TCL 55US5800 User Manual page 77

When finished, the TV displays a list of CEC devices that are connected to each HDMI
any devices that had previously been connected. The TV remembers the names of multiple CEC devices
even when they are no longer connected. If the list is longer than the allowed space, press Þ to see a
complete list in a scrollable window.
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Enabling HDMI ARC
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HDMI ARC is the audio return channel that is available on one of the TV's HDMI
channel enables you to send a Dolby Digital audio signal back to a home theater receiver that is also
sending an audio and video signal into the TV. Using HDMI
and optionally lets you control the volume and mute state of the receiver by enabling system audio
control.
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HDMI ARC is disabled by default. To enable HDMI
> System > Control other devices (CEC), and then highlight HDMI ARC. Press OK to enable or disable the
feature.
Note: Enabling HDMI ARC also enables System audio control. After enabling HDMI ARC, you can
disable System audio control if you prefer.
Enabling system audio control
System audio control enables the TV remote control to change the volume and mute state of an
amplifier or sound bar connected through HDMI
status in the TV's on-screen display.
The TV automatically turns off its internal speakers and sends volume and mute control signals to an
external amplifier when all of the following are true:
System audio control is enabled on the TV.
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The TV is connected to a CEC-compatible amplifier, it is powered on, and CEC discoverability is
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enabled.
The CEC-compatible amplifier's HDMI
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connector with a suitable HDMI
When the CEC-compatible amplifier is off, the TV automatically turns on its speakers (unless you have
turned them off as described in "Turning off the speakers" on page 67) and resumes local control of
volume and mute state.
To enable or disable system audio control, in the Home screen menu, navigate to Settings > System >
Control other devices (CEC) and highlight System audio control. Press OK to enable or disable the
feature.
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ARC reduces the number of cables needed
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ARC, in the Home screen menu, navigate to Settings
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, and to display the external device's volume and mute
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ARC connector is connected to the TV's HDMI ARC
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cable.
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input, as well as
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ports. The audio return