Dell EMC PowerEdge R740xd2 Installation and Service Manual

Installing the cable chain assembly

Follow the safety guidelines listed in Safety instructions.
Power off the system and all attached peripherals.
Disconnect the system from the electrical outlet, and disconnect the peripherals.
Ensure that all internal cables are routed correctly and connected, and no tools or extra parts are left inside the system.
Open the drive bays, remove all drives, and then close the drive bays.
Remove the power supply units.
If installed, remove front bezel.
Remove the system from the rack and place it on an ESD work bench. For more information, see the Rail Installation Guide available at https://www.dell.com/poweredgemanuals.
Remove the system cover.
Remove the following:
Disconnect all cables connected to the cable chain assembly from the backplanes and the system board.

Place the cable chain assembly in the system and route the left control panel cable through the cable chain base bracket.
Using a Phillips #1 screwdriver, replace the screws for the cable chain rail after aligning it to the chassis and align the cable chain assembly to the bottom screw holes.
Figure 1. Placing the cable chain assembly in the system
Slide the left side of the system, partially off the table, until the bottom screws holes for the cable chain base bracket are visible and replace the screws.
Align the cable chain side cover to the guiding pins on the system and tighten the captive screw.
Figure 2. Replacing the cable chain side cover and the bottom screws
Replace the screws for the left and right white plastic rail stops.
NOTE:Make sure the left control panel cable is routed through the cable chain base bracket and connect the cable connector to the system board connector.
Figure 3. Replacing the screws for the left and right white plastic rail stops
Align the support bar to the chassis and replace all the screws.
Align the bay 2 backplane bracket to the cable chain assembly and replace the screws.
Align the cable chain top cover to the guiding pins and replace all the screws.
Figure 4. Replacing the support bar, cable chain top cover and connecting the bay 2 backplane bracket from the cable chain assembly.