Training, Installation & Service Manual - Livewire Connections Ltd

Removal and replacement of ADU modules
9.5.4.2 Inserting a new Cross Elevation DDM
To insert a new DDM follow the instructions above in reverse order.
9.5.4.3 Removing the Elevation DDM
Tools needed:
• 4 x 150 mm Allen key
(located inside the
service door of the ADU)
• Flat head screw driver
To replace the Elevation DDM, do as follows:
1. Open the service hatch by releasing the two latches.
2. Switch off the power to the antenna on the service switch.
Figure 9-25: Location of the Elevation DDM
3. Rotate the antenna pedestal so that the arm with the GPS module
faces the service hatch.
4. Disconnect the 3 connectors at the front of the Elevation DDM,
then the 2 SUB-D connectors at the rear of the Elevation DDM.
Figure 9-26: Elevation DDM, connectors
5. Remove the 4x4 mm Allen screws (visible when the connectors
are removed) and remove the Elevation DDM.
9-26 Chapter 9: Service & maintenance 98-133966-E2