Furuno 1834C-BB User Manual

8. MAINTENANCE, TROUBLESHOOTING 

This section provides simple troubleshooting procedures which the user can 
follow to restore normal operation. If you cannot restore normal operation do not 
attempt to check inside the unit. Any trouble should be referred to a qualified 
technician.  
 

you cannot turn on the 
power 

•  check for blown fuse. 
•  check that the power connector is firmly fastened. 
•  check for corrosion on the power cable connector. 
•  check for damaged power cable. 
•  check battery for proper voltage output (10.8 to 31.2 V). 

there is no response 
when a key is pressed 

•  turn off and on the power. If there still is no response the key may 

be faulty. Request service. 

 

GD-1920C

-BB requires a network radar. 

you pressed the POWER/TX 
key and the C: RADAR TX 
soft key to show the radar 
picture  

nothing appears on the 
display 

•  check that the antenna cable is 

firmly fastened. 

•  check if radar source is correct.

marks, legends appear  no echo appears 

•  check that the antenna cable 

is firmly fastened.

the picture is not updated or 
it freezes 

— 

•  check antenna cable. 
•  for freeze up, turn the 

processor unit on and off 
again. 

tuning is adjusted 

sensitivity is poor 

•  magnetron may need to be 

replaced. Contact your dealer. 

the range is changed 

radar picture does not 
change 

•  try to hit the [+] and [-] keys 

again. 

•  turn the processor unit on and 

off again. 

there is poor discrimination in 
range 

— 

•  adjust A/C SEA. 

the true motion presentation 
is not working properly 

— 

•  reselect true motion mode. 
•  check if heading and speed are 

input. 

the range rings are not 
displayed 

— 

•  hit the B: RADAR DISPLY and 

C: RINGS soft keys to display 
them.