Removal and replacement of ADU modules
8-38 Chapter 8: Service & maintenance 99-145912-A
2. Tighten the 4x4 mm Allen screws from the motor assembly.
8..6.7.2 To replace the Azimuth Motor
To remove the Azimuth Motor, do as follows:
1. Open the service hatch.
2. Switch off the power to the antenna on the service switch.
3. Rotate the antenna dish to top position.
4. Press in and turn the elevation locking pin to locked position.
5. Rotate the antenna pedestal so that the Azimuth DDM faces from
the service hatch.
Figure 8-39: Elevation motor and encoder, tighten the screws for the motor
assembly
Tools needed:
•TX20
• 4 x 150 mm Allen key
(located inside the service
door of the ADU)
• Acoustic frequency meter
Figure 8-40: Elevation locking pin