Sony PS-LX310BT Operating Instructions Manual page 37

 VOLUME (page 21)
 INPUT SELECTOR
Selects the input channel connected to
the device you want to use.
Indicators on the display panel
 Speaker system indicator
(page 19)
Note
These indicators do not light up if the
speaker output is turned off or if
headphones are connected.
 SLEEP
Lights up when the sleep timer is
activated.
 Tuning indicator
Lights up when the receiver tunes to a
radio station.
MEMORY
A memory function, such as Preset
Memory (page 25), etc., is activated.
RDS (European and Asia-Pacific
models only)
Tuned to a station with RDS services.
MONO
Monaural broadcast
ST
FM stereo broadcast
GB
8
 PORTABLE IN jack (page 16)
 PHONES jack
Connect headphones here.
Preset station number (The number
will change according to the preset
station you select.)