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Rachel JonesSep 23, 2025
Why is the key beep inaudible on my Furun FAR-2827 FAR-2127?
- KKaitlin PriceSep 23, 2025
The key beep may be turned off. Adjust the key beep level on the OPERATION menu.
Why is the key beep inaudible on my Furun FAR-2827 FAR-2127?
The key beep may be turned off. Adjust the key beep level on the OPERATION menu.
Why is my Furun FAR-2827 FAR-2127 Radar properly tuned but has poor sensitivity?
Several factors could be responsible: the magnetron may have deteriorated, the MIC may be detuned, there could be dirt on the radiator face, water may have entered the waveguide or feeder line, or the second trace echo rejection might be on. Try these solutions: check the magnetron current, and if it's below normal, replace the magnetron; check the MIC detecting current, and if it's below normal, tune the MIC; clean the radiator surface; remove water from the feeder line; disable the second-trace echo rejector.
What to do if my Furun Radar range is changed but the picture does not change?
This could be due to a defective range key or video freeze-up. First, try pressing the RANGE [+] and [-] keys (or the RANGE box) several times. If that doesn't work, try turning the power off and on again.
Why do marks, indications, and noise appear on my Furun FAR-2827 FAR-2127 Radar, but no echo?
The cause might be a blown fuse. Check the fuse in the processor unit to see if it has blown.
What to do if my Furun FAR-2827 FAR-2127 range changed but the radar picture is not changing?
This could be caused by a defective range key, an SPU board issue, or video freeze-up. You can try hitting the RANGE [+] and [-] keys several times. If that's unsuccessful, the keypad may need replacement. Alternatively, replace the SPU board or try turning the radar off and on again.
Why is my Furun FAR-2827 FAR-2127 Radar discrimination in range poor?
The sea clutter control may not be functioning properly due to an improper setting of A/C SEA. If A/C SEA is only seen at a very close range, suspect an inaccurate frequency of the reference oscillator.
Why is my Furun FAR-2827 FAR-2127 Radar antenna not rotating?
Possible causes are a problem with the antenna drive mechanism or a defective antenna drive motor relay. Try replacing the antenna drive mechanism or pressing the relay reset button.
Why are buttons on trackball module operated but no response on my Furun FAR-2827 FAR-2127 Radar?
The cause is a faulty trackball module. Replace the trackball module.
How to fix incorrect orientation of Furun Radar picture?
The issue may stem from the SPU board or the gyro interface. If the message HDG SIG MISSING appears, it means the heading pulse is not being received during standby. You may also need to replace the gyro interface.
Why is my Furun Radar true motion presentation not working correctly?
This could be due to poor contact of the MODE key (if you have a full keyboard), the selection not being accessed, an incorrect speed entry, or an inaccurate TM display. Try pressing the MODE key a little harder. Ensure TM is selected by pressing the MODE key or operating the PRESENTATION MODE box until TM appears. Enter the correct own ship speed. Also, ensure that speed and compass inputs are accurate.
Information about RF radiation hazard from radar antenna and distances for safe levels.
Precautions regarding electrical hazards, servicing, and power handling for the radar.
Emphasis on not relying solely on electronic aids and navigator's responsibility.
Details about warning labels attached to equipment and their importance.
Overview of key features of the radar series, including LCD size and model availability.
System configuration diagram for radars with FURUNO-supplied monitors.
System configuration diagram for blackbox type radar installations.
Details on antenna type, beam width, sidelobe attenuation, and rotation specifications.
Specifications for frequency, output power, pulselength, PRF, and IF.
Specifications for screen type, size, resolution, and effective radar diameter.
Information on interface standards and data types supported by the radar system.
Details on power requirements for display and processor units, and antenna units.
Procedure for powering the radar system on and off, including warm-up status.
How to turn the radar transmitter on after the magnetron has warmed up.
Description of the two types of control units available (RCU-014 and RCU-015).
Instructions on how to access and navigate the main menu using keyboard or trackball.
Important precautions and operational notes for the Automatic Radar Plotting (ARP) function.
Identification and function of keyboard and trackball controls used for ARP operation.
Procedure for enabling and disabling the Automatic Radar Plotting (ARP) function.
Methods for inputting own ship's speed data required for ARP operation.
Setting up automatic acquisition conditions for tracking multiple targets.
Steps for manually acquiring targets and setting manual acquisition conditions.
Explanation of ARP symbols used on the display and how to adjust their attributes.
How to display detailed information for tracked ARP targets, including range, bearing, and CPA/TCPA.
Displaying a comprehensive list of all tracked ARP and AIS targets with their data.
Configuring target vectors to display relative or true motion and setting vector length.
Displaying past positions of tracked targets as time-spaced dots.
Manually entering set and drift values to improve vector and target data accuracy.
Configuring CPA/TCPA alarm ranges to alert for potential collision situations.
Setting up guard zones for automatic target acquisition and collision warnings.
Explanation of various operational warnings and alarms associated with ARP functions.
Simulating own ship's maneuvers and their effect on tracked targets.
Running a test program to assess the overall performance of the ARP system.
Guidelines for selecting targets for tracking based on echo measurements and acquisition criteria.
Discussion of factors affecting ARP performance like sea returns and low gain.
Overview of keyboard and trackball controls used for operating the AIS system.
Procedure for turning the AIS function on or off within the radar system.
How to control the visibility of AIS targets and symbols on the radar display.
Entering voyage-related data such as navigation status, ETA, and destination for AIS.
Converting sleeping AIS targets to activated targets to display course and speed vectors.
Managing screen clutter by sleeping individual or all AIS targets.
Viewing basic AIS target data, including bearing, range, course, and speed.
Adjusting the brilliance, size, and color of AIS symbols on the radar display.
Displaying past positions of AIS targets as time-spaced dots.
Setting the Rate Of Turn (ROT) limit for target symbols to indicate vessel turning direction.
Combining ARP and AIS target data for a unified display, reducing target symbol duplication.
Viewing own ship's static data, including type, call sign, name, and GPS antenna positions.
Transmitting and receiving safety and routine messages via VHF link using the AIS.
How to view received AIS messages and alarms, and manage message storage.
Explanation of various AIS system messages and their meanings displayed on the radar.
Introduction to the video plotter functions: plotting tracks, entering waypoints, and recording data.
Selecting between Radar and Radar + Video Plotter display modes for integrated viewing.
Explanation of available presentation modes for video plotter display like North-up and Course-up.
Creating and using radar maps by defining navigation data, routes, and monitoring points.
Procedure for erasing individual or all radar map marks and lines from the display.
Correcting positional errors between radar screen and map marks/lines, and cursor data.
Overlaying charts on the radar image using optional chart cards and displaying charts.
Controlling the visibility of various graphics like grid, tracks, marks, and chart features.
Plotting and managing own ship's and other ships' tracks for navigation history.
Inscribing marks and lines on the display to denote important points like buoys or wrecks.
Procedure for erasing individual or all plotter marks and lines from the memory.
Entering, editing, and erasing waypoints, and managing waypoint lists for navigation.
Creating, editing, and erasing navigation lines, which can contain multiple waypoints.
Initializing memory cards and recording video plotter data for later analysis.
Replaying recorded video plotter data from memory cards for past data analysis.
Procedures for deleting files from memory cards, including individual files or all data.
Recommended schedule for regular checks and maintenance to ensure optimal performance.
Information on the expected lifespan of key components like antenna motors and magnetrons.
Guidance on replacing fuses to protect the equipment from overcurrent and faults.
Instructions for cleaning the trackball to resolve cursor skipping or abnormal movement issues.
Common troubleshooting procedures to restore normal operation for simple issues.
Guidance for qualified personnel to troubleshoot hardware and software issues at a component level.
Instructions for executing diagnostic tests on major circuit boards for fault checking.
List and explanation of error messages that may appear on the display screen.
Diagram illustrating the main menu structure and navigation paths for radar functions.
Details on input and output sentences for serial interfaces, including data reception and formats.
List of electrical parts and their locations within the processor, control, and display units.
Table showing longitude error variations based on latitude at a 96 nm range scale.
General