Furuno 1964C-BB, GD-1920C-BB Replacing the Magnetron, Replacing the Synchro Belt 1824C-BB only

8. MAINTENANCE, TROUBLESHOOTING

8.4Replacing the Magnetron

When the magnetron has expired, distant targets cannot be seen on the display. When you feel that long range performance has decreased, contact a FURUNO agent or dealer about replacement of the magnetron.

Radar model and magnetron used

Model	Magnetron Type	Code No.
MODEL 1824C-BB	E3588	000-146-866
MODEL 1834C-BB	E3571	000-146-867
	MG4004	000-158-895
MODEL 1934C-BB
	MAF1421B	000-158-786-10
	MAF1422B	000-146-871
MODEL 1944C-BB		000-158-788-10
	MG4006	000-158-896
MODEL 1954C-BB	MAF1425B	000-158-790-10
MODEL 1964C-BB	M1458F	000-158-780-10

8.5Replacing the Synchro Belt (1824C-BB only)

When the synchro belt of MODEL1824C-BB has worn out, the sweep is not synchronized with antenna rotation, which results in an abnormal picture.

When you suspect that the synchro belt has worn out, contact a FURUNO agent or dealer about replacement. (Type: 40 S2M 266UG, Code No.: 000-808-743)

8.6Trackball 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.

				CLEAR	SAVE	HIDE	A
3. Clean the ball with a soft					MOB	SHOW
	ABC	DEF	GHI
	1	2	3				B
	RANGE JKL			ALARM DISP		MENU
		MNO	PQR					Retainer Ring
lint-free cloth, and then	4	5	6				C
	STU	VWX	YZ&	GAIN
							D
	7	8	9
blow carefully into the	POWER
	TX	_'#		EBL			E
		0		VRM
					PUSH TO ENTER

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

8-3