Lenovo 4157 User Manual - Page 17

1 Audio line-in connector Used to receive audio signals from an external audio device, such as a stereo system. When you attach an external audio device to your computer, connect the cable to the audio line-out connector of the device and the audio line-in connector of the computer. 2 Audio line-out connector (front speaker connector) Used to send audio signals from the computer to external audio devices, such as powered stereo speakers (speakers with built-in amplifiers), multimedia keyboards, or the audio line-in connector on a stereo system or other external recording devices. When used with 5.1 or 7.1 surround speakers, this connector should be attached to the front left and right speakers. 3 Microphone connector Used to attach a microphone to your computer when you want to record sound or if you use speech-recognition software. 4 Headphone connector Used to attach headphones to your computer when you want to listen to music or other sounds without disturbing anyone. This connector might be located on the front of the computer. 5 Audio line-out connector When used with 5.1 or 7.1 surround speakers, this (subwoofer/center speaker connector) connector should be attached to the center speaker and subwoofer. 6 Audio line-out connector (rear speaker connector) When used with 5.1 or 7.1 surround speakers, this connector should be attached to the rear left and right speakers. 7 Audio line-out connector (side speaker connector) When used with 7.1 surround speakers, this connector should be attached to the side left and right speakers. 8 Optical SPDIF (Sony Philips Digital Interconnect Format) in connector Used to receive 5.1 digital audio signals from an external device, such as a receiver or other multimedia devices, through a TOSLINK (ToshibaLink) optical cable. 9 Optical SPDIF out connector Used to send 5.1 digital audio signals from a computer to an external device, such as an amplifier or a receiver, through a TOSLINK optical cable. Chapter 3. Setting up your computer 9