Samsung UN46ES7500FXZA E-Manual page 165

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The USB device must be connected
to your TV before you can select
USB.
Antenna
TV): Select
Channel
Select the desired channel.
Music / Photo
to USB): Select a folder in the USB
device containing music or photo files
you want played when the TV turns on
(when the
Air or Cable.
(when the
(when the
Source is set to
Source is set to TV):
Source is set