Sony STR-DH770 Manual page 22

an HDMI connection
With just one HDMI cable connection, you can listen to the TV audio from the speakers
connected to the receiver while the receiver sends audio and video to the TV.
HDMI cable (not supplied)
Note
Sony recommends that you use an HDMI-authorized cable or HDMI cable made by Sony. Be sure to
use a High Speed HDMI Cable with Ethernet. Premium High Speed HDMI Cable with Ethernet is
required for 4K/60p 4:4:4, 4:2:2, and 4K/60p 4:2:0 10 bit, etc.
For this connection, you need to turn the Control for HDMI function on. Press AMP MENU, then set
[<HDMI>] - [CTRL HDMI] to [CTRL ON] on the display panel.
Hint
If the HDMI jack of the TV (labeled "ARC") is already connected to another device, disconnect the
device and connect the receiver.
Connecting a TV without HDMI jacks
Solid lines show recommended connections and the dashed lines show alternative connections
for audio signals. It is not necessary to connect all the cables. Connections for video signals
are required.
Video cable (not supplied)
Audio cable (not supplied)
Optical digital cable (not supplied)
Note
Connect a TV monitor or a projector to the HDMI TV OUT or MONITOR OUT jack on the receiver.
Depending on the status of the connection between the TV and the antenna (aerial), the image on
the TV screen may be distorted. If this is the case, place the antenna (aerial) farther away from the
receiver.
Hint
When connecting a TV to the receiver via the TV IN jacks of the receiver, set the sound output jack
of the TV to "Fixed" if it can be switched between "Fixed" or "Variable."