Chapter 4  MAINTENANCE 
4.1  ROUTINE MAINTENANCE 
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INSTRUCTION MANUAL 
Chapter 4 MAINTENANCE 
 
4.1  ROUTINE MAINTENANCE 
DANGER
 
 
Never conduct inspection or repair work of equipment components. 
Inspection or repair work by unauthorized personnel may result in 
fire hazard or electric shock. 
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 output from the rectifier even after the radar is turned off. 
Failure to comply may result in equipment failure, 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.