Furuno manual Replacement the Magnetron, Replacement the Synchro Belt 1823C only

7. MAINTENANCE, TROUBLESHOOTING

7.4Replacement 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.

Model	Magnetron Type	Code No.
MODEL1823C	E3588	000-146-866
MODEL1833C	E3571	000-146-867
MODEL1933C	MAF1421B	000-147-385
MODEL1943C	MAF1422B	000-146-871
MODEL1953C	MAF1425B	000-146-872

7.5Replacement the Synchro Belt (1823C only)

When the synchro belt of MODEL1823C 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)

7.6Trackball 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.

Retainer Ring

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. 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

7-3