JMA-2343/2344 - ProNav

5.2 Scanner Unit
WARNING
When performing maintenance or inspection of the scanner unit, be sure to shut
off the main power source. Sudden movement of the scanner may cause
collision and injury to the human body.
Be sure to shut off the main power source when approaching the scanner unit for
the purposes of maintenance or inspection. Exposure to electric waves at
proximate distances may negatively affect the human body.
(1) Radiation unit
If the front of the radiation unit is soiled with soot, salt, paint specks, bird excrement or
other alien matter, electric waves may become attenuated and reflection may occur thus
causing degradation in the performance of the radar.
The radiation unit should be inspected and always kept clean by wiping with cloth
soaked in alcohol or water in the event of soiling.
Solvents such as gasoline, benzene, trichlene or ketone should never be used for this
purpose.
(2) Pedestal
The pedestal and attachment bolts of the scanner unit should be inspected periodically
for erosion and maintained to ensure safety. Painting is the best measure for preventing
erosion and it is recommended that this be undertaken once in half a year.
5.3 Display Unit
Cleaning the cathode-ray tube
When dust adheres to the cathode-ray tube, transparency degrades and the images
become dark.
Cleaning is performed using cloth soaked in water (flannel or cotton). Wiping
vigorously with dry cloth or the use of gasoline or thinner should be avoided.
CAUTION
Vigorous wiping with dry cloth or the use of gasoline or thinner should be
avoided in cleaning the cathode-ray tube.
Such action may cause scratches and deterioration.
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