2-5
Safety Information and Technical Specifi cations
Explanation of Jumpers
To modify the operation of the backplane,
jumpers can be used to choose between
optional settings. Jumpers create shorts
between two pins to change the function
of the connector. Pin 1 is identifi ed with
a square solder pad on the printed circuit
board.
Note: On two pin jumpers, "Closed" means
the jumper is on and "Open" means the
jumper is off the pins.
Connector
Pins
Jumper
Setting
3 2 1
3 2 1
Jumper Settings
Jumper Jumper Settings Note
JP18
Open: Enabled
Closed: Disabled
Buzzer Reset*
JP29
Open: Default
Closed: Reset
MG9072 Chip Reset
*The buzzer sound indicates that a condition requiring immediate attention has
occurred.
The buzzer alarm is triggered by the following conditions:
Hard drive failure1.
Fan failure2.
System temperature over 45º Celsius.3.
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