Furuno 1724C, 1734C manual Radar troubleshooting, Plotter troubleshooting, If… But…

8. MAINTENANCE, TROUBLESHOOTING

8.5.2Radar

GD-1720C requires a network radar.

Radar troubleshooting

If…	But…
you pressed the	nothing appears on the
POWER/BRILL key and the	display
RADAR TX soft key to show
the radar picture
marks, legends appear	no echo appears
the picture is not updated or	—
it freezes
tuning is adjusted	sensitivity is poor
the range is changed	radar picture does not
	change
there is poor discrimination in	—
range
the true motion presentation	—
is not working properly
the range rings are not	—
displayed

Then…

•check that the antenna cable is firmly fastened.

•check if radar source is correct.

•check that the antenna cable is firmly fastened.

•check antenna cable.

•for freeze up, turn the display unit on and off again.

•magnetron may need to be replaced. Contact your dealer.

•try to hit the [+] and [-] keys again.

•turn the display unit off and on again.

•adjust A/C SEA.

•reselect true motion mode.

•check if heading and speed are input.

•hit the RADAR DISPLY and RINGS soft keys to display them.

8.5.3Plotter

Requires a FURUNO BB GPS receiver.

		Plotter troubleshooting
If…		Then…
position is not fixed within	•	check that antenna connector is firmly fastened.
three minutes	•	check number of satellites received, on the GPS status display. (See
		page 8-11.) There should be three or more.
position is wrong	•	check that the correct geodetic chart system is selected, on the GPS
		SENSOR SETTINGS menu.
	•	enter position offset, on the GPS SENSOR SETTINGS menu.
the track is not plotted	•	track is not being plotted. (“H” icon appears at the top of the display.)
		Press the TRACK HALT soft key on the TRACKS & MARKS CONTROL
		menu to start plotting again.
the bearing is wrong	•	check that correct magnetic variation is entered, on the GENERAL
		SETUP menu.
Loran C (or Decca) TDs do	•	check that LORAN C (or DECCA) is selected at TD DISPLAY on the
not appear		GENERAL SETUP menu. Also, check that proper Loran C (Decca) chains
		codes are entered, on the TD SETUP menu.
Loran C (or Decca) TDs	•	enter TD offset, on the TD SETUP menu.
are wrong
the ship’s speed indication	•	try to decrease speed/course smoothing, on the GPS SENSOR
is not zero after the ship is		SETTINGS menu.
stopped

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