Furuno FR-1710 manual Advanced-level troubleshooting con’t

Page 61

Table 3-7 Advanced-level troubleshooting (con’t)

Problem

Check point and

Remedy

 

probable cause

 

 

 

 

 

 

Interference rejector

1. SPU Board

1.

Replace SPU Board.

inoperable (interference

2. Mother Board

2. Replace Mother Board.

rejection level not displayed)

 

 

 

 

 

 

 

Echo stretch ineffective

1. SPU Board

1.

Replace SPU Board.

(Neither "ES1" nor "ES2" is

 

 

 

displayed.)

 

 

 

 

 

 

 

Only 2 parallel index lines

1. Incorrect setting of index

1.

Set index line interval referring to

(6 lines wanted)

line interval

 

paragraph 1.27.

 

 

 

 

Range rings are not

1. Adjust the brilliance of

1.

Replace associated circuit board if

displayed.

range rings with the

 

unsuccessful.

 

intensity is increased.

 

 

 

2. SPU Board

2. Replace SPU Board.

 

 

 

 

Poor discrimination at range

1. Sea clutter control not

1.

Improper setting of A/C SEA

 

functioning properly.

 

control. If A/C SEA is seen only

 

 

 

at very close range, suspect

 

 

 

inaccurate frequency of

 

 

 

crystal oscillator.

 

 

 

 

True motion presentation not

1. Poor contact of MODE

1.

Try to press MODE key a little

working correctly.

key.

 

harder.

 

2. Selection is not accessed.

2. Press MODE key until "TM"

 

 

 

appears.

 

3. Speed entry is incorrect.

3. Enter correct own ship speed

 

 

 

referring to paragraph 1.12.

 

4. TM display inaccurate

4. Make sure that speed and compass

 

 

 

inputs are accurate.

 

 

 

 

Target not tracked correctly

1. Poor definition of targets in

1.

Adjust A/C SEA and A/C RAIN

 

sea clutter

 

controls referring to paragraphs

 

 

 

1.14 and 1.15.

 

 

 

 

3-6

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Page 60 Page 62
Contents Marine Radar First Edition NOV Keep heater away from equipment Do not operate the equipment with wet handsDo not disassemble or modify the equipment Do not open the equipmentUse the proper fuse Table of Contents Declaration of Conformity FR-1760DS SP-1Introduction FeaturesWord to the Owner of This Furuno Radar FR-1760DS System ConfigurationAntenna Unit Display Unit FR-1710/1725Viii Menu TreePlot Menu Mark Disp OFF Erase VEC REF REL True VEC Time Curs RNG INT REJ OFF Stretch Enhance Contrast Auto Xii Operational Overview Turning on the PowerTransmitter on Control description Control DescriptionCRT Brilliance Tuning the ReceiverControl Panel Backlighting Initializing the Compass Readout Degaussing the ScreenOn-screen legends and markers On-screen Legends and MarkersPresentation Modes Selecting presentation modeCourse-up Mode Screen shows Selecting the Range ScaleAutomatic speed input Entering Own Ship’s SpeedManual speed input 10 Echo stretch Pulselength, Echo StretchS1P Manual adjustment by the A/C SEA control Adjusting the SensitivityAutomatic adjustment by the A/C Auto control Suppressing Sea ClutterInterference Rejector Suppressing Precipitation ClutterMeasuring Bearing Measuring the RangeMeasuring range by the fixed range rings Measuring range by the variable range marker VRMMeasuring Range and Bearing Between Two Targets Collision Assessment by the Offset EBL18 Measuring range and bearing Between two targets Setting a Target Alarm ZoneDeactivating target alarm zone Acknowledging alarmInward and outward alarms Off-centering shift23 Echo SIG menu Echo AveragingPlotting a target Electronic Plotting Aid EPATarget data True or relative vector, vector timeTerminating target plotting Reading the target dataSilencing CPA/TCPA audible alarm Setting CPA/TCPA alarm rangesLost target alarm CPA/TCPA AlarmPast plot points Target Trails Echo TrailsTrue or relative trails Selecting trail time Trail gradationRestoring trails Displaying, erasing target trailsTrail brilliance Resetting target trailsThin trails Trail afterglowOrigin Mark Parallel Index LinesMarkers ZoomPresetting the function keys Presetting the user keysUser Keys F1, F2, F3 Function Keys42 FUNC1 menu Func key objectivesSuppressing Second-trace Echoes Adjusting Brilliance of Screen DataNoise Rejector Time AlarmEnhanced Video Navigation Data Degaussing IntervalClutter Sweep Video ContrastOutputting Target Position Selecting Range Scales Background ColorSelecting Bearing Scale Format Available color combinationsA/D curve settings 46 A/D Converter Curve SettingEnlarging Close-in Targets Alarms AlarmsPeformance Monitor Alarms con’tRadar Observation Radar resolutionGeneral Minimum and maximum rangesBearing accuracy False EchoesRange measurement Multiple echoesVirtual image Sart Search and Rescue TransponderShadow sectors Showing Sart marks on the radar display Sart range errorsGeneral remarks on receiving Sart Radar bandwidthRadar side lobes Racon Radar BeaconGain SEA controlPeriodic Maintenance Schedule MAINTENANCE, TroubleshootingMaintenance schedule On nextLife Expectancy of Major Parts Maintenance schedule con’tLife expectancy of major parts Replacement of Batteries Fuse Replacement Simple TroubleshootingBattery replacement information Easy troubleshootingServiceman qualification Advanced-level TroubleshootingService call Problem Check point Remedy Probable cause Advanced-level troubleshootingAdvanced-level troubleshooting con’t Sequence for diagnostic test Diagnostic TestTest results screen Display circuit test Left side view Parts LocationDisplay unit, top view Scanner unit, left side view FR-1760DS Scanner UnitScanner unit, right side view, RF section removed FR-1760DS Scanner Unit con’tFR-1760DS Power supply unit FR-1760DS Power Supply UnitRF module Upper part FR-1710/1725 Scanner UnitModule Lower part Specifications of Marine Radar Radar Display Dimension and Mass Coating Color Racon IndexIndex-2
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