Furuno FS-1575 FS-2575 FS-5075 User Manual

11.  MAINTENANCE & TROUBLESHOOTING

Regular maintenance helps to keep your equipment in good condition and prevents 
future problems. Check the items shown in the table below.

Antenna

Check for physical damage and corro-
sion.

Replace damaged parts.

Wire antenna

Check that the antenna is properly 
spanned and separated sufficiently 
from metallic structures.

If necessary, re-span antenna.

Insulators for 
antenna

Check for salt water deposits on insula-
tors. Check that connection at the lead-
in insulator is tight and rust-free.

Replace damaged insulator(s). Re-
move salt water deposits. Clean with 
fresh water, then dry. Remove rust, 
then tighten bolts and lock nuts. Cover 
metallic surface with sealing compound.

Antenna cou-
pler

•  Check condition of antenna terminal, 

ground, coaxial cable and control ca-
ble.

•  Check that coupler lid and cable 

glands are firmly secured.

•  Check for physical damage, corro-

sion and salt water deposits.

•  Tighten the loosened connections.
•  Fasten the lid firmly and evenly to 

prevent water leakage.

•  Replace if damaged.

Control unit

•  Check ground connection, control ca-

ble, and external equipment.

•  Confirm that there are no objects on 

the top of the control unit.

•  Remove dust from control unit with 

soft cloth.

Note: Do not use chemical cleaners to 
clean the control unit; they can remove 
paint or markings and deform the equip-
ment.

•  Tighten the loosened connections; 

remove foreign materials from con-
nectors.

•  Remove any objects.
•  Wipe the LCD carefully to prevent 

scratching, using tissue paper and an 
LCD cleaner. To remove dirt or salt 
deposits, use an LCD cleaner, wiping 
slowly with tissue paper so as to dis-
solve the dirt or salt. Change paper 
frequently so the salt or dirt does not 
scratch the LCD.

Transceiver 
unit

•  Check connection at signal cable, co-

axial cable, control cable, power ca-
ble, and navigator.

•  Confirm that there are no objects on 

the top of the cabinet.

•  Tighten loosened connections; re-

move foreign materials from connec-
tors.

•  Remove any objects.

Power supply

Check that the supply voltage at trans-
mission is within the rated range (21.6 
to 31.2 VDC at the power connector).

If not within the range, check power 
source. Low voltage may cause erratic 
operation.