Support & Troubleshooting - Sound System

First, check to ensure that the amplifier box is turned on (small power button on the right side of the unit). When power is available a red light should appear. If the power switch is on and the light does not illuminate, check the power cable and make sure all power bars are plugged in and turned on.

If the room does not have a separate audio amplifier, turn up the volume and disable the mute function on the data projector.

If you are using a computer, make sure none of the audio channels are muted and turn up the master volume to approximately 2/3 level. Turn up the volume in the media player application that you are using and disable the mute feature (when applicable).

For laptops: check to ensure that the 3.5mm audio plug is in the ‘headphone/line out’ jack and not in the microphone or ‘line in’ jack.

For desktop: check to ensure that the audio cable is plugged into back of the PC in the middle (green) audio plug. Also make sure that there are no cables plugged into the front audio jacks as this will disable the rear output.

If you are playing an audio CD, try using the DVD player instead. It will produce better audio quality then the PC. If you must use the PC, disable ‘digital audio extraction’ in the windows media player options.

Laptop/Desktop PC: Make sure that that the Windows or Mac volume control is not turned up too high. If you are listening to webcast audio it may increase and decrease in quality as bandwidth changes. Scratched DVDs and audio CDs can have clicking sounds in the background if the damage is severe.

VHS: If you are using an old VHS tape it is normal for the audio to be dull sounding or to have slight flutter in the volume level. Tapes recorded using the PAL standard will have static and poor video quality – the VHS players on campus do not support this format. If there is a flickering noise, try adjusting the tracking control on the VCR remote.

VHS/DVD: Make sure the amplifier volume is not turned up too loud and that the bass and treble controls are not too high. On the setup screen, set the audio type to SAP MONO for optimal sound quality.

When the amplifier is turned on it may pick up ground noise from devices that are connected but not turned on. For example, if the microphone is not in use, turn down the volume control to prevent it from adding noise to the system.

If the laptop audio connector is in contact with a metal surface it might introduce noise to the system. Move the connector away from any conductive surface and power cables.

If you are using a laptop computer, try disconnecting the AC adapter as the battery charging process can create ground noise that would be audible over the speaker system.

If you are using a VHS tape, try adjusting the tracking to eliminate any noise that might be generated by the edge of the tape.

The most common reason for the microphone to fail is low batteries.

If the microphone has a green light, check to make sure the mute switch is not enabled. Also make sure the amplifier is turned on and the microphone volume is turned up. Make sure the receiver unit is turned on and plugged in. If the microphone still doesn’t work it may require servicing.

If not then, the batteries will need to be replaced. Spare batteries are located in the desk cabinet. When using the spare batteries, please notify the help desk to arrange for replacement.