RX2540 M4 Upgrade and Maintenance Manual 301
Expansion cards and backup units
9.10.3.8 Installing the FBU
Ê Install the second FBU, see section "Installing an FBU on the riser card
holder (FL)" on page 317.
9.10.3.9 Installing the air duct riser module 2
Figure 199: Preparing the air duct for riser module 1
Ê Break out the blind cover on the right side from the air duct using a side
cutter (see circles).
Ê Install the air duct, see section "Installing the air duct" on page 89.