Ricoh VT2250 Operator's Manual page 63

OPERATION
Using the Number keys, enter
4
the grade that you want to pro-
tect.
Press the Enter key.
5
Cancelling protection
While pressing the Reset and
1
Stop keys simultaneously, press
the Program Class key.
The guidance display will appear as
opposite.
Enter "0" using the Number keys.
2
55
0 : CANCEL PROTECTION
1 : PROTECT NO. _