ASRock AD2550-ITX manual Chassis Speaker Header Please connect the chassis

PLED (System Power LED):

Connect to the power status indicator on the chassis front panel. The LED is on when the system is operating. The LED keeps blinking when the sys- tem is in S1 sleep state. The LED is off when the system is in S3/S4 sleep state or powered off (S5).

HDLED (Hard Drive Activity LED):

Connect to the hard drive activity LED on the chassis front panel. The LED is on when the hard drive is reading or writing data.

The front panel design may differ by chassis. A front panel module mainly consists of power switch, reset switch, power LED, hard drive activity LED, speaker and etc. When connecting your chassis front panel module to this header, make sure the wire assignments and the pin assign-ments are matched correctly.

Chassis Speaker Header	Please connect the chassis
(4-pin SPEAKER 1)	speaker to this header.
(see p.11 No. 14)
Chassis Fan Connector	Please connect the fan cable
(3-pin CHA_FAN1)	to the fan connector and
(see p.11 No. 5)	match the black wire to the
	ground pin.

CPU Fan Connector

GND

(3-pin CPU_FAN1)+12V

CPU_FAN_SPEED

(see p.11 No. 3)

Please connect the CPU fan cable to the connector and match the black wire to the ground pin.

ATX Power Connector		12	24	Please connect an ATX power
(24-pin ATXPWR1)				supply to this connector.
(see p.11 No. 7)
		1	13
	Though this motherboard provides 24-pin ATX power connector,				12	24
	it can still work if you adopt a traditional 20-pin ATX power supply.
	To use the 20-pin ATX power supply, please plug your
	power supply along with Pin 1 and Pin 13.
			20-Pin ATX Power Supply Installation		1	13

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