Troubleshooting

Repairs

Do not attempt to repair the LEGEND 3000 SERIES yourself. There are no user-serviceable parts inside, and special tools and techniques are required for reassembly to ensure the waterproof integrity of the housing. Repairs should be performed only by authorized Techsonic technicians.

Before You Call Customer Support

Many requests for repair received by Techsonic involve units that do not actually need repair. These units are returned “no problem found.” If you have a problem with your LEGEND 3000 SERIES, use the following troubleshooting guide before calling Customer Support or sending your unit in for repair. The LEGEND 3000 SERIES contains several tools that can aid in determining if there is a problem, as well as how to isolate and repair a problem in many cases.

1. Nothing happens when I turn the unit on.

Check the power cable connection at both ends. Be sure the cable is connected correctly to a reliable power source—red lead to positive, black lead to negative or ground. Ensure the power available at the mount is between 10 and 20 VDC. If the unit is wired through a fuse panel, ensure the panel is powered; accessory fuse panels often are controlled by a separate switch or by the boat’s ignition switch. A fuse also can appear to be good when in fact it is not. Check the fuse with a tester or replace it with a fuse known to be good.

Check the power connection to the LEGEND 3000 SERIES. It is possible to force the power cable connector into the collector plug incorrectly. If the connector is reversed, the unit will not work. Examine the contacts on the back of the unit to ensure there is no corrosion.

Ensure the cables are properly installed into the collector plug and the collector plug is properly seated into the LEGEND 3000 SERIES.

2. The unit starts up in Simulator mode.

The LEGEND 3000 SERIES has the ability to detect that a transducer is connected. If, at power up, a transducer is not connected, the unit starts up in SIMULATOR mode.

Ensure that an appropriate transducer connector is used and the connector is positioned correctly in the collector plug. Also, be sure that the collector plug is fully-seated into the unit. Next, inspect the transducer cable from end to end for breaks, kinks, or cuts in the outer casing of the cable, and repair after

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TROUBLESHOOTING

disconnecting the cable from both the unit and the transducer. Also, make sure that the transducer is fully submerged in water. If the transducer is connected to the unit through a switch, temporarily connect it directly to the unit and try again. If none of these items identifies an obvious problem, the transducer itself may be at fault. Be sure to include the transducer if returning the unit for repair.

To override the SIMULATOR manually, select the SIMULATOR CONTROL PANEL and turn to OFF. See Control Panels for more information.

3. There is no bottom reading visible on the display.

There are several possible causes for this condition. If the loss of bottom information occurs only at high boat speeds, the transducer needs to be adjusted. If the digital depth readout is working but there is no bottom visible on-screen, it is possible that the depth range has been adjusted manually to a range lower than that needed to display the bottom. Also, in very deep water, it may be necessary to increase the GAIN setting manually in order to maintain a graphic depiction of the bottom.

If you are using a transducer switch to connect two transducers to the LEGEND 3000 SERIES, make sure that the switch is in the correct position to connect a transducer, and that the transducer is submerged in water. (If a trolling motor transducer is selected and the trolling motor is out of the water, no sonar information will appear.)

If none of the above solves the problem, inspect the transducer cable from end to end for breaks, kinks, or cuts in the outer casing of the cable, and repair after disconnecting the cable from both the unit and the transducer. If the transducer is connected to the unit through a switch, temporarily connect it directly to the unit and try again. If none of these items identifies an obvious problem, the transducer itself may be at fault. Be sure to include the transducer if returning the unit for repair.

4.When in very shallow water, I get gaps in the bottom reading and inconsistent digital depth indications.

The LEGEND 3000 SERIES will work reliably in water 2' (.6m) or deeper. Remember that the depth is measured from the transducer, not necessarily from the surface of the water.