Oki MB760 Service Manual page 210

[C] Replace sRam board
(1) Confirm that the power is turned OFF.
(2) Take off the Fax Unit (GD-1340) if it is installed.
(3) Replace the SRAM board (for the SYS board).
 P. 6-8 "6.1.5 SRAM board <for SYS board>"
[D] Clear sRam system storage area
(1) Turn the power ON while pressing [6] and [CLEAR] simultaneously.
(2) When "SRAM Clear Mode" appears on the LCD, key in [1] to select "1. Clear SRAM"
and then press the [START] button.
(3) When "SRAM Format Completed" is displayed on the LCD, initializing is completed.
(4) Turn the power OFF.
[e] Restore sRam
If there is SRAM backup data, perform the following steps.
(1) Turn the power ON while pressing [6] and the [CLEAR] 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 device 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.
Remarks:
When the restoration is completed successfully, do not perform "[F] Clear SRAM
update error flags" or later procedures.
End this procedure here and finish replacing the SRAM board (for SYS board).
(11) Reinstall the GD-1340 Fax Unit if used.
[F] Clear sRam update error flags
(1) Turn the power ON while pressing [3] and the [CLEAR] button simultaneously.
(2) Enter the password, and then press the [OK] button. (If the password is not set for
Service, press the [ENTER] button without entering anything.)
(3) After "Firmware Assist Mode" is displayed on the LCD, check that "1: Clear Error Flag
in Software Installation." 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.
45641001TH Rev.1
Oki Data CONFIDENTIAL
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