• Keep NVRAMs away from any objects that can cause static electricity. Static electricity can damage NVRAM data.

  1. Remove the controller box. (Controller Box (IM 550F/600F/600SRF))
  2. Disconnect the connector on the controller box [A].
  3. Remove the fax unit [A].
  4. Remove the slot cover [A].

  5. Remove the controller box cover [A].

    • The screw [B] is smaller than the other screws. Be careful not to use the wrong screw when installing the controller box cover.

  6. Remove the controller board [A] with the BiCU [B].

    • Be careful not to damage any components of the controller board [A] and the BiCU [B].

  7. Separate the controller board [A] from the BiCU [B].
  8. Remove the two guide rails [A] from the controller board [B].
  9. Remove the NVRAM [A] from the old controller board and install them on the new controller board.

  • Make sure the NVRAM [A] is installed in the correct mounting location and orientation. Install the NVRAM so that the indentation on the NVRAM corresponds with the mark [B] on the controller board.
  • Incorrect installation of the NVRAM will damage both the controller board and NVRAM.