HUAWEI Bar 500 V600R019C00 Maintenance Guide

Current noise is generated when the endpoint's audio output ports are connected to audio devices, such as speakers, tuning consoles, and audio matrices.

Disconnect the endpoint's audio output ports from the audio devices. Check whether the problem is rectified.

If the problem persists, the current noise is caused by audio device or cable issues.

Replace the cables or repair the audio devices.

If the problem is rectified, check the grounding status of the audio devices and endpoint.

• If the audio devices' shells are grounded, the endpoint's shell must be grounded nearby.
• If the audio devices' shells are not grounded, the endpoint's shell does not need to be grounded either. Specifically, change the endpoint's AC three-core power supply to two-core power supply.

While the endpoint is in use during a conference, no audio is delivered from the local display device.

Perform an audio test to check whether the problem occurs at your site or a remote site.

If no audio is delivered from the display device during the audio test, the problem exists at your site.

• If the chair site has muted the speaker of your site, contact the chair site to resolve this problem.
• If the display device volume is adjusted to the lowest, restore the volume to its default value.
• If the endpoint volume is adjusted to the lowest, restore the volume to its default value.
• If the audio cable is connected incorrectly or insecurely, reconnect the audio cable from the endpoint to the display device.

If audio is properly delivered from the display device during the audio test, the problem occurs at the remote site.

• The microphone at the remote site has been muted or the chair site has muted this microphone. In this case, contact the chair site to resolve this problem.
• No sound pickup device, such as a microphone, is connected to the audio input port. In this case, set the audio source again or connect a sound pickup device to the corresponding port.
• The related sound pickup device is powered off. In this case, power on the device.
• The audio cable is connected insecurely. In this case, reconnect the audio cable to the endpoint.

While the endpoint is in use during a conference, only the sound from your site can be delivered from the display device and you cannot hear other sites.

A loopback test is being performed at your site.

Stop all local and remote loopback tests.