Ricoh SP 8400DN Field Service Manual page 1143

5.
Remove the controller bracket [A].
6.
Slide the controller board [A] to the right side to remove it.
7. Release the guide rail [A].
8. Remove the two used NVRAMs 1 [A] and 2 [B] from the old controller board and install them on the new
4.Replacement and Adjustment
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