8-1 
Never carry out internal inspection or repair work 
of the equipment by users. 
Inspection or repair work by unauthorized 
personnel may result in fire hazard or electric 
shock. 
Ask the nearest branch, business office or a 
dealer for inspection and repair. 
 
Turn off the main power before maintenance 
work. Otherwise, an electric shock may result. 
 
Turn off the main power before cleaning the 
equipment. Especially, make sure to turn off the 
indicator if a rectifier is used. Otherwise, 
equipment failure, or death or serious injury due 
to electric shock may result, because voltage is 
outputted from the rectifier even when the radar 
is not operating. 
8.1  ROUTINE MAINTENANCE 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
For operating the radar equipment in the good conditions, it is necessary to make the maintenance work as 
described below. If maintenance is made properly, troubles will reduce. It is recommended to make regular 
maintenance work. 
Common points of maintenance for each unit are as follow: 
 
Clean the equipment. 
 
Remove the dust, dirt, and sea water rest on the equipment cabinet with a piece of dry cloth. 
Especially, clean the air vents with a brush for good ventilation. 
WARNING