NEC LC1400 Service & Reference Manual page 135

7. Remove the four screws (A) securing the SCSI Backplane assembly (B) to
the chassis and remove the backplane assembly (see Figure below).
8. Remove the 16 screws (C) securing the SCSI Backplane (D) to its mounting
panel (E).
9. Remove the SCSI Backplane.
4-56 Upgrading Your System
Removing the SCSI Backplane