Place the rack-mounted system or expansion unit in the service position

You might need to perform service or gain access to internal components by placing the rack-mounted system or expansion unit in the service position. Use the procedure in this section to accomplish this task.

1. If necessary, open the front rack door.
2. Remove the two thumbscrews A that secure the system or expansion unit B to the rack as shown in the following figure.
   
3. Release the rack latches A on both the left and right sides as shown in the following figure.
   
4. Review the following note, and then slowly pull the system or expansion unit out from the rack until the rails are fully extended and locked.
   Note:

   • If the procedure you are performing requires you to unplug cables from the back of the system or expansion unit, do so before you pull the unit out from the rack.
   • Ensure that the cables at the rear of the system or expansion unit do not catch or bind as you pull the unit out from the rack.
   • Ensure the rails are fully extended. When the rails are fully extended, the rail safety latches lock into place. This action prevents the system or expansion unit from being pulled out too far.