If the encryption key back-up has been lost, or the encryption key restoration has failed, follow the procedure below to do a forced start-up.
When the restoration is carried out in the following procedure, data on the micro SD and NV-RAM are initialized (encrypted data will be deleted, and the user settings will be cleared).
SC870-09 may occur. In such a case, the address book is formatted, so be sure to back up the address book.
Prepare an SD card.
Create a directory named “restore_key” inside the root directory of the SD card.
Save the “nvram_key.txt” file using the following name:
/restore_key/nvram_key.txt
Create a text file and write "nvclear".
Write this string at the head of the file.
Use all lower-case letters.
Do not use quotation marks, line break, or blank spaces.
Turn the power switch OFF.
Insert the SD card that contains nvram_key.txt" into the machine's rear SD card slot.
Turn the power switch ON.
Check that a message “Are you sure you want to clear the NVRAM?” is displayed on the LCD, then press the execute button.
Check that a message “Initialize the NVRAM after the machine is started.” appears, and then turn the power switch OFF.
Remove the SD card.
Turn the power switch ON.
If SC870-09 occurs, turn the power off and then back on. The address book is formatted during initialization.
Check that a message is displayed on the LCD telling you to initialize the micro SD card, then press “Initialization”.
If the message reporting the formatting does not appear in step 12, reconfigure data encryption (cancel data encryption and then execute data encryption again), and then proceed to step 15. (For details about cancelling and then executing data encryption, see “Enabling the Encryption Settings”.)
After Initialization is completed, turn the power switch OFF.
Turn the power switch ON.
Do SP5-801-001 (Memory Clear/All Clear)
Set necessary user settings with the User Tools menu.