Oki MB760 Service Manual page 142

[F109_5] key consistency error (encryption key for aDI-HDD is damaged)
Classification
Other service call
Check item
Encryption key status
confirmation
Take measures given in the following table according to the messages displayed in the SRAM
Key Status and FROM Key Status fields.
Remarks:
If the error is not cleared, reinstallation of the system firmware, system software and application
is needed. ([4]+[9] → Power-ON)
SRAM Key
Status
*
AccessFailed
OK
KeyNull/
KeyBroken
KeyNull/
KeyBroken
45641001TH Rev.1
Key consistency error - Encryption key for ADI-HDD is damaged.
Check the message displayed by [3] + [C] + [POWER] → 5. Key Backup
Restore.
FROM Key
Status
AccessFailed Replace the SYS board.
 P. 6-18 "6.2.4 Precautions and Procedures when replacing the SYS
board" (all steps)
<With USB backup data: All key data recovery>
1. Recover all the data on the SRAM board.
[5] + [9] + [POWER] → 2. Restore SRAM Data from USB (For
details, see "9.1.4 Cloning procedure [B] Restore procedure")
2. Recover the encryption key/license on the SYS board.
Follow the procedures below noted in "6.2.4 Precautions and
Procedures when replacing the SYS board".
[C] Restore ADI key (only when ADI-HDD is installed)
[D] Restore encryption key
[E] Restore license
* Replace the SRAM board (for the SYS board).
 P. 6-22 "6.2.5 Precautions and procedure when replacing the
SRAM board (for the SYS board)" (all steps)
KeyNull/ Recover the ADI key on the SYS board.
KeyBroken  P. 6-18 "6.2.4 Precautions and Procedures when replacing the SYS
board" ([C] Restore ADI key)
OK Recover the encryption key on the SRAM board.
 P. 6-22 "6.2.5 Precautions and procedure when replacing the
SRAM board (for the SYS board)" ([G] Backup ADI key)
KeyNull/ <No USB backup data>
KeyBroken 1. Create the partition in the HDD, and reinstall the system software.
 P. 6-13 "6.2.3 Precautions and procedures when replacing the
HDD"(Perform step 3 or later in "[E] Replace / Format HDD")
<With USB backup data: All key data recovery>
1. Recover all the data on the SRAM board.
[5] + [9] + [POWER] ® 2. Restore SRAM Data from USB (For
details, see "9.1.4Cloning procedure [B] Restore procedure")
2. Recover the encryption key/license on the SYS board.
Follow the procedures below noted in "6.2.4 Precautions and
Procedures when replacing the SYS board".
[C] Restore ADI key (only when ADI-HDD is installed)
[D] Restore encryption key
[E] Restore license
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