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58
3. On the TV’s Home screen menu, navigate to Settings > Control other devices (CEC) > Search for
CEC devices, and then press OK to start the discovery process.
When finished, the TV displays a list of CEC devices that are connected to each HDMI input, as well as
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 to see a
complete list in a scrollable window.
Enabling HDMI ARC
HDMI ARC is the audio return channel that is available on one of the TV’s HDMI ports. The audio return
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 ARC reduces the number of cables needed
and optionally lets you control the volume and mute state of the receiver by enabling system audio
control.
HDMI ARC is disabled by default. To enable HDMI ARC, in the Home screen menu, navigate to Settings >
Control other devices (CEC), and then highlight HDMI ARC. Press OK to check the adjacent check box.
Enabling system audio control
System audio control enables the TCL • Roku TV remote control to change the volume and mute state of
an amplifier or sound bar connected through HDMI, and to display the external device’s volume and
mute 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.
A CEC-compatible amplifier is powered on and CEC discoverability is enabled.
The CEC-compatible amplifier’s HDMI ARC connector is connected to the TV’s HDMI ARC
connector with a suitable HDMI cable.
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 TCL • Roku TV speakers” on page 56) and resumes local
control of volume and mute state.
System audio control is disabled by default. To enable system audio control, in the Home screen menu,
navigate to Settings > Control other devices (CEC) and highlight System audio control. Press OK to
check the adjacent check box.
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