Humminbird 596c, 586c manual Finding the Cause of Noise, Wiring

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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 RP Ms while
	the boat is in n eutral and stat ionary to see if
	the n oise i ncreases pr oportionately; if noi se
	appears w hen you r ev the e			ngine, the
	problem could be the spark plugs, a lternator,
	or tachometer wiring. Replace the spark plugs
	with re sistor plugs, install a n alternator filter,
	or route th	e c ontrol he	ad	power a nd
	transducer	cables aw ay	from	the e ngine
	wiring.

Cavitation from the boat’s propeller

Turbulence created by the pr opeller can cause noise; m ake sure t he tr ansducer i s mo unted at least 15” (38 cm) from the propeller, and that the water flows smoothly over the face of the transducer at all times.

61	Troubleshooting

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Contents 586c and 596c OperationssManual Thank You Which your product was purchased Table of Contents Press Menu Main Menu Iii Setup Menu TabTable of Contents Page How Sonar Works Peak to Peak measures power output at the highest points DualBeam Sonar What’s On the Sonar Display High Sonar Intensity Return Bait Ball Understanding the Sonar Display Real Time Sonar RTS Window Bottom Presentation What’s On the Sonar Display Views Sonar views Sonar View Sonar Zoom View Sonar Zoom View Big Digits View Big Digits ViewUsing Your 500 Series Control Head POWER/LIGHT Key Key FunctionsView Key WAY Cursor Control Key Menu KeyExit Key 596c Title Screen Powering On the UnitMenu System Start-Up Options Menu Normal Exit Normal operation by powering your Fishfinder offSimulator System Status Accessory Test lists the accessories connected to the system Press Menu Press the Exit key to move quicklyto the top of the tab Main MenuQuick Tips for the Main Menu User Mode Normal or Advanced Sonar Tab, Normal Mode Sonar Tab, Advanced Mode Sonar Views only Sonar X-Press MenuHighlight Sensitivity on the Sonar X-Press Menu SensitivityAdvanced Sonar and Big Digits Views only Upper RangeHighlight Lower Range on the Sonar X-Press Menu Lower RangeZoom Level Chart SpeedAlarms Menu Tab Depth Alarm Fish ID AlarmHighlight Fish ID Alarm on the Alarms main menu Low Battery Alarm Temp. AlarmHighlight Temp. Alarm on the Alarms main menu Alarm Tone Sonar Menu Tab Fish ID+ uses a dvanced sig nal proc essing to Fish ID+Fish ID Sensitivity Real Time Sonar RTS WindowHighlight RTS Window on the Sonar main menu Bottom View Zoom WidthHighlight Bottom View on the Sonar main menu Depth Lines Surface Clutter Max Depth Noise FilterWater Type Setup Menu Tab Units Depth Highlight Units Distance on the Setup main menuUnits Temp Units DistanceUser Mode Units SpeedLanguage Triplog Reset Restore DefaultsUse this menu choice with caution Select Views Select Readouts Speed Temperature Triplog VoltageTo change Select Readouts Temp. Offset Depth OffsetTime Format Speed CalibrationDate Format Advanced see Main Menu User ModeFishfinder Doesn’t Power Up TroubleshootingProblem Possible Cause Display ProblemsFinding the Cause of Noise WiringHumminbird Fishfinder Accessories Depth Capability ft 330 m SpecificationsSonar Terms GlossaryBarometric Pressure, TripLog, etc Ital Readouts is aGlossary Glossary Glossary Receiver See Transmitter Glossary Glossary Glossary Glossary Monday Friday 800 a.m. to 430 p.m. Central Standard Time Contact Humminbird