Dell PowerVault 715N Service Manual page 20

Figure 7. Fan Assembly
When replacing the fan assembly, ensure that the fan fits over the pegs on the chassis floor, as well as the fan power
connector on the corner of the system board.
System Board and Midplane Board
The system board and midplane board are joined together with a connector and secured to a metal bracket. Connectors
on the front of the midplane board connect to the four hard drives. On the back of the midplane board is a single large
connector that connects to the system board, providing control and data signals and power for the four hard drives (see
Figure 8). A ribbon cable from the midplane board connects to the control panel board.
CAUTION: Read the safety instructions in your System Information document.
Figure 8. System Board and Midplane Board Removal
1 Midplane board
2 System board
3 Thumbscrew
4 Center release latch
5 Side latches (2)