LG CineBeam Laser HF85LS Owner's Manual page 122

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[Auto Volume]
(Q. Settings)
Click [On] to adjust the volume level automatically.
This feature is available on certain models only.
[AV Sync Adjustment]
(Q. Settings)
Adjusts the synchronization of the sound from the speaker that is working.
The closer to (+), the slower the audio output.
If you select the [Bypass], Outputs the sound from external devices without any
audio delay. The audio may be output before the video because of the time the
projector takes to process the video input.
[Sound Test]
(Q. Settings)
Start the [Sound Test] to check that the sound signal output is normal, and then
select whether there is an error.
If there are no problems in the test, check the connected external device.
• Sound test is possible by Internal projector Speaker only.
[Sound] [Auto Volume]
[Sound] [AV Sync Adjustment]
[Sound] [Sound Test]