Oki MB760 Service Manual page 140

[F109_3] key consistency error (HDD encryption parameter damage)
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
AccessFailed
KeyNull/
KeyBroken
KeyNull/
KeyBroken
* AccessFailed, KeyNull or KeyBroken
45641001TH Rev.1
Key consistency error - Parameter used for HDD partition encryption are
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 SYS board.
 P. 6-22 "6.2.5 Precautions and procedure when replacing the
SRAM board (for the SYS board)" (for the SYS board, all steps)
KeyNull/ Recover the encryption key on the SYS board.
KeyBroken  P. 6-18 "6.2.4 Precautions and Procedures when replacing the SYS
board" ([D]Restore encryption key)
OK 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)
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)" (for the SYS board, [H] Backup
encryption key)
KeyNull/ <No USB backup data>
KeyBroken 1. Reinstall the system software.
 P. 8-3 "8.2 Firmware Updating with USB Device"
<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
Oki Data CONFIDENTIAL
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