ASRock Z77 OC Formula Quick Installation Guide - Page 40

system is in S1/S3 sleep state. The LED is off when the system is in 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 (4-pin SPEAKER 1) (see p.2, No. 23) Please connect the chassis speaker to this header. Power LED Header (3-pin PLED1) (see p.2, No. 24) 1 PLEDPLED+ PLED+ Please connect the chassis power LED to this header to indicate system power status. The LED is on when the system is operating. The LED keeps blinking in S1/S3 state. The LED is off in S4 state or S5 state (power off). Chassis, Power and MOS Fan Connectors (4-pin CHA_FAN1) CHA_FAN_SPEED +12V GND FAN_SPEED_CONTROL (see p.2, No. 37) Please connect the fan cables to the fan connectors and match the black wire to the ground pin. (3-pin CHA_FAN2) (see p.2, No. 33) (3-pin CHA_FAN3) (see p.2, No. 17) (3-pin CHA_FAN4) (see p.2, No. 49) (3-pin PWR_FAN1) (see p.2, No. 16) (3-pin MOS_FAN1) (see p.2, No. 50) 40 CHA_FAN_SPEED +12V GND GND +12V CHA_FAN_SPEED PWR_FAN_SPEED +12V GND GND +12V MOS_FAN_SPEED ASRock Z77 OC Formula Motherboard English