User`s manual

Press the up / down button to adjust brightness. The new setting is
previewed on screen. Press the enter button to confirm.
Contrast Select to set contrast levels.
Press the up / down button to adjust contrast. The new setting is
previewed on screen. Press the enter button to confirm.
TV System Select to adjust TV system.
Press the up / down button to set the TV system, depending on your
viewing preferences. Press the enter button to confirm.
7.4 Changing Audio Settings
Press the left / right button on the remote control to select the Audio tab from the menu bar.
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