Removal and replacement of ADU modules
8-40
Chapter 8: Service & maintenance
98-137654-A
4. Tighten the belt tension device by tightening the 4x4 mm Allen
screws (thread size M5).
5. Check the tension of the belt again (90-100 Hz). If needed, repeat
the tension adjustment.
8.5.6.5 Removing the Azimuth Encoder
To remove the Azimuth Encoder, do as follows:
1. Open the service hatch by releasing the two latches with Torx
screws.
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 (available in some
antennas) to locked position.
5. Rotate the antenna pedestal so that the Azimuth DDM faces from
the service hatch.
Figure 8-43: Azimuth motor, tighten the belt tensioner
Tools needed:
• 4 x 150 mm Allen key
(located inside the
service door of the ADU)
• Acoustic frequency meter
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