8.1 ROUTINE MAINTENANCE 
 
 
DANGER 
Never carry out internal inspection or repair work of the 
equipment by users. 
Inspection or repair work by uncertified personnel may 
result in fire hazard or electrocution. 
For inspection and repair work of equipment components, 
consult with our branch office, branch shop, sales office, or 
our distributor in your district. 
When conducting maintenance, make sure to turn the main 
power off. 
Failure to comply may result in electrocution. 
Turn off the main power before cleaning the equipment.   
Especially when a rectifier is used, make sure to turn it off 
since voltage is still outputted from the rectifier even after 
the indicator and the radar are turned off.    Failure to 
comply may result in equipment failure, or death or serious 
injury due to electric shock. 
 
 
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. 
 
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