NEC EXPRESS5800/140He Service Manual page 129

Main Board
7. Remove the screws (2 at each of the left and right sides) fixing the Connect Board and
pull out board from the Main Board.
8. Do the reverse procedure for the installation.
While the Connect Board is connected to the Main Board, note sufficiently that any
connector pins may not be caught.
[Removed Main and Connect Boards]
Connect Board
[Pull-out Connect Board]
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