Panasonic PT-RZ21K Operating Instructions Manual page 180

3) Press asqw to select the text, and press the <ENTER> button to enter the text.
4) Press asqw to select [OK], and press the <ENTER> button.
f To cancel, select [CANCEL].
Attention
f The initial password is "AAAA" as the factory default setting or when the [PROJECTOR SETUP] menu → [INITIALIZE] → [ALL USER DATA]
is executed.
f Change the password periodically that is hard to guess.
180 - ENGLISH
Chapter 4 Settings — [SECURITY] menu