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14. MAINTENANCE, TROUBLESHOOTING
14-3
14.4 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.
14.4.1 General troubleshooting
14.4.2 Radar troubleshooting
14.4.3 Plotter troubleshooting
Problem Remedy
You can not turn on the power. • Check for blown fuse.
• Check that the power connector is tightly fastened.
• Check for corrosion on the power cable connector.
• Check for the power cable for damage.
• Check battery for correct voltage output.
• Use bare finger to turn on the power. (The power cannot be
turned with gloved hands.)
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 into the power source.
The display has frozen. Push the power switch until the power goes off. Turn the power
on again.
Problem Remedy
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 tightly fastened.
• Check if the radar source is correct.
Marks and characters appear,
but echoes do not appear.
Check that the antenna cable is tightly fastened.
Picture is not updated or the
picture freezes.
• Check the antenna cable for damage, loose connection.
• If the picture has frozen, turn the power off and on again.
You tuned the receiver, but the
sensitivity is weak.
The life span of the magnetron is over. 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.
The overload protection has activated. To restore normal opera-
tion, turn off all equipment in the network. Wait a few seconds then
turn on all the equipment.
Problem Remedy
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.
Check if [Tracks] is turned on in the [Layers] menu.