Eagle Electronics 250 DF, 250 DS manual

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If no noise is present, turn the pump off, then turn on the VHF radio and transmit. Keep doing this until all electrical equipment has been turned on, their effect on the sonar display noted, then turned off.

If you find noise interference from an electrical instrument, trolling motor, pump, or radio, try to isolate the problem. You can usually reroute the sonar unit's power cable and transducer cable away from the wiring that is causing the interference. VHF radio antenna cables radiate noise when transmitting, so be certain to keep the sonar's wires away from it. You may need to route the sonar unit's power cable directly to the battery to isolate it from other wiring on the boat.

If no noise displays on the sonar unit from electrical equipment, then make certain everything except the sonar unit is turned off, then start the engine. Increase the RPM with the gearshift in neutral. If noise appears on the display, the problem could be one of three things; spark plugs, alternator, or tachometer wiring. Try using resistor spark plugs, alternator filters, or routing the sonar unit's power cable away from engine wiring. Again, routing the power cable directly to the battery helps eliminate noise problems. Make certain to use the in-line fuse supplied with the unit when wiring the power cable to the battery.

When no noise appears on the sonar unit after all of the above tests, then the noise source is probably cavitation. Many novices or persons with limited experience make hasty sonar installations which function perfectly in shallow water, or when the boat is at rest. In nearly all cases, the cause of the malfunction will be the location and/or angle of the transducer. The face of the transducer must be placed in a location that has a smooth flow of water at all boat speeds. Read your trans- ducer owner's manual for the best mounting position.

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Contents FishEasy 250 DS & SeaFinder 250 DF Copyright 2006 LEI-Eagle All rights reserved Table of Contents Troubleshooting Introduction GeneralAutomatic ranging Back-up memorySonar Zoom bottom trackHow Sonar Works Dual Search & Dual Frequency PreparationsPage Page Section Installation & Accessories Recommended Tools and SuppliesSelecting a Transducer Location How low should you go? Shoot-thru-hull vs. Transom Mounting Transom Transducer Assembly and Mounting Insert bolt and check transducer position on transom Assemble transducer and bracket Bottom Hull Flat-bottom hull Deep-vee hull Attach motor mounting bracket to transducer Transducer Orientation and Fish Arches Transducer angles and their effects on fish arches Shoot-Thru-Hull Preparation True bottom Second bottom Manual range setting Transducer location High speed Trolling speed Shoot-thru-hull Installation Power and Cable Connections Page In-Dash Installation Mounting The Sonar Unit In-Dash or BracketBracket Installation In-Dash Template173.9 137.9 72.9 23.4 157.9 Millimeter 56.9 Inch Portable Installation Portable Transducer Assembly Tie nylon Cord here Suction Portable transducer installed on boat transom Operation Keyboard BasicsMemory MenusUP & Down Arrows ↑ ↓ Display Full Chart FasTrack Depth Range Zoom Sensitivity To adjust sensitivity in Auto Mode To adjust sensitivity in Manual ModeGrayline Grayline scroll bar Chart Speed Frequency Fish I.D. Fish arches Fish I.D. symbols FishTrack Alarms Fish AlarmDepth Alarms Shallow Alarm Deep Alarm Battery AlarmNoise Rejection and ASP Noise Rejection menu Temperature Display Depth DisplayTo display Depth To display Temperature Backlight VoltageUnits To display voltageContrast SimulatorSet Language Software InformationTo select a language Reset Options Page Unit turns on only in simulator mode Unit wont turn onUnit freezes, locks up, or operates erratically Page No fish arches when the Fish I.D. feature is off NoisePage Page Page Eagle Electronics How to Obtain Service… Not toll-freeAccessory Ordering Information for all countries Visit our web site