51
Chapter 4: Motherboard Connections
Speaker (JD1)
On the JD1 header, pins 3~4 are used for the internal speaker. Close pins 3~4 with a cap to
use the onboard speaker. If you wish to use an external speaker, attach an external speaker
to pins 6~7. See the table below for pin definitions.
Speaker Connector
Pin Definitions
Pin Setting
Definition
Pins 1~2
Power LED
Pins 6~7
External Speaker
Power SMB Header (PWRI2C)
Power System Management Bus (I2C) header monitors power supply, fan and system
temperatures. See the table below for pin definitions.
Power SMB Header
Pin Definitions
Pin#
Definition
1
Clock
2
Data
3
PWR Fail
4
Ground
5
+3.3V
