Eagle Electronics 250 DF, 250 DS manual

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Weak bottom echo, digital readings erratic, or no fish signals:

1.Make certain the transducer is pointing straight down. Clean the face of the transducer. Oil, dirt and fuel can cause a film to form on the transducer, reducing its effectiveness. If the transducer is mounted in- side the hull, be sure it is shooting through only one layer of fiberglass and that it is securely bonded to the hull. Do NOT use RTV silicone rubber adhesive or Marine-Texepoxy.

2.Electrical noise from the boat's motor can interfere with the sonar. This causes the sonar to automatically increase its Discrimination or noise rejection feature. This can cause the unit to eliminate weaker signals such as fish or even structure from the display.

3.The water may be deeper than the sonar's ability to find the bottom. If the sonar can't find the bottom signal while it's in the automatic mode, the digital sonar display will flash continuously. It may change the range to limits far greater than the water you are in. If this happens, place the unit in the manual mode, then change the range to a realistic one, (for exam- ple, 0-100 feet) and increase the sensitivity. As you move into shallower water, a bottom signal should appear.

4.Check the battery voltage. If the voltage drops, the unit's transmitter power also drops, reducing its ability to find the bottom or targets.

Bottom echo disappears at high speeds or erratic digital read- ing or weak bottom echo while boat is moving

1.The transducer may be in turbulent water. It must be mounted in a smooth flow of water in order for the sonar to work at all boat speeds. Air bubbles in the water disrupt the sonar signals, interfering with its ability to find the bottom or other targets. The technical term for this is cavitation.

2.Electrical noise from the boat's motor can interfere with the sonar. This causes the sonar to automatically increase its Discrimination or noise rejection feature. This can cause the unit to eliminate weaker sig- nals such as fish or even structure from the display.

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Contents FishEasy 250 DS & SeaFinder 250 DF Copyright 2006 LEI-Eagle All rights reserved Table of Contents Troubleshooting Introduction GeneralBack-up memory SonarAutomatic ranging 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 BasicsMenus MemoryUP & 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 Fish Alarm AlarmsDepth Alarms Shallow Alarm Deep Alarm Battery AlarmNoise Rejection and ASP Noise Rejection menu Depth Display Temperature DisplayTo display Depth To display Temperature Voltage UnitsBacklight To display voltageContrast SimulatorSoftware Information Set LanguageTo select a language Reset Options Page Unit wont turn on Unit turns on only in simulator modeUnit 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