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Chapter 4: Motherboard Connections
Reset Button
Pin Definitions (JF1)
Pin#
Definition
3
Reset
4
Ground
Power Button
Pin Definitions (JF1)
Pin#
Definition
1
Signal
2
Ground
Power Button
The Power Button connection is located on pins 1 and 2 of JF1. Momentarily contacting both
pins will power on/off the system. Refer to the table below for pin definitions.
Reset Button
The Reset Button connection is located on pins 3 and 4 of JF1. Momentarily contacting both
pins will reset the system. Refer to the table below for pin definitions.
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-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.
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.