There are two NVRAMs ([A] and [B]) on the controller board. The two NVRAMs are one set. NVRAM [A] is labeled "2M-1", and NVRAM [B] is labeled "2M-2".
When replacing the controller board, remove the NVRAMs from the old controller board. Then install them at the same position on the new controller board. If this is not done, SC195-00 occurs.
Install NVRAM (2M-1) in the socket that has "FRAM-1" [C] printed next to it on the controller board. Install so that the indentation [E] on NVRAM (2M-1) is facing the direction of the arrow [G] that is printed on the controller board.
Install NVRAM (2M-2) in the socket that has "FRAM-2" [D] printed next to it on the controller board. Install so that the indentation [F] on NVRAM (2M-2) is facing the direction of the arrow [H] that is printed on the controller board.
Note that if you install incorrectly, both the controller board and NVRAMs will be damaged.
When replacing the controller board, first, check which ESA applications have been installed. After replacing the controller board, re-install the ESA applications by following the installation instructions for each application.
After reinstalling the ESA applications, print the SMC (SP-5-990-024/025 (SMC: SDK/Application Info)). Then open the tandem tray [A] and remove the paper set sheet [B]. Store the SMC sheet [C] and the SD card(s) [D] that were used to install the ESA application(s).