Samsung dx-3 Manuel D’Utilisation

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Speaker Select 
When you use the product with it connecting to a Home theater, turn the Internal speakers
off so you can listen to sound from the Home theater's (external) speakers.
1. Internal
Sound is outputted both from the Internal speaker and the External speakers, but the
volume control is only available from the Internal speaker.
2. External
Sound is only output from the External speakers, and the volume can only be controlled
for them as well.
Sound Reset 
Reset the sound settings.
Setup
Available Modes
 PC / DVI / DisplayPort
 AV
 Component
 HDMI
 MagicInfo
 TV
 Note
A TV tuner box (sold separately) must be connected to use the TV. (US Only)
MagicInfo can only be enabled when a network box(sold separately) is connected.
Adjusting the LCD Display