Humminbird 405SX Operation Manual

29, 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 full…

14, CONTROL FUNCTIONS The 405SX uses a simple six button keypad for all user input. Press any button and an audible “chirp” confirms the control input. If a button has no function or is inappropriate for the situation, an audible “error” is heard. The unit sounds multiple chir…

25, Decreasing the value to a number less than zero shows fewer fish symbols on-screen. In this case smaller sonar returns are disregarded. This is useful for eliminating many small sonar returns when seeking larger species of fish. The 405SX remembers this selection even when the unit…

11, Humminbird 405SX This range is selected so the bottom representation is typically shown about ²⁄₃ down the display. Bottom. The graphic depiction of the bottom provides the user with an effective tool for understanding the composition of the bottom. The FSTN type display uses 4 discrete levels of gray t…

35, Part #531055-1 Rev. 11102E TOP Drill Drill ALIGN ONE CORNER WITH LOWER EDGE OF TRANSOM Use with XT Series Transducer for fiberglass hulls for aluminum hulls drill a set of two holes …

7, BEGINNING INSTALLATION Now that you have determined the transducer mounting method, you can begin installation of the 405SX. The fold out installation guide included provides detailed step by step instructions for installation of the control head and transducer. For transom mount transd…