Toshiba BA400 Series Key Operation Specification page 143

Password entry for user system mode
Display
When a wrong password is entered or the [FEED] key or [RESTART] key is pressed
A wrong password was entered for 3 times consecutively.
Note:
If you forgot the system mode password, disable it with @010 command
Procedure
Turn on the printer, press the [PAUSE] key to place the printer in pause
state. Then, hold down the [RESTART] key for 3 seconds.
The password entry screen is displayed.
Enter the password.
The printer enters the user system mode.
Password invalid message is displayed.
The printer locks. Turn off printer and back to on.
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