Furuno 1933C-BB, FURUNO MARINE RADAR, 1953C-BB, 1943C-BB, 1823C-BB, 1833C-BB Trackball Maintenance

7. MAINTENANCE, TROUBLESHOOTING

7.3Trackball 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.

			CLEAR	SAVE	HIDE	A
				MOB	SHOW
ABC	DEF	GHI
1	2	3				B
RANGE			ALARM	DISP	MENU
	MNO	PQR
JKL
4	5	6				C
STU	VWX	YZ&	GAIN			D
7	8	9
POWER
TX	_'#		EBL			E
	0		VRM
				PUSH TO ENTER

Retainer Ring

Control 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. Be sure the retainer ring is not inserted reversely.

Note: Trackball maintenance parts are available as below.

Part	Type	Code No.
Retainer ring and ball	MU3721	000-144-645

offered by Busse-Yachtshop.de 7-3