4 trackball maintenance – Furuno GP-3500F User Manual
Page 221
12. MAINTENANCE & TROUBLESHOOTING
12-3
12.4 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.
Retainer ring
Ball
Display unit
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.
Note: Trackball maintenance parts are available as below.
Part Type
Code
No.
Retainer ring and ball
MU3721
000-144-645
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- CH-300 (124 pages)
- NX-300 (65 pages)
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- GP-1850WDF (115 pages)
- GP-3500 (192 pages)
- GP-1850WD (44 pages)
- GP-1850W (98 pages)
- GP-1850WD (98 pages)
- GP-1850W (4 pages)
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- GP-31 (2 pages)
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- GP-7000 (28 pages)
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- GP37 (2 pages)
- GP-90 (36 pages)
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- GP-1850DF (63 pages)
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- GP-30 (2 pages)
- FCV-30 (110 pages)
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- LC-90 MARK-II (2 pages)
- GP-1650W (44 pages)
- DD-80 (119 pages)
- RP-250 (73 pages)
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