Toshiba e-STUDIO556 Service Manual page 847

(1) Turn the power ON while pressing [6] and the [C] button simultaneously.
(2) When "SRAM Clear Mode" appears on the LCD, key in [0] to select "0. Set Serial Number" and
then press the [START] button.
(3) Key in the serial number on the label attached to the rear cover of the equipment, and then press
the [OK] button.
(4) "Serial Number Setting completed" is displayed.
(5) Turn the power OFF.
(6) Install the USB media in the equipment, and then turn the power ON while pressing [5] and [9]
simultaneously.
(7) Key in [2] to select "2. Restore SRAM Data from USB" and then press the [START] button.
(8) Enter the password set for the backup data.
(9) Enter the serial number of the backup file.
(10) Turn the power OFF after the restoring of SRAM is completed.
Remark:
When the restoration is completed successfully, do not perform  P.9-29 "[F] Clear SRAM
update Error flags" or later procedures. End this procedure here and finish replacing the SRAM
board.
(11) Reinstall the GD-1250/1350 Fax Unit if used.
[F] Clear SRAM update Error flags
(1) Turn the power ON while pressing [3] and the [C] button simultaneously.
(2) Enter the password, and then press the [OK].
(If the password is not set for Service, press the [OK] button without entering anything.)
(3) After "Firmware Assist Mode" is displayed on the LCD, check that "1: Clear SRAM update Error
flags." is marked and press the [START] button.
If not, key in [1] and then press the [START] button.
(4) When "Operation Complete" is displayed on the LCD, clearing the flag is completed.
(5) Turn the power OFF.
[G] Backup ADI key
Perform the following procedures if the ADI-HDD has been installed.
(1) Turn the power ON while pressing [3] and the [C] button simultaneously.
(2) Enter the password, and then press the [OK].
(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 [6] to select "6. ADIKey FROM to SRAM", and then press the [START] button.
(5) Wait until the backup of the ADI key is completed. "Operation Complete" is displayed.
(6) Restart the equipment after the backup is completed. If you want to perform the backup of the
license, do not restart the equipment but perform from (4) in "[H] Backup encryption key".
[H] Backup encryption key
(1) Turn the power ON while pressing [3] and the [C] button simultaneously.
(2) Enter the password, and then press the [OK].
(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 [2] to select "2. Key FROM to SRAM", and then press the [START] button.
(5) Wait until the backup of the encryption key is completed. "Operation Complete" is displayed.
© 2011 - 2014 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO556/656/756/856/557/657/757/857
REPLACEMENT OF PC BOARDS / HDD
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