Furuno 1833C Manuel D’Utilisation

7. MAINTENANCE, TROUBLESHOOTING 

 
 

The fuse on the power cable protects the equipment from reverse polarity of the 
ship’s mains and equipment fault. If the fuse blows, find out the cause before 
replacing it. Use the correct fuse (15A for 12 V device, 7A for 24 V device). 
Using the wrong fuse will damage the equipment and void the warranty. 

Use of a wrong fuse can cause fire or
damage the equipment.

 

 

If the cursor skips or moves abnormally, you may need to clean the trackball. 
   
1.  Turn the retainer ring counterclockwise 45° to unlock it. 

Retainer Ring

2.  Remove the retainer ring and ball. 
3.  Clean the ball with a soft lint-free cloth, and then blow carefully into the 

ball-cage to dislodge dust and lint. 

4.  Look for a build-up of dirt on the metal rollers. If dirty, clean the rollers using a 

cotton swab moistened lightly with isopropyl-rubbing alcohol. 

5.  Make sure that fluff from the swab is not left on the rollers. 
6.  Replace the ball and retainer ring. Be sure the retainer ring is not inserted 

reversely. 

 
Note: Trackball maintenance parts are available as below. 

Retainer ring and ball 

MU3721 

000-144-645