Why is the picture orientation incorrect on my Furuno FR-2105 Radar?
An incorrect picture orientation on the Furuno Radar could be due to the SPU board. The message HD SIG MISSING appears when the heading pulse is not received during standby. Alternatively, the gyro interface may need to be replaced.
Why are only 2 parallel index lines showing when 6 lines are wanted on Furuno FR-2105?
If only 2 parallel index lines are displayed when 6 lines are desired on the Furuno Radar, the index line intervals may be set incorrectly. Set the index line interval referring to section 1.26.
What does it mean if my Furuno Radar echo stretch is ineffective?
If the echo stretch is ineffective (neither ES1 nor ES2 is displayed) on the Furuno Radar, the SPU board may need to be replaced.
Why are data and marks not displayed in Transmit status on my Furuno FR-2105?
If data and marks are not displayed in Transmit status on the Furuno Radar, the SPU board may need to be replaced.
What to do if my Furuno FR-2105 Radar interference rejector is inoperable and the rejection level is not displayed?
If the interference rejector is inoperable and the rejection level is not displayed on the Furuno Radar, the key may have bad contact. Repair the contact of the key. If the issue persists, the SPU board may need to be replaced.
Why are range rings not displayed on my Furuno Radar?
If range rings are not displayed on the Furuno Radar, first adjust the brilliance of range rings at the BRILLIANCE 1 menu to see if intensity is increased. If this is unsuccessful, replace the associated circuit board. If the issue persists, the SPU board may need to be replaced.
What to do if my Furuno FR-2105 CRT brilliance is adjusted but there is no picture?
If adjusting the CRT brilliance does not produce a picture on the Furuno Radar, and you have a single display installation without a radar interswitching unit, ensure that RADAR 1 is selected on the RADAR 3 menu. Also, check the CRT high tension voltage supply with utmost care. If these steps do not resolve the issue, the SPU board may need to be replaced.
What to do if my Furuno Radar target is not tracked correctly?
If a target is not being tracked correctly on the Furuno Radar, adjust the A/C SEA and A/C RAIN controls, referring to section 1.13 and 1.14, to improve the definition of targets in sea clutter.
What causes poor discrimination in range on Furuno Radar?
Poor discrimination in range on the Furuno Radar may be due to the sea clutter control not functioning properly. This can be caused by an improper setting of the A/C SEA control. If A/C SEA is seen only at very close range, suspect an inaccurate frequency of the reference oscillator.
What causes poor sensitivity on Furuno FR-2105 Radar even when adjusting the TUNE control?
Poor sensitivity on the Furuno Radar, despite adjusting the TUNE control, can be caused by several factors. The magnetron may be deteriorated (check magnetron current and replace if below normal while transmitting on 48 nm range). The MIC might be detuned (check MIC detecting current and tune if below normal). Other causes include dirt on the radiator face (clean the surface), water ingress to the waveguide or feeder line (remove the water), or the second trace rejection being ON (disable it, referring to section 1.35).
Critical warnings about immediate hazards like antenna strikes and electrical shock.
Precautions regarding exposure to electromagnetic radio frequency energy from the radar antenna.
Instructions to prevent electrical shock, including not opening the equipment and handling wet conditions.
Advisories against placing liquid containers on the equipment and keeping heaters away.
Guidance on using the equipment for its intended purpose and not relying solely on navigation devices.
Welcome message and introduction to FURUNO's commitment to quality and reliability in marine electronics.
Highlights key technological advancements and capabilities of the FR-2105/2105-B radar series.
Details the international standards and regulations met by the radar and ARPA series.
Lists the specific models in the series, their frequency bands, output power, and transceiver configuration.
Explains the differences between R-type and IMO type radars, including range scales and echo colors.
Procedure for powering up the radar system, including warm-up time and standby indication.
Instructions on activating the transmitter from standby mode and quick start procedures.
Description of the control panel layout, including keys for BRILLIANCE, GAIN, CLUTTER, and menus.
Guidance on adjusting the overall screen brightness using the BRILLIANCE control.
Procedure for tuning the receiver automatically or manually for optimal performance.
Explanation of various legends, markers, and data displayed on the radar screen.
Information on the automatic and manual degaussing process to eliminate color contamination.
Procedure for aligning the on-screen gyro readout with the interfaced gyrocompass reading.
Description of available presentation modes (RM, Head-up, Course-up, North-up, True Motion).
Instructions on how to change the radar's display range scale using [+] and [-] keys.
Information on selecting appropriate pulselengths for different range scales and settings.
Guidance on using the GAIN control to optimize radar receiver sensitivity and echo visibility.
Instructions on using the A/C SEA control to mitigate sea clutter for better target detection.
Guidance on using the A/C RAIN control to reduce echoes from rain, snow, or clouds.
Explanation of how to activate the interference rejector to reduce mutual radar interference.
Instructions on using fixed range rings and variable range markers (VRMs) to measure target range.
Procedure for using electronic bearing lines (EBLs) to measure target bearing.
Method for assessing collision risk by measuring range and bearing between targets using EBL offset.
Steps to measure the range and bearing between any two targets using EBL and VRM.
Instructions on setting up target alarm zones (TAZ) for visual and audible alerts.
Procedure to displace the sweep origin to expand the view field without changing range scale.
Explanation of the echo stretch function for enhancing target video by enlarging echoes.
Description of the echo average feature for suppressing sea clutter through scan-to-scan correlation.
Guidance on using the EPA for electronic plotting, target tracking, and motion trend assessment.
Procedure for setting collision alarm ranges (CPA/TCPA) to alert for potential collision risks.
Instructions for entering own ship's speed automatically or manually for ARPA and stabilized modes.
Explanation of how to display and manage target trails for tracking target movement history.
Instructions on displaying and adjusting parallel index lines for maintaining constant distances.
Procedure for marking reference points, targets, or points of interest on the radar display.
Description of the zoom function (R-type only) for enlarging specific areas of the radar display.
Explanation of heading marker, north marker, stern marker, and own ship symbol displays.
Overview of the RADAR MENU, PLOT MENU, and NAV MENU keys for system configuration.
Detailed breakdown of settings available within the RADAR 1, 2, and 3 menus.
Explanation of how function keys can be assigned for quick access to specific radar settings.
Guidance on assigning function keys for optimal radar picture settings based on navigation scenarios.
Details on assigning specific radar functions (e.g., target trails, echo stretch) to function keys.
Information on setting up the watch alarm feature for safety and regular monitoring of the radar picture.
Menu structure for configuring the PICTURE/OPERATION settings for function keys.
Menu structure for configuring the OPERATION/WATCH ALARM settings for function key #4.
Instructions on how to display barge information on the radar display.
Explanation of radar map creation, storage, and display for navigation planning.
Procedure for creating and entering map data, including marks and lines, on the radar display.
Steps for saving created map data with a specific map number.
Instructions on how to display previously stored radar maps by entering the map number.
Procedure for erasing radar map data, either specific items or the entire map.
Guidance on activating the second-trace echo rejector to eliminate false echoes from distant targets.
Instructions for displaying waypoint and navigation line data from external navaids.
Steps to adjust the relative brilliance levels of various marks and alphanumeric readouts on the screen.
Instructions for displaying wind, ocean current, and depth sounding data on the radar screen.
Summary of potential alarms (gyro failure, target alarm, watch alarm) and how to quit them.
Overview of ARPA capabilities, acquisition, tracking, vector length, stabilization, and alarms.
Description of ARPA-specific keys on the plotting keypad and control head.
Step-by-step guide for operating the ARPA menus to set various parameters.
Instructions for entering own ship's speed (automatic, manual, target-based) for ARPA operation.
Explanation of automatic target acquisition capabilities, areas, and limitations.
Procedure for manually acquiring and tracking targets using the trackball and ACQ key.
How to change the size of plot symbols (STANDARD or LARGE) for ARPA targets.
Reference guide to ARPA symbols used for target acquisition, status, and alarms.
Steps to adjust the brilliance levels for various plot elements like vectors and symbols.
How to display detailed target data including range, bearing, CPA, and TCPA.
Explanation of vector modes (True/Relative) and stabilization (Sea/Ground) for target display.
Instructions on displaying and erasing past positions for tracked targets.
Procedure for manually entering set and drift corrections to improve vector accuracy.
Procedure for setting collision alarm ranges (CPA/TCPA) to alert for potential collision risks.
Instructions on activating and setting guard zones for target detection alarms.
Description of ARPA warnings for CPA/TCPA alarms, guard zone alarms, lost targets, and system failures.
Explanation of dynamic and static trial maneuvers for simulating own ship's future movements.
Procedure for executing the ARPA performance test to assess overall system functionality.
Guidelines for selecting and acquiring targets for tracking, including acquisition and quantization.
Discussion of how sea returns, rain, clouds, gain, and echoes affect ARPA performance.
Explanation of minimum and maximum radar ranges, factors affecting them, and relevant IMO requirements.
Description of common false echoes like multiple echoes, sidelobe echoes, and virtual images.
Information on detecting SART signals, including how they appear on the radar display.
Explanation of RACON signals and how they are displayed on the radar screen.
Overview of the Video Plotter RP-26, its memory cards, and chart display capabilities.
Description of the video plotter display elements and how to switch between chart and radar views.
Explanation of the available motion displays (RM, TM) and presentation modes (NU, CU, HU).
Instructions for hiding/showing graphics and navigation data on the video plotter display.
Information on setting track display conditions for own ship and other vessels.
Procedure for entering and managing marks and lines on the display, including line change features.
Instructions on entering, displaying, and deleting waypoints on the navigation system.
Procedure for entering, adding, removing, and displaying navigation lines.
Steps for formatting memory cards, recording, and replaying data on the video plotter.
Guide to configuring initial settings for the video plotter display elements.
Table showing longitude error correction based on latitude at a 96 nm range scale.
Explanation of plotter presentation modes, including default and user-settable colors and brilliance.
Schedule for periodic checks and maintenance of the radar system components.
Information on the expected life span of key components like antenna motors and magnetrons.
Guidance on replacing the battery that preserves data when the power is off.
User-level troubleshooting procedures for common operational problems without disassembling the unit.
Guidance for qualified service personnel on diagnosing and repairing hardware and software issues.
Procedure for executing a diagnostic test to check major circuit boards and controls in the display unit.
Visual representation of the menu hierarchy for accessing radar settings.
Diagrams illustrating the configuration flow for function keys.
Instructions for using the performance monitor (PM-30/PM-50) to check radar transmitter and receiver performance.
Description of the interswitching unit RJ-7 for coordinated operation of two radar systems.
Information on custom settings for fishing vessels, including the BIRD picture setup option.
Lists the input and output NMEA sentences supported by the radar system.
Diagram illustrating the serial signal input/output connections for the radar system.
Detailed explanation of various NMEA sentences used for data transmission (BWC, BWR, DBT, etc.).
List of electronic parts and their locations for the FR-2105 series display unit.
List of electronic parts and their locations for the FR-2135SW/2135SW-B scanner unit.
List of electronic parts and their locations for the FR-2125W/2125W-B scanner unit.
List of electronic parts and their locations for the FR-2155/2155-B scanner unit.
List of electronic parts for the FR-2135S/2135SW/2135S-B/2135SW-B power supply unit.
Diagrams showing the location of major components within the display unit.
Diagrams illustrating the location of components within the scanner unit for various models.
Diagrams showing the location of components within the transceiver unit for various models.
Simplified diagram showing the interconnection of radar components and external systems.
Formal declaration of product conformity to relevant standards for the FR-21X5 series.
Formal declaration of product conformity to relevant standards for the FR-2155 model.
Formal declaration of product conformity to relevant standards for the FR-2165DS model.
Critical warnings about immediate hazards like antenna strikes and electrical shock.
Precautions regarding exposure to electromagnetic radio frequency energy from the radar antenna.
Instructions to prevent electrical shock, including not opening the equipment and handling wet conditions.
Advisories against placing liquid containers on the equipment and keeping heaters away.
Guidance on using the equipment for its intended purpose and not relying solely on navigation devices.
Welcome message and introduction to FURUNO's commitment to quality and reliability in marine electronics.
Highlights key technological advancements and capabilities of the FR-2105/2105-B radar series.
Details the international standards and regulations met by the radar and ARPA series.
Lists the specific models in the series, their frequency bands, output power, and transceiver configuration.
Explains the differences between R-type and IMO type radars, including range scales and echo colors.
Procedure for powering up the radar system, including warm-up time and standby indication.
Instructions on activating the transmitter from standby mode and quick start procedures.
Description of the control panel layout, including keys for BRILLIANCE, GAIN, CLUTTER, and menus.
Guidance on adjusting the overall screen brightness using the BRILLIANCE control.
Procedure for tuning the receiver automatically or manually for optimal performance.
Explanation of various legends, markers, and data displayed on the radar screen.
Information on the automatic and manual degaussing process to eliminate color contamination.
Procedure for aligning the on-screen gyro readout with the interfaced gyrocompass reading.
Description of available presentation modes (RM, Head-up, Course-up, North-up, True Motion).
Instructions on how to change the radar's display range scale using [+] and [-] keys.
Information on selecting appropriate pulselengths for different range scales and settings.
Guidance on using the GAIN control to optimize radar receiver sensitivity and echo visibility.
Instructions on using the A/C SEA control to mitigate sea clutter for better target detection.
Guidance on using the A/C RAIN control to reduce echoes from rain, snow, or clouds.
Explanation of how to activate the interference rejector to reduce mutual radar interference.
Instructions on using fixed range rings and variable range markers (VRMs) to measure target range.
Procedure for using electronic bearing lines (EBLs) to measure target bearing.
Method for assessing collision risk by measuring range and bearing between targets using EBL offset.
Steps to measure the range and bearing between any two targets using EBL and VRM.
Instructions on setting up target alarm zones (TAZ) for visual and audible alerts.
Procedure to displace the sweep origin to expand the view field without changing range scale.
Explanation of the echo stretch function for enhancing target video by enlarging echoes.
Description of the echo average feature for suppressing sea clutter through scan-to-scan correlation.
Guidance on using the EPA for electronic plotting, target tracking, and motion trend assessment.
Procedure for setting collision alarm ranges (CPA/TCPA) to alert for potential collision risks.
Instructions for entering own ship's speed automatically or manually for ARPA and stabilized modes.
Explanation of how to display and manage target trails for tracking target movement history.
Instructions on displaying and adjusting parallel index lines for maintaining constant distances.
Procedure for marking reference points, targets, or points of interest on the radar display.
Description of the zoom function (R-type only) for enlarging specific areas of the radar display.
Explanation of heading marker, north marker, stern marker, and own ship symbol displays.
Overview of the RADAR MENU, PLOT MENU, and NAV MENU keys for system configuration.
Detailed breakdown of settings available within the RADAR 1, 2, and 3 menus.
Explanation of how function keys can be assigned for quick access to specific radar settings.
Guidance on assigning function keys for optimal radar picture settings based on navigation scenarios.
Details on assigning specific radar functions (e.g., target trails, echo stretch) to function keys.
Information on setting up the watch alarm feature for safety and regular monitoring of the radar picture.
Menu structure for configuring the PICTURE/OPERATION settings for function keys.
Menu structure for configuring the OPERATION/WATCH ALARM settings for function key #4.
Instructions on how to display barge information on the radar display.
Explanation of radar map creation, storage, and display for navigation planning.
Procedure for creating and entering map data, including marks and lines, on the radar display.
Steps for saving created map data with a specific map number.
Instructions on how to display previously stored radar maps by entering the map number.
Procedure for erasing radar map data, either specific items or the entire map.
Guidance on activating the second-trace echo rejector to eliminate false echoes from distant targets.
Instructions for displaying waypoint and navigation line data from external navaids.
Steps to adjust the relative brilliance levels of various marks and alphanumeric readouts on the screen.
Instructions for displaying wind, ocean current, and depth sounding data on the radar screen.
Summary of potential alarms (gyro failure, target alarm, watch alarm) and how to quit them.
Overview of ARPA capabilities, acquisition, tracking, vector length, stabilization, and alarms.
Description of ARPA-specific keys on the plotting keypad and control head.
Step-by-step guide for operating the ARPA menus to set various parameters.
Instructions for entering own ship's speed (automatic, manual, target-based) for ARPA operation.
Explanation of automatic target acquisition capabilities, areas, and limitations.
Procedure for manually acquiring and tracking targets using the trackball and ACQ key.
How to change the size of plot symbols (STANDARD or LARGE) for ARPA targets.
Reference guide to ARPA symbols used for target acquisition, status, and alarms.
Steps to adjust the brilliance levels for various plot elements like vectors and symbols.
How to display detailed target data including range, bearing, CPA, and TCPA.
Explanation of vector modes (True/Relative) and stabilization (Sea/Ground) for target display.
Instructions on displaying and erasing past positions for tracked targets.
Procedure for manually entering set and drift corrections to improve vector accuracy.
Procedure for setting collision alarm ranges (CPA/TCPA) to alert for potential collision risks.
Instructions on activating and setting guard zones for target detection alarms.
Description of ARPA warnings for CPA/TCPA alarms, guard zone alarms, lost targets, and system failures.
Explanation of dynamic and static trial maneuvers for simulating own ship's future movements.
Procedure for executing the ARPA performance test to assess overall system functionality.
Guidelines for selecting and acquiring targets for tracking, including acquisition and quantization.
Discussion of how sea returns, rain, clouds, gain, and echoes affect ARPA performance.
Explanation of minimum and maximum radar ranges, factors affecting them, and relevant IMO requirements.
Description of common false echoes like multiple echoes, sidelobe echoes, and virtual images.
Information on detecting SART signals, including how they appear on the radar display.
Explanation of RACON signals and how they are displayed on the radar screen.
Overview of the Video Plotter RP-26, its memory cards, and chart display capabilities.
Description of the video plotter display elements and how to switch between chart and radar views.
Explanation of the available motion displays (RM, TM) and presentation modes (NU, CU, HU).
Instructions for hiding/showing graphics and navigation data on the video plotter display.
Information on setting track display conditions for own ship and other vessels.
Procedure for entering and managing marks and lines on the display, including line change features.
Instructions on entering, displaying, and deleting waypoints on the navigation system.
Procedure for entering, adding, removing, and displaying navigation lines.
Steps for formatting memory cards, recording, and replaying data on the video plotter.
Guide to configuring initial settings for the video plotter display elements.
Table showing longitude error correction based on latitude at a 96 nm range scale.
Explanation of plotter presentation modes, including default and user-settable colors and brilliance.
Schedule for periodic checks and maintenance of the radar system components.
Information on the expected life span of key components like antenna motors and magnetrons.
Guidance on replacing the battery that preserves data when the power is off.
User-level troubleshooting procedures for common operational problems without disassembling the unit.
Guidance for qualified service personnel on diagnosing and repairing hardware and software issues.
Procedure for executing a diagnostic test to check major circuit boards and controls in the display unit.
Visual representation of the menu hierarchy for accessing radar settings.
Diagrams illustrating the configuration flow for function keys.
Instructions for using the performance monitor (PM-30/PM-50) to check radar transmitter and receiver performance.
Description of the interswitching unit RJ-7 for coordinated operation of two radar systems.
Information on custom settings for fishing vessels, including the BIRD picture setup option.
Lists the input and output NMEA sentences supported by the radar system.
Diagram illustrating the serial signal input/output connections for the radar system.
Detailed explanation of various NMEA sentences used for data transmission (BWC, BWR, DBT, etc.).
List of electronic parts and their locations for the FR-2105 series display unit.
List of electronic parts and their locations for the FR-2135SW/2135SW-B scanner unit.
List of electronic parts and their locations for the FR-2125W/2125W-B scanner unit.
List of electronic parts and their locations for the FR-2155/2155-B scanner unit.
List of electronic parts for the FR-2135S/2135SW/2135S-B/2135SW-B power supply unit.
Diagrams showing the location of major components within the display unit.
Diagrams illustrating the location of components within the scanner unit for various models.
Diagrams showing the location of components within the transceiver unit for various models.
Simplified diagram showing the interconnection of radar components and external systems.
Formal declaration of product conformity to relevant standards for the FR-21X5 series.
Formal declaration of product conformity to relevant standards for the FR-2155 model.
Formal declaration of product conformity to relevant standards for the FR-2165DS model.
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