Fujitsu PRIMERGY TX300 S7 Upgrade And Maintenance Manual page 174

Power supply
Figure 78: Removing a PSU dummy module (B)
Ê Remove the dummy module from its slot.
V
CAUTION!
Keep the dummy cover for future use. If a power supply module is
removed and not immediately replaced by a new one, a PSU dummy
cover must be replaced in the slot to comply with applicable EMC
regulations and satisfy cooling requirements.
174 Upgrade and Maintenance Manual
TX300 S7 / RX350 S7