Trackball - Furuno FCV-30 Operator's Manual

Furuno color sounder operator's manual model fcv-30

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Table of Contents

4.1.5

Trackball

If the trackball does not roll smoothly it may require cleaning. Do the following to clean the

trackball.

1. Turn the ring on the trackball 45°.

2. Clean the ball with a soft lint-free cloth, and then blow carefully into the ball-cage to

dislodge dust and lint.

3. 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.

4. Make sure that fluff from the swab is not left on the rollers.

5. Replace the ball and retainer ring. Be sure the retainer ring is not inserted reversely.

Trackball

4. MAINTENANCE & TROUBLESHOOTING

Ring

4-3

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