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8.5    Replacement of Major Parts
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Magnetron Replacement Procedure for Scanner Unit NKE-1130 
 
 
(1)  Before starting part replacement work, 
turn off the safety switch of the scanner 
unit. 
 
  The safety switch is located on the rear (stern) side. 
Remove the cover and turn off (to the lower side) 
the safety switch. 
 
 
 
 
 
 
 
 
 
 
(2)  Remove the pedestal cover. 
 
  Remove the cover on the left (port) side. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(3)  Check that there is no remaining 
electric charge in the modulation 
high-voltage circuit board. 
 
  Remove the two screws (M4) holding the 
magnetron cables (both yellow and green). 
 
 
 
 
 
 
 
 
 
 
 
Remove the eight 
hexagonal screws. 
Removing the port side cover 
Bow side 
Turn off the safety 
switch. 
Magnetron 
Remove the 
yellow cable. 
Remove the 
green cable. 
Remove the 
two screws.