Furuno 1944C-BB manual Simple Troubleshooting, General troubleshooting, Radar troubleshooting

8. MAINTENANCE, TROUBLESHOOTING

8.7Simple Troubleshooting

This section provides simple troubleshooting procedures which the user can follow to restore normal operation. If you cannot restore normal operation do not attempt to check inside the unit. Any trouble should be referred to a qualified technician.

8.7.1 General

		General troubleshooting
If…		Then…
you cannot turn on the	•	check for blown fuse.
power	•	check that the power connector is firmly fastened.
	•	check for corrosion on the power cable connector.
	•	check for damaged power cable.
	•	check battery for proper voltage output (10.8 to 31.2 V).
there is no response	•	turn off and on the power. If there still is no response the key may
when a key is pressed		be faulty. Request service.

8.7.2Radar

GD-1920C-BB requires a network radar.

Radar troubleshooting

If…	But…		Then…
you pressed the POWER/TX	nothing appears on the	•	check that the antenna cable is
key and the C: RADAR TX	display	•	firmly fastened.
soft key to show the radar			check if radar source is correct.
picture
marks, legends appear	no echo appears	•	check that the antenna cable
			is firmly fastened.
the picture is not updated or	—	•	check antenna cable.
it freezes		•	for freeze up, turn the
			processor unit on and off
			again.
tuning is adjusted	sensitivity is poor	•	magnetron may need to be
			replaced. Contact your dealer.
the range is changed	radar picture does not	•	try to hit the [+] and [-] keys
	change	•	again.
			turn the processor unit on and
			off again.
there is poor discrimination in	—	•	adjust A/C SEA.
range
the true motion presentation	—	•	reselect true motion mode.
is not working properly		•	check if heading and speed are
			input.
the range rings are not	—	•	hit the B: RADAR DISPLY and
displayed			C: RINGS soft keys to display
			them.

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