COBHAM Sailor 900 VSAT, Technical Manual

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Removal and replacement of ADU modules
98-133966-G1 Chapter 8: Service & maintenance 8-25
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Service & maintenance
8.5.2.2 Tools needed
Have the following tools ready at hand when starting to replace
modules:
• 4x150 mm Allen key (located inside the service door of the ADU)
• Torx 20 screw driver
• Flat head screw driver
• 8 mm open-end spanner
• 11 mm open-end spanner
• 18 mm open-end spanner
• Acoustic frequency meter
8.5.3 Replacing the GPS module
The GPS Module is equipped with a receiver antenna (on top side)
receiving the signals transmitted from the GPS satellites (low orbit),
typical 10-12 are visible above the horizon. On the opposite side
(bottom side) of the GPS Module the engine is located. It converts the
GPS satellite signals into current position data (latitude, longitude and
level). A minimum of 4 GPS satellites should be seen by the GPS Module
to produce a valid position.
The GPS module is identical to the ones used in Thrane & Thrane SAILOR
FleetBroadband products.
To replace the GPS module, 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.
Figure 8-23: GPS module
Top view
Bottom view
Tools needed:
• 4x150 mm Allen key
(located inside the service
hatch of the ADU).
SAILOR900TM.book Page 25 Monday, September 16, 2013 11:01 AM