If anyone has any clues or thoughts let me know!
Thanks!