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Replacing FRUs in a Spare CGR Chassis
Detailed Steps to Replace the Chassis
Warning: Only trained and qualified personnel should be allowed to install, replace, or service this equipment.
To prevent ESD damage, follow these guidelines:
Always use an ESD wrist or ankle strap and ensure that it makes good skin contact
Connect the equipment end of the strap to an unfinished chassis surface
Place the BBU on an anti-static surface or in a static shielding bag.
Avoid contact between the battery and clothing
Do not remove the wrist strap until the installation is complete
Figure 11
Shows the front door open with 3 BBUs mounted in the door.
To swap the BBUs on the chassis door, perform the following:
1.
Remove the outermost BBU by loosening the 6 screws at a torque of 8 lbs-in. Refer to
Note: Screws are captive type and do not come off of the BBU.
2.
Unplug the BBU from the BBU stack. Please do not touch the torx screws.
3.
Remove the 2nd and 3rd BBU by the same process as in
4.
Once the last BBU has been released from the cover, unplug the cable harness on the side of BBU. Refer to
Figure
13.
5.
Install the last BBU into the new chassis by plugging in the cable harness, then attach the BBU to the cover and
tighten the 6 captive screws at a torque of 8 lbs-in. Refer to
6.
Plug the 2nd BBU into the 1st one attached to the chassis, and tighten the 6 screws at the same torque as the first
BBU installed. Repeat this step for the final BBU. When plugging BBUs into each other, they are rotated 180 degrees
from each other.
Step
1.
Figure 12
for the proper order.
9
Figure 12
for the proper order.
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