4-46 
 
(4)  Take out the fuse and check if it is blown. 
If it is blown, replace it. 
 
 
 
 
 
 
 
(5)  Similarly, check the three other fuses. 
 
 
[Mounting] 
(1)  Assemble the unit in reverse order of removal. 
(2)  Start the equipment, and set the true bearing value. 
 
 
[Operation check] 
(1)  Check that an error message is not displayed. 
(2)  The true bearing value is traced correctly. (Resolution, and rotation direction)