Furuno Ls4100 manual MAINTENANCE, Troubleshooting

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3.MAINTENANCE, TROUBLESHOOTING

WARNING

ELECTRICAL SHOCK HAZARD

Do not open the equipment.

Only qualified personnel should work inside the equipment.

3.1 Maintenance

Regular maintenance is essential for good performance. Checking the items listed in the table below monthly will help keep your equipment in good shape for years to come.

Checking

Item	Action

Transducer	Check cable for damage.
cable

Power cable,	Check that they are tightly
transducer	fastened. Refasten if
cable plug	necessary.

Display unit	Check for corrosion. Clean
ground	if necessary.
Power supply	Check voltage. If out of
voltage	rating correct problem.

3.3Transducer Maintenance

Marine life on the transducer face will result in a gradual decrease in sensitivity. Check the transducer face for cleanliness each time the boat is dry-docked. Carefully remove any marine life with a piece of wood or fine-grade sandpaper.

3.4 Replacing the Fuse

The fuse in the power cable protects the system from reverse polarity of the power supply and equipment fault. If the fuse blows, find the cause before replacing it. Use only a 1A fuse (FGMB 1A 125V, Code No. 000-114-805) or equivalent. Using the wrong fuse will damage the unit and void the warranty.

WARNING

Use the proper fuse.

Fuse rating is shown on the equipment. Use of a wrong fuse can result in fire and damage the equipment.

3.2Cleaning the Display Unit

Dust or dirt on the display unit can be removed with a soft cloth. If desired, a water-moistened cloth may be used.

Use special care when cleaning the LCD since it scratches easily. Do not use chemical cleaners to clean the display unit - they can remove paint and markings.

3.5 Battery Voltage Alert

A battery icon appears when the battery voltage is too high or too low.

	Battery icon and meaning

Icon	Meaning
	Voltage is lower than 10 VDC. If the
	voltage goes below 9 V, the equipment
	is automatically turned off.

	Voltage is higher than 16.5 VDC. If the
	voltage goes higher than 17.5 V, the
	equipment is automatically turned off.

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Contents Echo Soundr Table of Contents Safety Instructions Safety Instructions for the Installer Iii FeaturesForeword Word to LS-4100 OwnersStandard supply System configurationSystem Overview Equipment listsControl Description Power On/OffHow to remove the hard cover OperationChoosing a Display, Frequency Adjusting Display Contrast, BrillianceBrilliance/contrast adjustment window Mode selection window50 kHz Single frequency displayDual frequency display Marker-zoom displayBottom-zoom display Bottom-zoom displayBottom-lock display Nav data displaysChoosing automatic operation Menu Operating ProcedureAutomatic Operation How automatic operation worksGain offset Choosing the manual modeManual Operation Range offsetShifting the range Adjusting the gainPicture advance options window How to measure depth with the VRMMeasuring Depth Choosing Picture Advance SpeedClutter appearance Suppressing InterferenceSuppressing Low Level Noise Forms of interferenceScope display Erasing Weak EchoesScope Display Appearance of weak echoesAlarm menu AlarmsAlarm description Activating an alarmFish level options Depth, temperature, speed setting WindowWaypoints Silencing the buzzerWaypoint data display Registering a waypoint on the screenRegistering waypoint by L/L KHz displayWaypoint list Setting destination waypointEditing waypoints Erasing waypointsNav data display-1 Setting Up Nav Data DisplaysNAV Data Setup window Nav data window and item displayableOther Menu Items NAV data display-2HUE Picture Color Deep Gain How white line worksSystem menus Water temperature display wide, FSystem Menu System MenuNav window Page MAINTENANCE, Troubleshooting Installation menu TroubleshootingDiagnostics Troubleshooting tableTest patterns Memory ClearTest Pattern Clear memory displayInstallation Display UnitThru-hull Mount Transducer Suitable transducer mounting locations Thru-hull mount transducer dimensionsTypical thru-hull mount transducer installations Acceptable transducer mounting locations520-5PWD Installing the 520-5PWD on a flat hullTransom Mount Transducer Transducer preparationInstalling the transom mount transducer on a deep-V hull Installing the 525-5PWD525-5PWD Inside-hull Transducer Triducer 525ST-MSD Pre-test for speed and temperatureOptional Triducer Final preparationMounting location on single drive boat Installation of bracketMounting location Height required at mounting locationSensor position and transom angle AdjustingCable routing Vertical adjustment and cable routingAttaching the sensor to the bracket Attaching the sensor to the bracketOptional Water Temperature/Speed Sensor Power connector Establishing the groundOptional equipment Water temp/speed sensor IEC 61162-1 Data SentencesNmea PORT, Nmea MIX Installation MenuBottom level display Waas options windowSpecifications of Echo Sounder LS-4100 Page Page Display Unit 00014698000