FCU
D255/D256 FAX OPTION 10 SM
2. REPLACEMENT AND ADJUSTMENT
2.1 FCU
2.1.1 SRAM DATA TRANSFER PROCEDURE
When you replace the FCU board, transfer the SRAM data from the old FCU board to the new
FCU board. Perform the following procedure to back up the SRAM data.
 The following data can be transferred: TTI, RTI, CSI, Fax bit switch settings, RAM
address settings, NCU parameter settings.
1. Open the rear upper cover [A].
2. Insert a flathead screwdriver into [A] to release a hook of the controller cover [B].
3. Release the hook by opening the right side of the cover as shown below, and then
remove the cover [A] by rotating it in the direction of the blue arrow.
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