Furuno FR-8051 manual Problem Check point and probable Remedy Cause

Page 53

Problem

Check point and probable

Remedy

 

cause

 

 

 

 

 

 

Interference rejector

1. SPU Board

1.

Replace SPU Board.

inoperable

 

 

 

 

(interference rejection

 

 

 

 

level not displayed)

 

 

 

 

 

 

 

 

Echo Stretch

1. SPU Board

1.

Replace SPU Board.

ineffective (Neither

 

 

 

 

"ES1" nor "ES2" is

 

 

 

 

displayed.)

 

 

 

 

 

 

 

 

 

Only 2 parallel index

1.

Incorrect setting of index line

1.

Set index line interval referring to

lines (6 lines wanted)

 

interval

 

paragraph 1.18.

 

 

 

 

 

Range rings are not

1.

Press RINGS (PUSH)

1.

Replace associated circuit board if

displayed.

 

control to see if intensity is

 

unsuccessful.

 

 

increased.

2.

Replace control.

 

2.

Bad contact of control

3.

Replace SPU Board.

 

3.

SPU Board

 

 

 

 

 

 

Key beep inaudible

1. SPU Board

1.

Replace SPU Board.

 

 

 

 

 

Poor discrimination at

1.

Sea clutter control not

1.

Improper setting of A/C SEA effect

range

 

functioning properly.

 

is seen only at very close range.

 

 

 

 

Suspect inaccurate frequency of

 

 

 

 

crystal oscillator.

 

 

 

 

 

True Motion

1.

Poor contact of MODE key.

1.

Try to press MODE key a little

presentation not

2.

Selection is not accessed.

 

harder.

working correctly

3.

Speed entry is incorrect.

2.

Press MODE key until "TM"

 

4.

TM display inaccurate

 

appears.

 

 

 

3.

Enter correct own ship speed

 

 

 

 

referring to paragraph 1.23.

 

 

 

4.

Make sure that speed and compass

 

 

 

 

inputs are accurate.

 

 

 

 

Target not tracked

1. Poor definition of targets in

1.

Adjust A/C SEA and A/C RAIN

correctly

 

sea clutter

 

controls referring to paragraphs

 

 

 

 

1.11 and 1.12.

 

 

 

 

 

4 – 4

Page 52 Page 54
Image 53
Page 52 Page 54
Contents Marine Radar First Edition NOV Safety Information Do not diassemble or modify the equipment Iii Radio Frequency Radation HazardUse the correct fuse Table of Contents Maintenance Vii Features Word to FR-8051/8111/8251 OwnersForeword Configuration of FR-8051/8111/8251 Transceiver Module SpecificationsAntenna Unit Display Unit Power Supply and Power ConsumptionEnvironmental Conditions OthersStandard Set Equipment ListsXii Name Type Qty RemarksSpare Parts Optional EquipmentXiii Name Type Code No RemarksFunction Type Categorization by SpecificationXiv Control Description Operation25 NM Display IndicationsDisplay indications lower part Transmitting, Stand-by Turning the Radar On/OffSelecting Range Presentation mode Description Representative display Presentation ModeSelecting presentation mode Description Presentation modeChanging pages on the Initial menu Menu OverviewBasic menu operation MK Erase erase all fixed marks Menu treeInitial Tune SET AUTO, Manu SPD Mode MAN, LOG, NAV Adjusting Sensitivity Tuning the ReceiverAdjusting Picture Brilliance Selecting tuning modeAdjusting Range Ring Brilliance Adjusting Brilliance of Control Panel and MarkersSuppressing Sea Clutter Automatic anti-clutter controlHeading and North Markers Suppressing Rain ClutterMeasuring the Range Measuring range by the range ringsMeasuring Bearing Collision Assessment by Measuring Range Offset EBL Canceling the cursor offsetOff-centering the Picture Index LinesFunction key ZoomInscribing Marks on the Display Automatic speed input Own Ship SpeedTurning on a function Interference Rejector Ship’s GraphicEcho Trails Manual speed inputStarting echo trail Canceling echo trailTrail time Trail referencePlotting a target Electronic Plotting E-plotTrail brilliance Target data Canceling target plottingTrue or relative vector Vector timeSetting a guard zone Setting a Guard Alarm ZoneSelecting guard zone type Activating the guard zonesSilencing the aural alarm Watch AlarmCanceling the guard zone and guard alarm How to turn on echo averaging26 Echo average Suppressing Second-Trace EchoesEcho Stretch Presetting pulselengthNoise Rejection Selecting PulselengthSelecting pulselength set to use Waypoint DisplayOutputting Cursor Position TLL data Sector Blanking Alarm Output Signal On/OffSelecting Unit of Range Measurement, Bearing Reference Radar Picture, Target Properties and Radar Pulse Range ResolutionRadar Observation False Echoes Bearing ResolutionIndirect echoes Multiple echoesSide-lobe echoes Minimum and Maximum RangesMinimum range Blind and shadow sectorsLocating a Ship or Survival Craft in Distress by Sart Gain When Working on the Antenna Unit MaintenancePart Type Life expectancy Remarks Interval Check point Check and measures RemarksProblem Remedy TroubleshootingSimple Troubleshooting Problem Check point and probable Remedy Cause Advanced-level TroubleshootingServiceman qualification Problem Check point and probable Remedy Cause Problem Check point and probable Remedy Cause Diagnostic test, test pattern Diagnostic TestAntenna Unit Location of PartsModulator Trigger RF Transceiver UnitRF transceiver unit FR-8051/8111 Display unit, top view Display Unit common to all modelsDisplay unit, right side view Operating a performance monitor Performance MonitorTransmitter Receiver Performance Display Meaning Transmitter normal Receiver normalFluxgate Heading Sensor C-2000 Auto Plotter ARP-15Video Plotter RP-15 Page
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