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Chapter 2: Installation
UID LED Indicator
The UID (Unit Identier) LED connection is located on pins 7 and 8 of JF1. The UID LED
indicators provide easy identication of a system unit that may be in need of service.
UID LED Status
Pin# Denition
7 +3.3V Stby
8 NMI
Flashing Fan Fail
1. Power Supply Fail
2. UID LED
3. NMI Button
Reset Button
UID LED
1
NIC1 Activity LED
Power Button
2
HDD LED
Power LED
R
Reset
3.3V Stby
3.3V Stby
3.3V Stby
3.3V Stby
Ground
Ground
X
NIC2 Activity LED
3.3V Stby
19 20
X
X
Ground
NMI
1
2
Power Supply Fail
Connect an LED cable to Power Supply Fail connections on pins 5 and 6 of JF1 to provide
warnings for a power failure. Refer to the table below for pin denitions.
Power Supply Fail Indicator
Status
Pin# Denition
5 X
6 Power Supply Fail
3
NMI Button
The NMI (Non-Maskable Interrupt) button is located on pins 19 and 20 of JF1. Refer to the
table below for pin denitions.
NMI Button
Pin Denitions
Pin# Denition
19 NMI
20 Ground