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3. Loosen the screw at the back of the top cover, and then pull the top cover to remove
it.
4. Loosen the 6 screws locking the PA heatsink, remove all power, data and RF cables
from the PA, and finally remove the PA heatsink.
5. Mount the duplexer, and fasten the 2 screws inside the housing and on the side panel
respectively. Then mount the PA heatsink, and connect all the lines and cables.