Furuno 1753C, 1742, 1733C, 1752, 1723C, 1762C, 1722C, 1763C, 1732C Sounder troubleshooting

7. MAINTENANCE, TROUBLESHOOTING

7.4.4Sounder

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

Sounder troubleshooting

If…	But…	Then…
If you selected a	no sounder display appears	! check that the signal cable between the
sounder display with the		network sounder and this equipment is
DISP key		firmly fastened.
		! check that the network sounder is
		plugged in. The LED of the network
		sounder should flash every second.
		! Check that sounder source is correct.
marks and characters	picture does not appear	! check for loosened transducer connector.
appear
picture appears	zero line does not appear	! the picture is shifted. confirm the shift
		setting
picture sensitivity is too	—	! check gain setting, if using manual
low		operation.
		! marine life or air bubbles may be clinging
		to transducer face.
		! bottom may be too soft to return a
		suitable echo.
depth is not displayed	—	! adjust gain to display the bottom echo (in
		reddish brown on the color model), if
		you are using the manual sounder
		mode.
		! correctly display bottom echo on the
		display, if you are using manual sounder
		mode.
		!confirm that ETR is selected at DEPTH
		SOURCE on GENERAL SETUP menu.
noise or interference	—	! check to be sure the transducer cable is
shows on the display		not near ship’s engine.
		! check the ground.
		! other video sounders of the same
		frequency as yours may be operating
		near you.
water temperature graph	—	! check that sensor cable is tightly
appears but wrong or no		fastened.
readout		!confirm that ETR is selected at DEPTH
		SOURCE on GENERAL SETUP menu.

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