Humminbird 405SX manual There is no transducer detected

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MAINTENANCE

MAINTENANCE/TROUBLESHOOTING

2. There is no transducer detected.

The 405SX has the ability to detect and identify that a transducer is connected. First, ensure that an appropriate transducer connector is positioned correctly in the connector holder, and that the unit is fully seated on the mount.

Second, inspect the transducer cable from end to end for breaks, kinks, or cuts in the outer casing of the cable. Also ensure 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 is probably the problem. Be sure to include the transducer if returning the unit for repair.

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

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

If you are using a transducer switch to connect two transducers to the 405SX, ensure the switch is in the correct position to connect a transducer that is in water. (If a trolling motor transducer is selected and the trolling motor is out of water, no sonar information appears.)

If none of the above solve the problem, inspect the transducer cable from end to end for breaks, kinks, or cuts in the outer casing of the cable. 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 the problem. 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 indication.

The 405SX will work reliably in water 2' or deeper. The depth is measured from the transducer, not necessarily from the surface.

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Contents Operations Manual 405SXSINGLEBEAMfishfinderThank YOU Table of Contents Accessories Installation PreparationInstallation Overview Parts SuppliedDetermining How to Mount Transducer Installation OverviewAlternate Transducers and Mounting Methods Alternate Transducers and Mounting MethodsPortable Mounting Trolling Motor MountingBeginning Installation Beginning InstallationHOW Sonar Works Using the 405SXHOW Sonar Works Simulator OperationWhat You See On-Screen Feature MemorySimulator Operation What YOU see ON-SCREEN Screen as regular clusters of ind To best represent those conditions on-screenWater interferes with Sonar What YOU see on Screen Instance, a small school Fish ID. The 405SX usesControl Functions Control Functions2D View Large Digit View Chart View Menu Functions Sensitivity. The Sensitivity function controls Menu FunctionsDepth Range Using the 405SX Lower Zoom Limit Bottom return. The left Side of the screen is aUsing the 405SX Triplog Using the 405SX Blacken in the display below the bottom. This gives Speed offset is remembered after power is disconnected Using the Diagnostic Feature Using DiagnosticMaintenance MaintenanceNothing happens when I turn the unit on MAINTENANCE/TROUBLESHOOTINGTroubleshooting There is no bottom reading visible on the display There is no transducer detectedUnit comes on before I press POWER, and won’t turn off TroubleshootingMy unit loses power at high speeds Get gaps in the reading at high speedsWARRANTY/SERVICE Policy MAINTENANCE/WARRANTYHumminbird ONE Year Full Warranty Service PolicyFurther information on Humminbird products can be found at Customer SupportCustomer Support Specifications Page TOP
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