My 1st post, help! Just bought a used BEOGRAM RX. Know nothing about B&O's. Turntable runs great, question is, how do you turn it off? Have four buttons, 33, 45, pause, turn. Can put LP on, when it finishes, the tonearm returns to rest position and table stops as it should. Just can't get it stop during mid-play. Help.......thanks. bprice