Furuno FE-700 manual Troubleshooting, Symptom Probable Causes Remedy

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6.5 Troubleshooting

The table below provides simple troubleshooting procedures which you may follow to restore normal operation. If you cannot restore normal operation, contact your dealer.

SYMPTOM

PROBABLE CAUSES

REMEDY

No picture; no reading

Low power supply

Check the supply voltage.

measure

Fuse blown

Replace the fuse.

 

 

Power cable damaged

Check the cable and repair.

No echo sounding picture

Transducer cable damaged

Repair the cable.

 

Transducer cable connection

Tighten the connections.

 

loosened

 

 

Transmitter not working

Make sure the maximum output power is

 

 

selected. (See section 3.2 System Menu 1.)

Irregular display

Low sensitivity

Increase the Gain by turning the GAIN control

 

 

clockwise.

 

Low reflectivity from seabed

Suspect muddy seabed.

 

Marine life on transducer

Remove marine life from the transducer when

 

 

dry docked.

Loss of seabed display

Out of range

Check the range scale setting.

 

Air bubbles caused by going

This is normal, it is not a sign of equipment

 

astern or running over other

trouble.

 

ship wakes

 

Heavy noise

Wrong installation place of

Find cause of noise. Relocate the transducer if

 

transducer

noise persists.

 

Other echo sounders nearby

If more than one echo sounder is working on

 

 

the ship, there is no ideal measure to cure the

 

 

problem.

Surface noise

Aeration in near surface area

Not an equipment problem.

 

Rough weather

Not an equipment problem.

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Contents Navigational Echo Sounder Pub. No. OME-23660 Yosh FE-700 DECSafety Instructions Record of Modifications in this OPERATOR’S Manual MENU3Contents Features ForewordWord to FE-700 Owners System Configuration Display UnitSpecifications of Navigational Echo Sounder E2366S01QIPX5 GLL L/LGGA L/L Power Supply Operation Control DescriptionIndications, Markers ROM OK Dram OK Sram OK Battery OK Turning On/Off Tone and BrilliancePanel Dimmer DBS mode Display ModeNAV mode History modeLogbook mode OS Data modeMenu display Help displayGain Control How to enable/disable automatic operationRange Scale Automatic OperationAcknowledging the alarm Shallow Depth AlarmActivating/deactivating the alarm DraftSuppressing Low Level Noise Menu OperationMenu Overview Suppressing InterferencePicture Advance TrendInterval System Menu System MenuOutput Input System Menu Demonstration Display Echo Quality SettingTransducer Setting DEMONSTRATION. DemonstrationBottom Level TVG LevelEcho Offset Adjusting Contrast Operation of Digital Depth Indicator FE-720 OptionAdjusting panel dimmer Basic OperationSelecting language Menu OperationDimmer control Selecting the unit of depth measurementDiagnosis Factory SettingAlarm OFFCleaning the Display Unit MAINTENANCE, TroubleshootingTransducer Maintenance Replacing the Fuse, BatteryTroubleshooting Symptom Probable Causes RemedyBlack Diagnostic TestTest Pattern WhiteDON’T Turn Power OFF Until Completed Memory Clear Clearing the MemoryExtension Mode Menu TreeRMA, RMC, GLL, GGA, VTG, ZDA Digital Interface IEC 61162-1 EditionO Sentences DBT, DPT, DBS NmeaSchematic Diagrams NAV in port listenerDBS Depth below surface Sentence DescriptionDPT Depth DBT Depth below transducerGLL Geographic position latitude/longitude GGA Global positioning system GPS fix data RMA Recommended minimum specific LORAN-C data RMC Recommended specific GPS/TRANSIT data VTG- Course over ground and ground speed ZDA Time and dateParts LOCATION, Parts List Furuno Code No
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