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148 Installing System Components
Power Distribution Board
The power distribution board is located on your system directly behind the
power supply fan module. See Figure 3-32.
Removing the Power Distribution Board
CAUTION: Many repairs may only be done by a certified service technician.
You should only perform troubleshooting and simple repairs as authorized in
your product documentation, or as directed by the online or telephone service
and support team. Damage due to servicing that is not authorized by Dell is not
covered by your warranty. Read and follow the safety instructions that came
with the product.
1
Turn off the system and attached peripherals, and disconnect the system
from the electrical outlet.
2
Open the system. See "Opening the System" on page 83.
3
If applicable, remove the internal hard drive bay and support carrier. See
"Removing an Internal Hard-Drive Bay" on page 91.
4
If applicable, remove the thumb screw on the support bracket and lift it up
and out of the system.
5
Remove the power supplies from the system. See "Removing a Power
Supply" on page 102.
6
Remove the expansion cards. See "Removing an Expansion Card" on
page 115.
7
Remove the expansion card riser. See "iDRAC6 Express Card (Optional)"
on page 122.
8
Disconnect power distribution cables from the system board (see "System
Board" on page 152).
9
Disconnect the fan cable.
10
Remove the screws securing the power distribution board to the chassis.
See Figure 3-31 and Figure 3-32.
NOTE: The twelve–hard-drive systems have three screws securing the power
distribution board to the chassis. The eight–hard-drive systems have four
securing screws securing the power distribution board to the chassis.
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