Canon MF9100 Series Service Manual page 43

Operation Procedure
(1) Enter the service mode and display the following service mode.
When you have entered the service mode, use the right and left arrow keys to display items, and press the OK key to fix the setting.
(2) Display LCNS-OF by selecting Copier > Option > LCNS-OF.
(3) Press the OK key and display #LMS ERASE.
(4) Select a desired license from valid ST licenses for which 0001 is displayed, and press the OK key.
(5) Change the number to 0 and press the OK key.
(6) Turn OFF/ON the power of the main unit.
For Reference:
There is no function to display the license registration numbers in the main unit. Therefore, when there is a possibility to restore the license after erasing it, make
sure that a user has written down the license registration number.
When a license option is displayed in Procedure (4), 0001 is displayed. The last "1" shows that the license is validated by license authentication.
After the license is erased, the last number is again changed to "0".
Details about the last number:
1: The function is validated.
0: The function is invalidated, or a license is transferred.
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Chapter 4
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