Furuno USA Inc 9ZWRTR104 ユーザーズマニュアル

14.  MAINTENANCE, TROUBLESHOOTING

This section provides simple troubleshooting procedures that the user can follow to re-
store normal operation. If you cannot restore normal operation, do not check inside the 
unit. Have a qualified technician check the equipment.

You can not turn on the power.

•  Check for blown fuse.
•  Check that the power connector is fastened.
•  Check for corrosion on the power cable connector.
•  Check for damaged power cable.
•  Check battery for correct voltage output.

Picture is not displayed properly.

Turn off and on the power. If the picture is still improper, contact 
your dealer for instructions.

Nothing appears on the screen 
after you press the power switch.

Check if the unit is plugged in.

The display has frozen.

Push the power switch until the screen goes blank. Turn the 
power on again.

You tapped the [TX] icon on the 
radar display to transmit but 
nothing happens.

•  Tap the [TX] icon again. (The icon is filled in white when the ra-

dar is in transmit state.)

•  Check that the antenna cable is fastened.
•  Check if the radar source is correct.

Marks and characters appear, 
but echoes do not appear.

Check that the antenna cable is fastened.

Picture is not updated or the 
picture freezes.

•  Check antenna cable.
•  If the picture has frozen, turn the power off and on again.

You tuned the receiver, but the 
sensitivity is weak.

The magnetron may have reached its life. Have a technician 
check the magnetron.

You changed the range, but the 
radar picture does not change.

•  Try to change the range again.
•  Turn the power off and on again.

Poor discrimination in range.

Adjust the sea control.

Range rings are not displayed.

Check if [Range Rings] is turned on in the [Layers] menu.

You tapped the [TX] icon to 
transmit. The "TX screen" ap-
pears momentarily, but the ra-
dar soon goes into stand-by.

This problem indicates that the overload protection has activated. 
To restore normal operation, turn off all equipment in the network. 
Wait a few seconds then turn on all the equipment.

Position is not fixed.

Check for interfering objects near the display unit that might be 
blocking reception.

The track of your ship is not 
plotted.

The track display may be disabled. Check if [Tracks] is turned on 
in the [Layers] menu.