Furuno 1734C, 1724C manual Sounder troubleshooting, If… But… Then…

8. MAINTENANCE, TROUBLESHOOTING

8.5.4Sounder

Requires Network Sounder ETR-6/10N/30N.

Sounder troubleshooting

If…	But…		Then…
you selected a sounder	picture does not appear	•	check that the network
display with the DISP key			sounder’s signal cable is firmly
			fastened.
		• Check that sounder source is
			correct.
		• check that the network sounder
			is plugged in. The LED on the
			network sounder should flash
			every second.
marks and characters	picture does not appear	•	check for loosened transducer
appear			connector.
the picture appears	zero line does not appear	•	the picture is shifted. Confirm
			shift setting.
picture sensitivity is too low	—	•	check gain setting, if using
			manual operation.
		• marine life or air bubbles may
			be clinging to transducer face.
		• bottom may be too soft to
			return a suitable echo.
the depth indication is not	—	•	adjust gain and range to display
displayed			the bottom echo (in reddish
			brown), if you are using the
			manual sounder mode.
noise or interference shows	—	•	check to be sure the transducer
on the display			cable is not near ship’s engine.
		•	check the ground.
		• other video sounders of the
			same frequency as yours may
			be operating near you.
the water temperature graph	data is wrong	•	check that sensor cable is
appears			tightly fastened.

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