Fujitsu PRIMERGY TX2550 M4 Upgrade And Maintenance Manual page 333

Expansion cards and backup units
Figure 232: Removing the TFM
Ê Fasten the TFM to the RAID controller with the two screws from the TFM kit.
Figure 233: Connecting the FBU adapter cable to the TFM
Ê Connect the FBU adapter cable to the TFM (see circle).
Ê Install the expansion card with the defective TFM installed, see section
"Installing an expansion card" on page 312.
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TX2550 M4 Upgrade and Maintenance Manual