Setting the System Manager PIN (imageRUNNER 2004)
Set a System Manager PIN that is intended exclusively for Administrators. You can access <System Management Settings> only when the PIN has been entered correctly. It is recommended that only Administrators know the PIN.
1
Tap <Menu> in the Home Screen.
2
Tap <System Management Settings>.
3
Select <System Manager Information Settings> 
<System Manager PIN>.
<System Manager PIN>.4
Specify the System Manager PIN.
Enter a number of up to seven digits, and tap <Apply>.
When <PIN (Confirm)> is displayed, enter the PIN once again to confirm.
You cannot set a PIN that consists only of zeros, such as "00" or "0000000".
To disable the PIN, press 
to erase the PIN (leave the text box blank), and tap <Apply>.
to erase the PIN (leave the text box blank), and tap <Apply>.