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Chapter 4: Motherboard Connections
Overheat (OH)/Fan Fail
Connect an LED cable to OH/Fan Fail connections on pins 7 and 8 of JF1 to provide warnings
for chassis overheat/fan failure. This connection will also serve as an IPMI UID indicator as
a blue LED. Refer to the table below for pin definitions.
OH/Fan Fail Indicator
Pin Definitions (JF1)
Pin#
Definition
Off
Normal
On
Overheat
Flashing
Fan Fail
OH/Fan Fail LED
Pin Definitions (JF1)
Pins
Definition
7
Vcc/Blue UID LED
8
OH/Fan Fail LED
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 NIC
LED cables to NIC1 and NIC2 LED indicators to display network activities. Refer to the table
below for pin definitions.
LAN1/LAN2 LED
Pin Definitions (JF1)
Pins
Definition
9/11
+3.3V Stby
10/12 NIC Activity LED
HDD LED
The HDD LED connection is located on pins 13 and 14 of JF1. Attach a cable here to show
hard drive activity status. Refer to the table below for pin definitions.
HDD LED
Pin Definitions (JF1)
Pins
Definition
13
+3.3V Stby
14
HD LED
