8.4.3  Replacement of Motor 
 
Caution:  Replacement of motor must be made by specialized service personnel. 
  For details, refer to Service Manual. 
 
Motor Replacement Procedure for Scanner Unit NKE-1130 (JMA-5332-12) 
 
 
(1)  Before starting part replacement work, turn off the 
safety switch of the scanner unit. 
Bow side 
Turn off the safety 
switch. 
 
  The safety switch is located on the rear (stern) side.   
Remove the cover and turn off (to the lower side) the 
safety switch. 
 
 
 
 
 
 
 
 
 
 
 
(2)  Loosen the hexagonal bolts and remove the cover on the 
both sides 
Remove the eight 
hexagonal screws. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(3)  Remove the cover on the right (starboard) side and 
loosen the four screws (M4) to remove the driver   
Driver circuit board 
Disconnect the 
cables. 
unit, which has the motor driver circuit board on its back 
side. 
Disconnect the cables connecting the motor to the motor 
driver circuit board. 
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