Furuno 1834C-BB ユーザーズマニュアル

8. MAINTENANCE, TROUBLESHOOTING 

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

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.