Manual _verified_ - Sony Lbt-d507 User
A: Yes. Press the "CLOCK/TIMER SELECT" button repeatedly until the display shows "OFF" or "--:--." You cannot turn it off completely without unplugging the unit, as the manual notes the clock uses backup memory.
An integrated 5-disc rotary changer that allows for continuous playback. Cassette Deck (TC-D507): sony lbt-d507 user manual