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Chapter 4: Motherboard Connections
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.
Power Fail LED
Pin Definitions (JF1)
Pin# Definition
5
3.3V
6
PWR Supply Fail
Information LED (OH/Fan Fail/PWR Fail/UID LED)
The Information LED (OH/Fan Fail/PWR Fail/UID LED) connection is located on pins 7 and
8 of JF1. The LED on pin 7 is active when the UID switch on the rear I/O panel is pressed.
The LED on pin 8 provides warnings of overheat, power failure, or fan failure. Refer to the
tables below for more information.
Information LED-UID/OH/PWR Fail/Fan Fail LED
Pin Definitions (Pin 7 & Pin 8 of JF1)
Status
Description
Solid red
An overheat condition has occurred. (This may be caused by cable congestion).
Blinking red (1Hz)
Fan failure: check for an inoperative fan.
Blinking red (0.25Hz)
Power failure: check for a non-operational power supply
Solid blue
Local UID is activated. Use this function to locate a unit in a rack mount
environment that might be in need of service.
Blinking blue (300 msec)
Remote UID is on. Use this function to identify a unit from a remote location that
might be in need of service.
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 LAN port 2 is on pins 9 and 10. Attach the NIC LED cables here to
display network activity. Refer to the table below for pin definitions.
LAN1/LAN2 LED
Pin Definitions (JF1)
Pin# Definition
9
NIC 2 Activity LED
11
NIC 1 Activity LED
