Intel PCA-6175 B.13 External Speaker (CN3)

54 PCA-6175 User's Manual
B.13 External Speaker (CN3)
The CPU card has its own buzzer. You can also connect it to the
external speaker on your computer chassis.
Table B-13: External speaker (CN3)
Pin Function
1 +5 VCC
2 GND
3 Internal buzzer
4 Speaker out