Humminbird 383c Display Problems, Problem Possible Cause Control head loses, Power at high speeds

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Display Problems

There are several main conditions or sources of possible interference that may cause problems with the quality of the information displayed on the control head. Look in the following table for some symptoms of display problems and possible solutions:

Problem	Possible Cause
The control head loses	If the power output of your boat’s engine is
power at high speeds.	unregulated, the control head may be protecting
	itself using its over-voltage protection feature.
	Make sure the input voltage does not exceed 20
	Volts.

When the boat moves at higher speeds, the bottom disappears or suddenly weakens, or the display contains gaps.

There are no fish detected, even when you know they are in the water under the boat, or sonar readings seem weak or faulty.

The transducer position may need to be adjusted. A mix of air and water flowing around the transducer (cavitation) may be interfering with the interpretation of sonar data. See your Installation Guide for suggestions on adjusting the transducer position.

Electrical noise from the boat’s engine may be interfering with sonar reception. See Finding the Cause of Noise for more information.

Sonar readings may be affected if the transducer is not positioned correctly (i.e. mounted at an angle, not straight down), or there is some kind of mechanical interference, either because it is mounted inside a hull that is too thick for proper sonar transmission, the bond between the transducer and the hull is not airtight, or because the transducer is dirty. Check with your Installation Guide for guidance on re-positioning the transducer, and make sure the transducer is clean.

Low battery voltage may be affecting the power of signal transmission.

Electrical noise from the boat’s engine may be interfering with sonar reception. See Finding the Cause of Noise for more information.

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Contents 383c GPS Chartplotter Operations Manual Thank You Table of Contents Iii Sonar X-Press Menu Sonar views onlyTable of Contents Chart Menu Tab Specifications Glossary Contact Humminbird 106 How Sonar Works Peak to Peak measures power output at the highest points How GPS and Cartography Work DualBeam Plus SonarPage What’s On the Display RTS Real Time Sonar Window Low Sonar Intensity Return Sonar views ViewsSonar View Real Time Sonar RTS Window Understanding Sonar HistoryBottom Presentation Freeze FramePage Sonar Zoom View Sonar Zoom View200/83 kHz Split Sonar View Circular Flasher View Big Digits ViewBird’s Eye View Bird’s Eye ViewChart View without Active Cursor Chart ViewView Orientation Combo ViewCursor Viewing CartographyIntroduction to Navigation Waypoints, Routes and Tracks Waypoints, Routes and TracksSave, Edit, or Delete a Waypoint Navigate to a Waypoint or Position Add a Waypoint Target or Trolling Grid Navigation X-Press menuSave, Edit or Delete a Route Edit, Delete or Hide Saved Tracks Save or Clear a Current TrackInfo Key POWER/LIGHT KeyKey Functions View KeyWAY Cursor Control Key Menu KeyExit Key Mark KeyGoto Key Zoom +/- KeyMenu System Powering Up the UnitMain Menu System Normal User Mode Sonar Tab, Normal Mode Sonar Tab, Advanced Mode Normal Simulator System Status Start-Up Options MenuNormal Operation System Status SimulatorSelf Test Accessory TestGPS Diagnostic View GPS Diagnostic ViewSonar views only Sonar X-PressTMMenuHighlight Sensitivity on the Sonar X-PressTMmenu To adjust the SensitivitySensitivity Upper Range To adjust the Upper RangeHighlight Lower Range on the Sonar X-PressTMmenu To adjust the Lower RangeLower Range To adjust the Bottom Range Chart SpeedTo adjust the Chart Speed Highlight Chart Speed on the Sonar X-Press menuBottom Lock Cancel NavigationTo Cancel Navigation Highlight Cancel Navigation on the Sonar X-PressTM menuNavigation views only Navigation X-PressTMMenuWaypoint Submenu contains the following menu choices Waypoint NameTo view the Waypoint Name Submenu Highlight WaypointName on the Navigation X-PressTMmenuClear Current Track Cursor to WaypointSave Current Track To Skip Next Waypoint Save Current RouteSkip Next Waypoint To Save Current RouteTo Remove a Target Highlight Cancel Navigation on the Navigation X-PressTMmenuRemove Target To Set the Size of the Sonar Window in the Combo View Remove GridSonar Window To Remove a GridMost recently-created waypoint Sonar tab Press the Menu key twice to access the Main MenuSonar Menu Tab Highlight Beam Select on the Sonar main menu Beam SelectTo use Beam Select To turn Fish ID+ on or off Fish ID+TMHighlight Fish ID Sensitivity on the Sonar main menu To change the Fish ID Sensitivity settingTo change the RTS Window setting Fish ID SensitivityZoom Width To adjust the Bottom ViewTo change the Zoom Width Setting Bottom ViewTo set the 83 kHz Sensitivity KHz SensitivityDepth Lines To change the Depth Lines settingSurface Clutter To change the Surface Clutter settingMax Depth To change the Noise Filter settingTo change the Max Depth setting Noise FilterWater Type To change the Water Type settingNavigation tab Navigation Menu TabHighlight Current Track on the Navigation main menu Current TrackCurrent Track allows you to view the Current Track submenu To view the Current Track SubmenuHighlight Saved Tracks on the Navigation main menu Saved TracksSaved Tracks allows you to view the Saved Tracks submenu To view the Saved Tracks SubmenuWaypoints Submenu contains the following menu choices WaypointsTo view the Waypoints Submenu Highlight Waypoints on the Navigation main menuRoutes Submenu contains the following menu choices RoutesTo view the Routes Submenu Highlight Routes on the Navigation main menuGrid Rotation Chart OrientationNorth Reference Track Min Distance To change the Trackpoint Interval settingTo change the Track Minimum Distance setting Trackpoint IntervalDelete All Nav Data Map DatumCourse Projection Line Chart Menu Tab Map Borders Chart Detail LevelTo change the Chart Detail Level setting To change the Map Borders settingSet Simulation Position To change the Lat/Lon Grid settingHighlight Lat/Lon Grid on the Chart main menu Lat/Lon GridTo Clear Map Offset To change the Map Offset settingSet Map Offset Clear Map OffsetAlarms Menu Tab To change the Fish ID Alarm setting Depth AlarmFish ID Alarm To change the Depth Alarm settingTo change the Temp Alarm setting Low Battery AlarmTemp Alarm To change the Low Battery Alarm settingTo change the Arrival Alarm setting Off Course AlarmArrival Alarm To change the Off Course Alarm settingTo change the Alarm Tone setting Drift AlarmAlarm Tone To change the Drift Alarm settingSetup Menu Tab Units Distance Units DepthUnits Temp Language User ModeUnits Speed To Restore Defaults Triplog ResetRestore Defaults To Reset TriplogPosition Triplog Speed Voltage Course TemperatureSelect Readouts Time + DateTo Select Readouts To change the Depth Offset settingDepth Offset Speed Calibration To change the Temp Offset settingTo change the Speed Calibration setting Temp OffsetTo change the Local Time Zone To change the Daylight Saving Time settingLocal Time Zone Daylight Saving TimeTo change the Time Format To change the Position Format settingPosition Format Time FormatTo change the Date Format Date Format To turn Sonar on or off Nmea Output Sonar To turn Nmea Output on or offHighlight the View main menu tab Views Menu TabTo Change the View Status of Any View Series Defaults to Simulator with a Transducer Attached TroubleshootingVolts Display ProblemsProblem Possible Cause Control head loses Power at high speedsPropeller Finding the Cause of NoiseIsolation Boat’s engineSpecifications Sonar Terms GlossaryPage Page Page Page Receiver See Transmitter Page Page Page 100 GPS & Navigation Terms101 102 Course Over Ground103 104 105 106 107 108 109 110 111 Contact Humminbird