Sony XR-5450 Operating Instructions Manual page 17

Exampie: To memorize on the preset number button 1
Press to select the desired band, FMI, FMIl,
Fill, AMI or AMII.
The tuner turns on at the same time.
Tune in a desired station
using the automatic or manual tuning.
Press for more than two seconds.
The number of the pressed preset number button
will be displayed. "MEM" indication appears to
show that the station has been memorized.
("MEM" indication will disappear in a few
seconds.)
Repeat these steps for each preset number button.
important
Ever, preset number button has only one memory for
a band. The previously memorized station will be
erased when you enter a new station of the same
band on the same preset number button.