Furuno GD-1920C-BB Radar Detector User Manual


 
8. MAINTENANCE, TROUBLESHOOTING
8-6
8.7.4 Sounder
Requires Network Sounder ETR-6/10N/30N.
Sounder troubleshooting
If… But… Then…
you selected a sounder
display with the DISP key
picture does not appear
check that the network
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
appear
picture does not appear
check for loosened transducer
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
displayed
adjust gain and range to display
the bottom echo (in reddish
brown), if you are using the
manual sounder mode.
noise or interference shows
on the display
check to be sure the transducer
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
appears
data is wrong
check that sensor cable is tightly
fastened.