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A A
BC B
2.
Remove th e front cover.
For details, see "5.5.3 Removing the front cover."
3.
Remove all the fan units.
For details, see "19.4 Removing a Fan Unit."
4.
Loosen the tw o screws (A in the figure) securing the upp er cover a nd slide
the r ight and left stoppers (B in th e figure) inw ards. Then, remove t he upper
cover (C in the figure).
Figure 21-2
Removing the upper cover
5.
Loosen the one screw (A in the figure) securing the lower co ver and then
slide th e lower cover to the left to remove it.
Chapter 21 Maintaining the Crossbar Backplane Unit of the Crossbar Box 347