User`s manual

33 Chapter 3 Alarm Board
There is a system LED indicator on the front door. See Figure 3.4 for the
connection.
Pin Definition
CN1: LED Board Connector
Pin 1: GND Pin 2: +5V Signal
Pin 3: +12V Signal Pin 4: -5V Signal
Pin 5: -12V Signal Pin 6: HDD 1
Pin 7: Power Good Signal Pin 8: Power Fail Signal
Pin 9: Temperature Good Signal Pin 10: Temperature Fail Signal
Pin 11: Fan Good Signal Pin 12: FAN Fail Signal
Pin 13: HDD 2 Pin 14: +3.3V Signal
Pin 15 : Option
The USB and PS/2 keyboard are behind the door. See Figure 3.5 for the
connection.
Figure 3.4: LED layout