ASRock P55M Pro Quick Installation Guide - Page 24

Internal Audio Connectors (4-pin CD1) (CD1: see p.2 No. 34) Front Panel Audio Header (9-pin HD_AUDIO1) (see p.2 No. 35) CD1 This connector allows you to receive stereo audio input from sound sources such as a CD-ROM, DVD-ROM, TV tuner card, or MPEG card. This is an interface for front panel audio cable that allows convenient connection and control of audio devices. 1. High Definition Audio supports Jack Sensing, but the panel wire on the chassis must support HDA to function correctly. Please follow the instruction in our manual and chassis manual to install your system. 2. If you use AC'97 audio panel, please install it to the front panel audio header as 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 HD audio panel only. You don't need to connect them for AC'97 audio panel. E. Enter BIOS Setup Utility. Enter Advanced Settings, and then select Chipset Configuration. Set the Front Panel Control option from [Auto] to [Enabled]. System Panel Header (9-pin PANEL1) (see p.2 No. 23) This header accommodates several system front panel functions. English Chassis Speaker Header (4-pin SPEAKER 1) (see p.2 No. 21) Please connect the chassis speaker to this header. Chassis and Power Fan Connectors (4-pin CHA_FAN1) (see p.2 No. 20) (3-pin PWR_FAN1) (see p.2 No. 4) Please connect the fan cables to the fan connectors and match the black wire to the ground pin. 24 ASRock P55M Pro Motherboard