16. MAINTENANCE, TROUBLESHOOTING
16-4
16.4.2 Radar troubleshooting
16.4.3 Plotter troubleshooting
16.4.4 Fish finder troubleshooting
Problem Remedy
The radar cannot transmit. • 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 the antenna cable for damage and loose connection.
• If the picture is frozen, turn the power off and on again.
Picture is not updated or the
picture freezes.
• Check the antenna cable for damage and loose connection.
• If the picture has frozen, turn the power off and on again.
You adjusted the receiver gain,
but radar echoes are too weak.
The life span of the magnetron in the radar sensor 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.
Forgot the chart unlock code, or
chart lock is reset.
Connect to the internet, then tap [Home][Catalog][Download
codes]. The codes are automatically applied.
Problem Remedy
You selected a fish finder dis-
play, but no picture appears.
• Check that the transducer cable is tightly fastened.
• Check that the fish finder source is correct.
• If you are using a network fish finder, check that it is properly
connected.
Marks and characters appear,
but no picture appears.
Check if the transducer cable is tightly connected.
Picture appears but zero line
does not appear.
• The picture is shifted. Check the shift setting.
• Check if the draft setting ([Settings] - [Sounder] - [Transducer
Draft]) is zero or higher.
The picture sensitivity is too
low.
• If you are in the manual mode, check the gain setting.
• Check the transducer face for marine life and air bubbles.
• Bottom is too soft to return an acceptable echo.
The depth indication does not
appear.
• For manual operation, adjust the gain and range to display the
bottom echo in reddish-brown.
• Adjust the bottom level HF/LF.
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