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Chapter 4: Motherboard Connections
Figure 4-1. JFP1 Control Panel Pins
Control Panel
JFP1 contains header pins for the front control panel connections. All JFP1 wires have been
bundled into a single cable to simplify this connection. Make sure the red wire plugs into pin
1 as marked on the motherboard. The other end connects to the control panel PCB board.
Reset/UID Button
Fail LED_N (OH/FF/PF)
LAN-1 Activity LED (Aggregate all LAN)
Standby LED_N
P3V3_STBY
I2C Data
Ground
P5V_USB
P5V_USB
Ground
Power Button
UID LED_N
LAN-2 Activity LED
HDD Activity LED
Power/RoT LED_N
Ground
I2C Clock
Power Fail LED_P
P5V_USB
Power Fail LED_N
19 20
1 2
Power Button and BMC/BIOS Status LED Button
The Power On and BMC/BIOS Status LED button is connected to Pin 1 of the header JFP1.
status.
Reset Button/Front UID Switch
Depending on the JRU1 settings, the button either resets the BMC or toggles the UID LED.
See the JRU1 description for details. The button is connected to Pin 2 of JFP1.
UID LED
Fail LED (Information LED)
The Fail LED connection is Pin 4 of JFP1. It provides stimulus to the Information LED that
indicates overheating, fan failure, and power failure. A description of the Information LED can
be found in Chapter 1.
LAN1/LAN2 (NIC1/NIC2)
The NIC (Network Interface Controller) LED connection for LAN Port 1 is Pin 6, and for LAN
Port 2 is Pin 5. When this LED is blinking green, it indicates LAN activity.
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