ASRock B250M Pro4 Quick Installation Guide - Page 23
²ront Panel Audio Header - manual
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B250M Pro4 Front Panel Audio Header (9-pin HD_AUDIO1) (see p.1, No. 24) GND PRESENCE# MIC_RET OUT_RET 1 OUT2_L J_SENSE OUT2_R MIC2_R MIC2_L This header is for connecting audio devices to the front audio panel. 1. High Definition Audio supports Jack Sensing, but the panel wire on the chassis must support HDA to function correctly. Please follow the instructions in our manual and chassis manual to install your system. 2. If you use an AC'97 audio panel, please install it to the front panel audio header by the steps below: A. Connect Mic_IN (MIC) to MIC2_L. B. Connect Audio_R (RIN) to OUT2_R and Audio_L (LIN) to OUT2_L. C. Connect Ground (GND) to Ground (GND). D. MIC_RET and OUT_RET are for the HD audio panel only. You don't need to connect them for the AC'97 audio panel. E. To activate the front mic, go to the "FrontMic" Tab in the Realtek Control panel and adjust "Recording Volume". Chassis Fan Connectors (4-pin CHA_FAN1) (see p.1, No. 2) (4-pin CHA_FAN2) (see p.1, No. 11) FAN_SPEED_CONTROL 4 FAN_SPEED 3 FAN_VOLTAGE 2 GND 1 GND FAN_VOLTAGE_CONTROL FAN_SPEED FAN_SPEED_CONTROL Please connect fan cables to the fan connector and match the black wire to the ground pin. CPU Fan Connectors (4-pin CPU_FAN1) (see p.1, No. 3) (3-pin CPU_FAN2) (see p.1, No. 4) FAN_SPEED This motherboard pro- FAN_VOLTAGE_CONTROL GND FAN_SPEED_CONTROL vides a 4-Pin CPU fan (Quiet Fan) connector. If you plan to connect a FAN_SPEED FAN_VOLTAGE GND 3-Pin CPU fan, please connect it to Pin 1-3. English 21