Koss KS5429-2 Manuel Du Propriétaire page 15

Note:
The Default Password is Left, Left, Menu, Right. This password is
always effective even after you have selected your own password
and changed it. To avoid others using the default password to set
the parental level and change the password, you can record this
default password in other place and delete it from this manual.
Some discs can be limited depending on the age of users while
some discs cannot. If you want to change the password, only Left,
Right and Menu are available.
4) With no disc playing, select Preference to choose Audio language, Subtitle
language, Disc Menu language, Parental level and Default setting.
Note:
1. Language and subtitle selections are available only for discs that
are recorded in the languages listed above. If the selected
language is not available, the player will play and display on the
screen the original language recorded in the disc.
2. The Parental setup 8 levels are listed from the lowest level (1 Kid
Safe) to the highest level (Adult). Enter a 4 digit password ( Left,
Left, Menu, Right) to change it and the level of 8 Adult is default
setting.
Especially if the unit don't allow to play a disc since the parental
lock, you can input the correct password to pass the inspection.
Password Change Menu Screen
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