Furuno FR-8062, FR-8252, FR-8122 manual Trackball Maintenance, Display unit

6. MAINTENANCE & TROUBLESHOOTING

6.5Trackball 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 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 with a cotton swab moist- ened 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.

BRILL

						GAIN
			STBY
			TX
					PUSH AUTO/MAN
			MODE			A/C SEA
			CUSTOM		PUSH AUTO/MAN
						A/C RAIN
		+			PUSH AUTO/MAN
			RANGE			F1
		-				F2
			ZOOM			OFF
						CENTER
			TARGET			TRAILS
			ALARM
			EBL			VRM
			MENU			TLL
			ENTER			CANCEL
						HL OFF
							Trackball
				Retainer ring
		Display unit
Trackball maintenance parts are available as below.
Part		Type				Code No.
Retainer ring and ball	MU3721		000-144-645

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