Humminbird 595C Display Problems, Finding the Cause of Noise, Problem Possible Cause, Isolation

Page 39

FF595_Man_531385-1_A_PrfE.qxd 12/9/2004 2:41 PM Page 76

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 power at If the power output of your boat’s engine is unregulated,

high speeds.the control head may be protecting itself using its over- voltage protection feature. Make sure the input voltage does not exceed 20 Volts.

Finding the Cause of Noise

Electrical noise usually affects the display with many black dots at high speeds, and high sensitivity readings. One or more of the following sources can cause noise or interference:

Possible Source of Noise

Isolation

Other electronic devices

Turn off any nearby electronic devices to see if the

 

problem goes away, then turn them on one at a time to

 

see if the noise re-appears.

The boat’s engine

To determine whether the boat’s engine is the source of

 

the noise, increase the RPMs while the boat is in neutral

 

and stationary to see if the noise increases

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 boats engine may be interfering with sonar reception. See Finding the Cause of Noise for more information.

 

proportionately; if noise appears when you rev the

 

engine, the problem could be the spark plugs, alternator,

 

or tachometer wiring. Replace the spark plugs with

 

resistor plugs, install an alternator filter, or route the

 

control head power and transducer cables away from the

 

engine wiring.

Cavitation from the boat’s

Turbulence created by the propeller can cause noise;

propeller

make sure the transducer is mounted at least 15” (38 cm)

 

from the propeller, and that the water flows smoothly

 

over the face of the transducer at all times.

70

71

 

Page 38 Page 40
Image 39
Page 38 Page 40
Contents FishFinder 595c Operations Manual Thank You Table of ContentsSonar X-Press Menu Sonar Views Only Powering Up the Unit Menu System Start-Up Options MenuAlarms Menu Tab Setup Menu TabViews Menu Tab Troubleshooting How Sonar WorksSingle Beam Sonar Multi-Media Card MMC How GPS and Cartography WorkRTS Real Time Sonar Window Low Sonar Intensity Return KHz Fish SymbolWhat’s On the Sonar Display High Sonar Intensity Return Bait BallSonar views Sonar Zoom View Chart View Big Digits ViewViews Sonar ViewUnderstanding Sonar History Real Time Sonar RTS WindowBottom Presentation Sonar Zoom View Big Digits ViewBig Digits View Bird’s Eye View Chart ViewChart View with Active Cursor Bird’s Eye ViewCombo View View OrientationViewing Cartography Waypoints, Routes and Tracks Introduction to NavigationWaypoints, Routes and Tracks Save, Edit, or Delete a WaypointChart View with Target Add a Waypoint Target or Trolling GridNavigate to a Waypoint or Position Chart View with Grid Save, Edit or Delete a RouteSave or Clear a Current Track View Key POWER/LIGHT KeyEdit, Delete or Hide Saved Tracks Key FunctionsZoom +/- Key WAY Cursor Control KeyMark Key Goto KeyMenu System Powering Up the UnitMain Menu System Normal User Mode Sonar Tab, Normal Mode Sonar Tab, Advanced ModeSystem Status Start-Up Options MenuNormal Operation SimulatorSonar Views Only Position ErrorGPS Diagnostic View Sonar X-Press MenuUpper Range To adjust the SensitivityTo adjust the Upper Range SensitivityChart Speed Lower RangeBottom View Save Current Route Navigation X-Press MenuSave Current Track Clear Current TrackRemove Grid Cancel NavigationSkip Next Waypoint Remove TargetSonar Menu Tab Fish ID+To turn Fish ID+ on or off Fish Sensitivity Depth LinesAdvanced Water Type Surface ClutterNoise Filter Max DepthTracks Submenu contains the following menu choices Navigation Menu TabTracks WaypointsChart Detail Level RoutesMap Borders North Reference Lat/Lon GridSpot Soundings Shaded DepthClear Map Offset Map DatumSet Simulation Position Set Map OffsetLow Battery Alarm Alarms Menu TabDepth Alarm Fish ID AlarmDrift Alarm Temp AlarmOff Course Alarm Arrival AlarmSetup tab is selected Alarm ToneSetup Menu Tab To change the Alarm Tone settingUnits Temp User ModeUnits Depth Units SpeedAdvanced, Sonar View Only Triplog ResetRestore Defaults Select ReadoutsLocal Time Zone Depth OffsetTemp Offset Speed CalibrationSonar Time FormatDate Format Nmea OutputViews Menu Tab TroubleshootingFishFinder Doesn’t Power Up FishFinder Defaults to Simulator with a Transducer AttachedIsolation Display ProblemsProblem Possible Cause Finding the Cause of NoiseSpecifications Humminbird FishFinder AccessoriesContact Humminbird
Top Page Image Contents