What to do if Furuno FAR-28 Marine Radar buttons on trackball module operated but no response?
- DderrickmyersSep 10, 2025
If the buttons on the trackball module are operated but there is no response, replace the trackball module.

What to do if Furuno FAR-28 Marine Radar buttons on trackball module operated but no response?
If the buttons on the trackball module are operated but there is no response, replace the trackball module.
What to do if Furuno FAR-28 Marine Radar cannot operate radar from on-screen boxes?
If you cannot operate the radar from the on-screen boxes, replace the SPU Board.
What to do if Furuno FAR-28 Marine Radar brilliance adjusted but no picture?
If the brilliance is adjusted but there is no picture, replace the SPU board.
What to do if Furuno FAR-28 Marine Radar power is on but nothing appears on monitor?
If the power is on but nothing appears on the monitor, the brilliance may be too low. For keyboard-type control units, turn the BRILL control clockwise to increase the brilliance. If you have a trackball-type control unit, press any one of the F1-F4 keys for five seconds to increase the brilliance to '50'.
What to do if Furuno FAR-28 Marine Radar picture not updated or picture freeze-up?
If the picture is not updated or is frozen: 1. Check the connection of signal cables. 2. Replace the SPU board. 3. Turn the radar off and on.
What to do if Furuno FAR-28 Marine Radar power turned on but radar does not operate at all?
If the power is turned on but the radar does not operate at all: 1. Replace the blown fuse. 2. Correct the wiring and input voltage. 3. Replace the power supply board.
What to do if Furuno Marine Radar marks, indications and noise appear but no echo (Transmission leak representing own ship position is absent)?
If marks, indications, and noise appear but there is no echo, and the transmission leak representing own ship position is absent: 1. Reset the power to restore normal operation if the TX high voltage protection circuit has activated. 2. Check the magnetron current and replace the magnetron if necessary. 3. Replace the modulator board. 4. Replace the SPU board.
What to do if Furuno FAR-28 Marine Radar antenna not rotating?
If the antenna is not rotating: 1. Replace the antenna drive mechanism. 2. Press the relay reset button.
What to do if Furuno Marine Radar true motion presentation not working correctly?
If the true motion presentation is not working correctly: 1. If you have a full keyboard, try pressing the MODE key a little harder. 2. Press the MODE key or operate the PRESENTATION MODE box until TM appears. 3. Enter the correct own ship speed. 4. Ensure that the speed and compass inputs are accurate.
Why Furuno Marine Radar tuning adjusted but poor sensitivity?
If the tuning is adjusted but the Furuno Marine Radar has poor sensitivity: * Turn off the 2nd trace echo rejector. * Clean the radiator face.
| Range Scales | 0.125 to 96 nautical miles |
|---|---|
| Range | 96 nautical miles |
| Transmitter Output Power | 25 kW |
| Power Output | 25 kW |
| Power Supply | 24 V DC |
| IMO Compliance | Yes |
| Rotation Speed | 24 or 48 rpm |
| Antenna Type | Slot array |
| Antenna Length | 6 ft (1.8 m), 8 ft (2.4 m), 12 ft (3.6 m) |
General warnings, copyright, and manual usage guidelines.
Identifies situations that could cause death or serious injury if not avoided.
Highlights potentially hazardous situations that could result in death or serious injury.
Step-by-step guide to powering on the radar system and understanding the warm-up process.
Details the functions and types of control units available for operating the radar.
Guide on using the gain control to adjust receiver sensitivity for optimal radar picture clarity.
Important warnings and cautions regarding the reliance on and use of the Target Tracking system.
Details how to enable and configure automatic acquisition of radar targets.
Describes the collision alarm function, its settings, and how it helps prevent collisions.
Outlines essential regular checks and maintenance tasks for optimal radar performance.
Provides common troubleshooting procedures for restoring normal radar operation.
Guides qualified personnel on diagnosing and resolving complex hardware and software issues.
Details the types, beam width, sidelobe attenuation, and polarization of antenna units.
Lists specifications for the display units, including screen size, resolution, and effective radar diameter.
Details the power supply requirements and ratings for various radar components.