Vizio E321MV - TV Controls and Connections; Rear Panel Ports and Connectivity

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Controls and Connections
USB: Connect a USB thumb drive to view photos.
HDMI (1,2,3): Connect HDMI devices.
Component: Connect component device.
Composite: Connect composite device.
3.5mm Stereo Out: Connect 3.5mm audio device.
Cable/Antennal: Connect RF/Coaxial connector from cable, antenna, or
satellite box.
RGB PC: Connect RGB cable from computer. Use 3.5mm port to
connect PC audio.
3.5mm PC
Audio In:
Connect 3.5mm cable from PC audio out when using
RGB PC port to display PC output.
Optical Digital
Audio Out:
Connect SPDIF/Optical audio device (soundbar,
receiver, etc).
Rear Panel
Rear Panel
RGB PC
Optical Digital
Audio Out
USB
HDMI (1,2,3)
Composite
Component
3.5mm Stereo
Out
Cable/Antenna
3.5mm PC Audio In