Supermicro A+ AS-4023S-TRT User Manual page 51

Power Fail LED
The Power Fail LED connection is located on pins 5 and 6 of JF1. Refer to the table below
for pin definitions.
OH/Fan Fail Indicator
The Overheat (OH) / Fan Fail LED is located on pin 8 on the front control panel (JF1). When
this is on, it indicates that there is a system overheat or the internal fan(s) have failed.
UID LED Indicator
A Unit Identifier (UID) switch and UID LED are located on the I/O backpanel, one UID LED
indicator header is located on JF1. The rear UID LED (UID LED) is located next to the UID
switch. The front UID LED is located on pins 7 & 8 on the front control panel (JF1). When
you press the UID switch, both rear and front UID LED indicators will be turned on. Press the
UID switch again to turn off the LED indicators. Use this UID Indicator system to 'mark' the
system, so the system can be easly identified whether on the front or back (e.g., a system
rack with multiple units installed).
Note: UID can also be triggered via IPMI on the serverboard. For more information on IPMI,
please refer to the IPMI User's Guide posted on our website at http://www.supermicro.com.
OH/Fan Fail/UID
Pin Definitions (JF1)
Pin# Definition
7 UID Signal
8 OH/Fan Fail
NIC1/NIC2 (LAN1/LAN2)
The NIC (Network Interface Controller) LED connection for LAN port 1 is located on pins 11
and 12 of JF1, and the LED connection for LAN Port 2 is on Pins 9 and 10. Attach the NIC
LED cables here to display network activity.
Chapter 4: Motherboard Connections
Power Fail LED
Pin Definitions (JF1)
Pin# Definition
5 3.3V
6 PWR Supply Fail
LAN1/LAN2 LED
Pin Definitions (JF1)
Pin# Definition
9 NIC2 Activity LED
10 NIC2 Link LED
11 NIC1 Activity LED
12
NIC1 Link LED
51
UID LED
Status
Color/State Status
Blue: On Unit Identified