Furuno FCV-587 Manual De Usuario

3.  MAINTENANCE, TROUBLESHOOTING

The two fuses (Type: FGBO-A 125V 2A PBF, 
Code No.: 000-155-849-10) in the power ca-
ble assy. protect the system from reverse po-
larity of the power supply and equipment fault. 
If you cannot turn on the power, a fuse may 
have blown. FInd the cause before replacing 
the fuse. If the fuse blows after replacement, 
contact your dealer for advice.

A battery icon appears at the top of the dis-
play when the battery voltage is too high or 
too low.

The table below provides basic troubleshoot-
ing procedures which the user may follow to 
restore normal operation.

Voltage is lower than 10 VDC. If the 
voltage goes below 9 V, the equip-
ment is automatically turned off.
Voltage is higher than 32 VDC. If the 
voltage goes higher than 33 V, the 
equipment is automatically turned 
off.

Use of a wrong fuse can result in fire and 
damage the equipment.

the screen is 
blank

•  adjust the brilliance.

neither echo nor 
fixed range 
scale appears

• battery voltage.
• fuse.
• power cable assy.

no echo ap-
pears but the 
fixed range 
scale appears

•  if display advance 

speed is not set to 
[Stop].

• transducer plug.
• transducer cable.

echo appears 
but zero line 
does not

•  if range shifting is set to 

"0".

•  if zero line rejection is 

“Off”.

•  Check draft setting; it 

should be other than “0”.

sensitivity is low • gain setting.

•  if air bubbles or marine 

life is not clinging to the 
transducer face.

•  if sediments are not 

present in the water.

•  if the bottom is too soft 

to return an echo.

there is extreme 
interference or 
noise

•  if the transducer is too 

close to the engine.

•  if the unit is properly 

grounded.

•  if other echo sounders 

of the same frequency 
as own are being oper-
ated nearby.

the speed/water 
temperature 
readout is unre-
alistic or not 
present

• sensor plug.

the position 
readout is unre-
alistic or not 
present

•  the connection between 

fish finder and naviga-
tor.

• navigator.