Quoted from Jkush18:I can’t seem to get the sound board to reset any tips? I have a logic probe arriving today.
Start easy: Check your 5v. If it's even slightly high, the sound board will have booting issues.
Then check the Aux Power Supply to make sure it's delivering a proper 12 volts to the sound board. This 12 volts is generated from the solenoid voltage, so double check your fuses.
If you're certain you don't have a voltage issue, and you're absolutely certain it's not the connector (A1J5) dig out the logic probe for some fun:
Z13 on the driver board sends the sound call signals to the soundboard. Grab your logic probe and probe the pins. In attract mode, it should test: Pin 1: high, Pin 2: low, Pin 3: High, Pin 4: Low (this pattern continues across all pins).
Moving farther upstream: Z27 and Z31 on the MPU board feeds signals to the driver board to generate sound call information. Again, logic probe the pins. In attract mode the logic levels should be:
Z27
Pin 1: High
2: low
3: high
4: low
5 high
6: low
7: low
8: low
9: blank (no signal, neither high nor low)
10: low
11: high
12: low
13: high
14: high
Z31 (which is a SN7408N)
1-7: all low
8-13: all low
14: high