Ricoh Aficio ISC 615G - Manual (Page 269)

Registering a Protection Code
261
7
F
Press [Details].
G
Select [Auth. Protect] using {U} or {T}, and then press the {OK} key.
H
Select [Folder Protect] using {U} or {T}, and then press the {OK} key.
I
Select [On] using {U} or {T}, and then press the {OK} key.
J
Select [Destination Protect] using {U} or {T}, and then press the {OK} key.
K
Enter a protection code using the number keys, and then press the {OK}
key.