Supermicro SuperWorkstation SYS-531AD-I User Manual page 50

Speaker Header
On the JD1 Header, pins 3 and 4 are used for the internal speaker. Close pins 3 and 4 with
a cap to use the onboard speaker. If you wish to use an external speaker, close pins 1-4 with
a cable. Refer to the table below for pin definitions.
Power LED Header
An onboard Power LED header is located at JLED1. This Power LED header is connected
to the Front Control Panel located at JF1 to indicate the status of system power. Refer to the
table below for pin definitions.
I/O Cover LED Board Connector
JLED_IO is a 4-pin connector to connect to the LED board pre-installed inside the I/O cover.
Refer to the table below for pin definitions.
Speaker Header
Pin Definitions
Pin# Definition
3-4 Internal Speaker
1-4 External Speaker
Power LED Header
Pin Definitions
Pin# Definition
1 VCC / POWER LED (+) in JF1
2 POWER LED (-) in JF1
3 POWER LED (-) in JF1
I/O Cover LED Board Connector
Pin Definitions
Pin# Definition
1 VCC
2 NC
3 NC
4 Ground
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Chapter 4: Motherboard Connections