Vislink AFD120 DBS, Technical Operation Manual

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VISLINK
Flydrive 120-150 Antenna 19
4. FLYDRIVE MAINTENANCE
The following maintenance is to be carried out every 3 months during normal service. If the
equipment is in heavy use in extreme environmental conditions, then the maintenance period
should be reduced.
WARNING: - Before carrying out any maintenance, ensure that power is disconnected
from the system.
4.1 DISH
Inspect the dish front reflecting surface for damage. Any damage may affect performance or
produce dangerous levels of RF radiation.
4.2 AZIMUTH WORM GEAR
Remove the azimuth gear cover and inspect for damage. Remove any build up of dirt from
the gears.
4.3 POLARISATION DRIVE
Remove the main cartridge cover and inspect for damage. Remove any build up of dirt from
the drive system.
If any backlash is felt in the drive then adjust the main drive belt tension to minimise any
movement.
4.4 CABLES
Remove the azimuth cable interface plate and DCU cover. Inspect all cables for damage and
replace where necessary.
4.5 FEEDHORN WINDOW
Check that the feedhorn window is not cut or damaged (Figure 9).
If the window is damaged, contact Advent Communications for a replacement.
4.6 FLEXIBLE WAVEGUIDE
Inspect all flexible waveguide for degradation of the rubber that may indicate internal damage
Replace any damaged waveguide. When replacing waveguide, check the condition of the
waveguide shims. If a metal shim is used, replace it. If gore (rubber) shims are used, then
they may be re-used if they are still in good condition (replace if not). If the gore shim being
replaced is bonded in place, any adhesive left on the flange surface should be cleaned off
using isopropyl alcohol or similar prior to fitting the new shim.