Using The Sleep Timer - Sony STR-DA4300ES Operating Instructions Manual

Using the sleep timer

You can set the receiver to turn off
automatically at a specified time.
SLEEP
Press SLEEP repeatedly.
Each time you press SLEEP, the display
changes cyclically as follows:
104 GB
When sleep timer is being used, "SLEEP"
lights up.
Tip
To check the remaining time before the receiver
turns off, press SLEEP. The remaining time appears
on the display. If you press SLEEP again, the sleep
timer will be changed.