Lowrance electronic HDS-5, HDS-7 manual No fish arches when Fish I.D. is turned off, 117

Troubleshooting

transducer cables away from other electrical wiring on the boat.

3.When trolling over weed beds in 20ft of water or less, you may experience vertical bars, loss of the chart picture, or the digital depth. First, do a soft reset of the unit. Then go to the Full Sonar Chart screen. Press Menu and select So- nar Features. Now turn the Chart Manual Mode to On. This will leave everything in Automatic Mode except depth. Now go back to the main menu and set the depth range for the depth you are in such as 0-20 feet.

4.It can sometimes be difficult for a high-powered unit to cap- ture the lightning-fast return in shallow water. Turn off the automatic sensitivity setting and manually reduce the sensi- tivity until the unit locks onto the bottom.

5.If two or more sonar units using the same frequency are op- erating at the same time, one or more of them may lose the depth reading due to the interference. It is like two radio sta- tions trying to both broadcast on 97.3FM. In shallow water, if the transducers are far enough apart, you may be able to operate them together. However, the deeper the water, the wider the beams spread out. When they cross each other, the interference occurs.

No fish arches when Fish I.D. is turned off

1.If you are using a transom-mounted transducer, the angle of the transducer may prevent a fish arch from displaying properly. If the arch slopes up but not down, then the front of the transducer is too high and needs to be lowered. If only the back half of the arch is shown, the nose of the trans- ducer is angled too low and needs to be raised. This is the most common problem if a partial arch is displayed.

2.The sensitivity may not be high enough. For the unit to dis- play a fish arch, it has to be able to receive the fish’s echo from the time it enters the cone until it leaves. If the sensitiv- ity is not high enough, the unit shows the fish only when it is in the center of the cone.

3.Use the Zoom feature. It is much easier to display fish arch- es when zoomed in on a small range of water than a large one. If your boat is in water deeper than 20ft, try setting the upper and lower limits to a 20ft depth section, such as 40ft

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