Brother TD-2120N - Manual (Page 83)

Using the Touch Panel Display (Optional:PA-TDU-001) (TD-2120N/2130N only)
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• To cancel the password settings, press [ ] (admin key), type in the password to display the
parameters, and then set [Admin Password] to [Off].
• If you do not remember the password, use [Device settings] in the “Printer Setting Tool” to
return all settings to their factory defaults or specify the password again and apply it. For
details, see Device Settings on page 34.