Ricoh Aficio MP 1600 - Page 337

Registering a Protection Code
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L Select [On] using {U} or {T}, and then press the {OK} key.
M Press [Exit] twice.
N Press the {OK} key.
O Press the {User Tools/Counter}.
Note
! Specify a protection code of up to eight digits. You can also specify "Pro-
tection" without specifying a protection code.