Yealink VC400, User Manual

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User Guide for the VC400 Video Conferencing System
140
Reflected light from pale walls often produces excellent results.
Avoid the following situations:

Direct sunlight on the display device, the background, or the camera lens which creates
harsh contrasts.

Colored lighting.
Why can’t I adjust the camera angle and focus?

You can adjust the camera when the system is idle or during a call. The camera cannot be
adjusted when the system is in the menu screen.

Ensure that the batteries in the remote control are in good working condition, and installed
correctly.

Aim the remote control at the sensor when you perform a task.

Ensure that no objects are obstructing the sensor on the front of the camera.

Ensure that the LED on the front of the camera flashes green when you use the remote
control to perform a task.

Ensure that what you are controlling is the local camera.

Reboot the system.

If the above suggestions cannot solve your problem, perhaps the remote control is broken.
You can contact your system administrator for help.
Why is the video quality bad?

Ensure that the display device has suitable resolution.

Check whether the packet has been lost. For more information on packet loss, refer to Call
Statistics on page 105 .

Contact your administrator to adjust the camera brightness and white balance.
Display Issues
Why is there no video on the display device?

Ensure that the display device is turned on.

Ensure that the display device is properly connected to VC400codec.

Ensure that the VC400 codec is turned on.

Ensure that you have selected the correct video input source.
Why can’t the display device start a presentation?

Ensure that the PC is properly connected to the VC400 codec.