Automatic tuning, 1 press tuner to light the button up, 2 press fm/am to select the fm or am band – Sony STR-DE725 User Manual

Page 35: 3 press tuning + or tuning, Presetting radio stations, When the receiver reaches either end of the band, Press memory, Select a preset number by pressing it (0 to 9), 6 press memory again to store the station, 7 repeat steps 2 to 6 to preset another station