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6.2.1 Scanner Unit NKE-1055 ／ 1056
WARNING
Before starting maintenance of the scanner unit, be sure to turn off the main power source,
otherwise you may get an electric shock or be injured.
Be sure to set the safety switch for stopping the scanner unit to "OFF", otherwise you may
be injured.
After maintenance, set the safety switch for stopping the scanner unit to "ON" (see Figs. 6.1 and 6.2).
1) Front Radiating Window
If the front radiating window is soiled with soot, salt, dust, paint or bird's dropping, radarbeam will be
attenuated or reflected and radar performance will be degraded.
Check the radiating window, and if it is soiled, wipe it with a soft cloth wetted with alcohol or water
and try to keep it clean all the time.
Never use solvents of gasoline, benzine, trichloroethylene or ketone for cleaning, otherwise the radiant
plane will be deteriorated.
2) Scanner Unit Mechanism
(1) Oiling to Gear
Apply grease evenly to the main shaft driving gear and the encoder driving gear by using a spreader
or brush. Greasing at short intervals is effective to prevent gears from wear and to extend the service
life. Make it a rule to grease them every six months at least.
Use Mobilux 2 of Mobile Oil.
(2) Mounting Legs
Check the Mounting legs and mounting bolts of the scanner unit frame at a certain interval for corrosion
and keep them in order. Apply paint to them every six month because painting is the best measure
against corrosion.
(3) Motor
Check the brush and commutator contact every 200 operating hours and replace it if the brush extremely
wears (a spare is attached). The brush service life is approximately 3,000 hours. Replace the brush
when it has worn to the notch at the two-thirds of the total length (see Fig. 6.3).
6.2 Maintenance of Each Unit
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