Sony MDS-S40 Operating Instructions Manual page 6

Hooking Up the Audio Components
Setting the voltage (only on models
supplied with a voltage selector)
Make sure the voltage selector on the rear panel of the
deck is set to the voltage of the local power supply. If not,
use a screwdriver to change it to the correct position
before connecting the AC power cord to a wall outlet.
VOLTAGE SELECTOR
110–120V
Connecting the AC power cord
Connect the AC power cord of the deck to a wall outlet.
Note
Do not connect the AC power cord to a switched outlet.
6 GB
220–240V