ASRock H110TM-ITX R2.0 Quick Installation Guide - Page 21
pin ATX19V_IN1
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H110TM-ITX R2.0 Chassis Fan Connector (4-pin CHA_FAN1) (see p.1, No. 6) FAN_SPEED_CONTROL CHA_FAN_SPEED FAN_VOLTAGE GND Please connect fan cable to the fan connector and match the black wire to the ground pin. CPU Fan Connector (4-pin CPU_FAN1) (see p.1, No. 19) 4 3 21 GND FAN_VOLTAGE CPU_FAN_SPEED FAN_SPEED_CONTROL This motherboard provides a 4-Pin CPU fan (Quiet Fan) connector. If you plan to connect a 3-Pin CPU fan, please connect it to Pin 1-3. Internal Power Header (2-pin ATX19V_IN1) (see p.1, No. 1) This motherboard provides a 2-pin ATX 19V power connector. Consumer Infrared Module Header (7-pin CIR1) (see p.1, No. 12) CIR input +5VA Learn-in LED 1 +5VA IRTX GND This header can be used to connect the remote controller receiver. Serial Port Header (9-pin COM1) (see p.1, No. 17) RI RTS GND TXD DCD 1 NC CTS DSR DTR RXD This header supports serial port modules. Backlight Control Header (8-pin BLT_VOL1) (see p.1, No. 16) 1 1: BKLT_EN 2: BKLT_PWM 3: BKLT_PWR 4: BKLT_PWR 5: GND 8 6: GND 7: Brightness_Up 8: Brightness_Down English 19