Sony KV-27FA210 Instructions: TV stand (primary manual) Operating Instructions Manual page 36

Operating Instructions
Use the
Speaker
Custom to select it.
selection of
On:
audio output
source
Off:
Use the
Audio Out
Use to control to select it.
the TV's volume
Variable:
through a stereo
Fixed:
✍
You can only set Audio Out settings when you have set Speaker to Off.
28
F or f buttons to highlight one of the following options, then press
Select to listen to the sound from the TV speakers with or without a
separate stereo system.
Select to turn off the TV speakers and listen to the TV's sound only
through external audio system speakers.
F or f buttons to highlight one of the following options, then press
Adjust the volume through your TV.
Adjust the volume through a connected stereo.