Sony DAV-C450 Operating Instructions Manual page 59

The display for setting the playback
limitation level aid changing the
password appears.
...~--.~-^
COLOR SYSTEM
PARENTAL CONTROL
PARENTAL CONTROL
TRACK SELECTION
The selection items for "~~A~~~R~
'are displayed.
If
YOU
select "~r~~R~ -+," select and
enter the standcard code in the table on
page 61 using the number buttons.