A A
BC B
2. Removeall thefan units.
For details, see "19.4 Removinga Fan Unit."
22.4.2 Removing the fan backplane
1. Loosenthe two screws (A in the figure) securing the upper cover and then
slidethe right and left stoppers (B in the figure) inwards. Then, remove the
uppercover (Cin the figure).
Figure22-2 Removingthe upper cover
2. Loosenthe one screw (A in the figure) securing the lower cover and then
slidethe lower cover tothe left toremove i t.
Chapter22 Maintaining the Fan Backplaneof the Crossbar Box 361