Furuno 1823C manual Simple Troubleshooting, General troubleshooting, Radar troubleshooting

7. MAINTENANCE, TROUBLESHOOTING

7.7Simple 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.

7.7.1General

	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.

7.7.2Radar

GD-1900C requires a network radar.

Radar troubleshooting

If…	But…	Then…
you pressed the	nothing appears on the	• check that the antenna cable is
[POWER/BRILL] key and the	display	firmly fastened.
RADAR TX soft key to show		• check if radar source is correct.
the radar picture
marks, legends appear	no echo appears	• check Tx fuse in power cable.
		If it is blown, replace it.
the picture is not updated or	—	• check antenna cable.
it freezes		• for freeze up, turn the display
		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 display unit off and on
		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 RADAR DISPLY and
displayed		RINGS soft keys to display
		them.

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