Furuno 1623 Manual De Usuario

2. MAINTENANCE, TROUBLESHOOTING 

The fuse (5 A) in the power cable protects the equipment against reverse polarity of ship’s 
mains, overcurrent, and equipment fault. If the fuse blows, find the cause before replacing it.   
 

Use of a wrong fuse may cause 
serious damage to the equipment
and void the warranty.

 
 

The table below provides simple troubleshooting procedures which the user can follow to 
restore normal operation. If you cannot restore normal operation contact your dealer for advice. 

nothing appears on the 
display or display contrast 
is poor 

• try adjusting LCD contrast. 
• battery may have discharged. 
• check if fuse has blown. 

you pressed the 
[POWER/BRILL] key to turn on 
the radar 

the control panel does not 
light 

adjust PANEL DIMMER on the   
User menu. 

the message “NO 
HEADING PULSE” or “NO 
BEARING PULSE” 
appears  

check that the antenna cable is 
firmly connected. 

the radar has warmed up and 
you pressed the [MODE] key to 
transmit 

neither noise or targets 
appear (characters and 
markers do) 

• 

try adjusting gain, A/C SEA and 
A/C RAIN. 

• 

check signal cable for damage. 

a key is pressed 

nothing happens 

key may be faulty. Contact your 
dealer. 

the display freezes 

 

Press the [MENU/ESC] key about 
five seconds to turn off the power 
and then turn it on again.