Fujitsu PRIMERGY TX1330 M4 Upgrade And Maintenance Manual page 131

Power supply unit (PSU)
Figure 57: Removing the screws
Ê Remove the five screws (see circles).
Figure 58: Taking out the standard PSU
Ê Push the PSU a few centimeters toward the inside (1) to disengage the
locking mechanism.
Ê Lift the PSU out of the chassis (2).
Upgrade and Maintenance Manual 131
TX1330 M4