Why are range rings not displayed on my Furuno FAR-2228?
If range rings are not displayed on your Furuno Marine Radar, one possibility is to adjust the brilliance of range rings on the BRILL menu to see if intensity is increased. If this is unsuccessful, consider replacing the associated circuit board or the MAIN board.
What to do if Furuno Marine Radar picture is not updated or freezes?
If the picture on your Furuno Marine Radar is not updating or is frozen, the issue might be a video freeze. Turn the power off and on again to restore normal operation.
What causes marks, indications, and noise but no echo on Furuno FAR-2228?
If you are seeing marks, indications, and noise but no echo on your Furuno Marine Radar, the Tx high voltage protection circuit may have activated. Reset the power to restore normal operation.
How to display range rings on Furuno FAR-2228 Marine Radar?
If range rings are not displayed on your Furuno Marine Radar, it may be because they are turned off. Try turning on the range rings with [RANGE RING] in the [NAVTOOL] menu. If they still do not appear, their brilliance may be too low; adjust their brilliance in the [BRILL] menu.
Why is my Furuno FAR-2228 properly tuned but has poor sensitivity?
If your Furuno Marine Radar is properly tuned but has poor sensitivity, possible causes include 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 active. Consider the following:1. Check magnetron current with the radar transmitting on 48 nm range. If the current is below normal, the magnetron may be defective and need replacement.2. Check the MIC detecting current. If it is below the normal value, the MIC may have become detuned and needs tuning.3. Clean the radiator surface.4. Remove water from the feeder line.5. Disable the second-trace echo rejector.
What to do if range changed but radar picture does not change on Furuno FAR-2228 Marine Radar?
If the range is changed but the radar picture does not change on your Furuno Marine Radar, it could be due to a defective range key or a video freeze-up. Try adjusting the range with the control unit or the [RANGE] box several times. If that does not work, try turning the power off and on again to see if the problem might be video freeze up. If still unsuccessful, the keypad may need replacement.
General| Type | Marine Radar |
|---|---|
| Antenna Type | Open Array |
| AIS Display | Yes |
| Operating Temperature | -15°C to +55°C |
| Range Scales | 0.125, 0.25, 0.5, 0.75, 1.5, 3, 6, 12, 24, 48 nautical miles |
| Target Tracking | Yes |
| Antenna Rotation Speed | 24 RPM |
| Range Resolution | Approx. 20 m |
| Frequency | 9.4 GHz (X-band) |
| Range | 0.125 to 96 NM |
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