Why Furuno Marine Radar is properly tuned but has poor sensitivity?
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Monica SmithSep 16, 2025
If your Furuno Marine Radar is properly tuned but has poor sensitivity, it could be due to several reasons: a deteriorated magnetron, a detuned MIC, dirt on the radiator face, water ingress to the waveguide or other feeder line, or the second trace echo rejection being ON. With the radar transmitting on 48 nm range, check the magnetron current; if it's below normal, the magnetron may be defective and should be replaced. Check the MIC detecting current; if it's below normal, the MIC may have become detuned and must be tuned. Clean the radiator surface. Remove water from the feeder line. Disable the second-trace echo rejector.
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thomas25Sep 17, 2025
Why Furuno Marine Radar interference rejector is inoperative?
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Aaron YangSep 18, 2025
If the interference rejector is inoperative (interference rejection level not displayed) on your Furuno Marine Radar, the issue is with the SPU board. Replace the SPU board.
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Alexis ButlerSep 18, 2025
Why Furuno Marine Radar echo stretch is ineffective?
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Kevin StevensSep 18, 2025
If the echo stretch is ineffective (neither ES1, ES2 nor ES3 is displayed) on your Furuno Marine Radar, the issue is with the SPU board. Replace the SPU board.
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Crystal StephensSep 18, 2025
What to do if Furuno Marine Radar range rings are not displayed?
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Andrew SimsSep 22, 2025
If the range rings are not displayed on your Furuno Marine Radar, it could be due to adjusting the brilliance of range rings on the BRILL menu to see if intensity is increased or SPU board. Replace associated circuit board if unsuccessful. Replace the SPU board.
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Ms. Carol Navarro DDSSep 23, 2025
What causes poor discrimination in range on Furuno Marine Radar?
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laurenkiddSep 23, 2025
Poor discrimination in range on your Furuno Marine Radar can be caused by sea clutter control not functioning properly. This can be due to improper setting of A/C SEA. If A/C SEA is seen only at very close range, suspect inaccurate frequency of reference oscillator.
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Francisco HerreraSep 23, 2025
Why Furuno Marine Radar true motion presentation not working correctly?
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Laura MaldonadoSep 23, 2025
If the true motion presentation is not working correctly on your Furuno Marine Radar, it could be due to poor contact of the MODE key (full keyboard), the selection not being accessed, incorrect speed entry, or inaccurate TM display. Try to press the MODE key a little harder. Press the MODE key or operate the PRESENTATION MODE box until TM appears. Enter the correct own ship speed. Make sure that speed and compass inputs are accurate.
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Dr. Denise JohnsonSep 23, 2025
What to do if buttons on Furuno Marine Radar trackball module operated but no response?
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lwhiteSep 23, 2025
If the buttons on the trackball module are operated but there is no response on your Furuno Marine Radar, the issue is with the trackball module. Replace the trackball module.
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Tony JohnsonAug 23, 2025
How to fix Furuno Marine Radar when the power cannot be turned on?
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Cynthia GuzmanAug 23, 2025
If your Furuno Marine Radar isn't powering on, the issue might stem from a few causes: the power connector may have loosened, the ship’s mains could be off, or a fuse might have blown. To resolve this, check the connector to ensure it's properly secured. Verify that the ship’s mains are active and providing power. Lastly, inspect the fuse and replace it if necessary.
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nicole17Sep 6, 2025
Why Furuno Marine Radar antenna not rotating?
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Susan SampsonSep 6, 2025
If the antenna on your Furuno Marine Radar isn't rotating, it could be due to the antenna drive mechanism or a defective antenna drive motor relay. Replace the antenna drive mechanism. Press the relay reset button.
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Cody RothSep 5, 2025
Why symbol of user chart cannot be erased on Furuno Marine Radar?
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thomasterrySep 5, 2025
If a symbol of user chart cannot be erased on your Furuno Marine Radar, it could be because "Enable changes" is not selected, or symbols may be superimposed by one another. Select "Enable changes" in the User Chart menu. Click the Delete button on the Symbol page several times.
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