Oki MB760 Service Manual page 205

(7) After 10 to 40 seconds passes, the screen for notifying the success of performance is
displayed.
Then press the [OK] button. If this screen is not displayed or the screen for notifying
the failure of performance is displayed, quit this operation by pressing the [NO]/[CLOSE]
button. Then, check whether the one-time dongle, which you used for uploading the
selected license, is installed in the equipment.
(8) Check that the returned license is not displayed on the screen.
Remarks:
If there are any other licenses to be returned, repeat from step (4).
If there is no more licenses to be returned, press the [CLOSE] button, and then turn the
power OFF.
[B] Replace the sYs board
Notes:
Before replacing the SYS board, perform the following procedure.
 P. 6-10 "6.2.1 Precautions when replacing PC boards"
(1) Confirm that the power is turned OFF.
(2) Replace the SYS board.
(3) Install DIMM (main memory) to the new SYS board (from the old SYS board).
(4) Install SRAM board to the new SYS board (from the old SYS board).
(5) Install HDD to the new SYS board (from the old SYS board).
[C] Restore aDI key
If the ADI-HDD is installed, follow the steps below. To confirm the type of device, start up
the equipment in the 4C mode.
Notes:
If turning the power ON while pressing [3] and the [CLEAR] button simultaneously or
restoring the key is not possible, update the system firmware using the download jig, and
then perform this procedure again.
 P. 8-20 "8.4 Firmware Updating with PWA-DWNLD-JIG2"
(1) Turn the power ON while pressing [3] and the [CLEAR] button simultaneously.
(2) Enter the password, and then press the [OK] button. (If the password is not set for
Service, press the [OK] button without entering anything.)
(3) Key in [5] to select "5. Key Backup Restore", and then press the [START] button.
(4) Key in [5] to select "5. ADI Key SRAM to FROM", and then press the [START] button.
(5) Wait until the restoring of the encryption key is completed. "Operation Complete" is
displayed.
(6) Turn the power OFF.
45641001TH Rev.1
Oki Data CONFIDENTIAL
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