Replacement Of Fuse; Trackball Maintenance - Furuno COLOR VIDEO PLOTTER 1833C Operator's Manual

7. MAINTENANCE, TROUBLESHOOTING
7.3

Replacement of Fuse

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 the proper fuse.
Use of a wrong fuse can cause fire or
damage the equipment.
7.4

Trackball Maintenance

If the cursor skips or moves abnormally, you may need to clean the trackball.
1. Turn the retainer ring counterclockwise 45° to unlock it.
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
7-2
CAUTION
Part
MU3721
Retainer Ring
Display unit
Type Code No.
000-144-645