If the encryption key back-up has been lost, or the encryption key restoration has been failed, follow the procedure below to do a forced start-up.

When the restoration is carried out in the following procedure, data of NVRAM is 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.

  1. Prepare an SD card.
  2. Create a directory named “restore_key” inside the root directory of the SD card.
  3. Save the “nvram_key.txt” file using the following name:
    /restore_key/nvram_key.txt

  4. 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.

  5. Turn the power switch OFF.

  6. Insert the SD card that contains "nvram_key.txt" into the machine's rear SD card slot.

  7. Turn the power switch ON.

  8. Confirm that a message “Are you sure you want to clear the NVRAM?” is displayed on the LCD, then press the “OK” button.

  9. Confirm that a message “Initialize the NVRAM after the machine is started.” then turn the power switch OFF.

  10. Remove the SD card.

  11. Turn the power switch ON.

    If the message “Address book data error” appears, turn the power off and then back on. (SC870-09 is added to the SC history.)

  12. Do SP5-801-001 (Memory Clear/All Clear)

  13. Set necessary user settings with the User Tools key.