
29 Chapter 4
• One voltage signal connector (connect from backplane, includes 12V,
5V, +3.3V)
• One HDD LED connector (connect from CPU card)
Output Signals:
• One LED board connector
• One LCM board connector
• One Buzzer output
Pin Definition
CN1: Auxiliary external power connector, standard mini 4-Pin power
connector
Pin 1 +12V Pin 3 GND
Pin 2 GND Pin 4 +5V
CN4: Thermal sensor (LM75) connector
Pin 1 +5V Pin 3 T_SDAT
Pin 2 T_SCLK Pin 4 GND
CN13: Voltage detect input connector
Pin 1 +5Vsb Pin 5 +5V
Pin 2 GND Pin 6 +3.3V
Pin 3 GND Pin 7 -12V
Pin 4 -5V Pin 8 +12V
CN16: Power good input
Pin 1 Power Good A Pin 2 GND
CN17: Alarm reset connector
Pin 1 ALARM RESET Pin 2 GND
CN18: LED board connector
Pin 1 GND Pin 9 Temperature Good LED
Pin 2 Power Good +5V Pin 10 Temperature Fail LED
Pin 3 Power Good +12V Pin 11 FAN Good LED
Pin 4 Power Good -5V Pin 12 FAN Fail LED
Pin 5 Power Good -12V Pin 13 N/A
Pin 6 HDD_1 Pin 14 Power Good +3.3V
Pin 7 Power Good LED Pin 15 Power Good +5Vsb
Pin 8 Power Fail LED
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