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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 chirps.
Power. The Power button powers the 405SX up for normal operation. When the
unit is on, POWER turns the unit off. POWER can also be used to go directly into
Simulator mode. To enter simulator, with the unit powered off, press and hold
POWER for several seconds until a continuous chirp is heard.
Light. LIGHT controls the unit’s display backlight. With the unit powered on,
press LIGHT once to turn the backlight on “low.” Press LIGHT a second time to
turn the backlight on “medium,” a third time to turn the backlight on “high”,
and a fourth time to turn the backlight off. The backlight is very effective for low-
light and nighttime operation. When the backlight is on, the
405SX will consume
more power than with the backlight off. This is important when using the
405SX
in a portable configuration powered by a separate battery, or when powering the
unit from a trolling motor battery.
When powering the unit from a battery such as in portable
applications, you can prolong the battery life by using the
backlight at a minimum.
The three lower buttons, MENU, UP ARROW and DOWN ARROW work together
to control the
405SX menu-controlled user functions.
View. VIEW selects one of several screen configurations or
“views” possible depending on the transducer in use. When using
the standard transducer, without the optional speed/temp sensor
connected, the VIEW button toggles the display between the full-
screen 2D View and the Large Digital Readout View.
The 2D View is the default view, and the view which is first seen
at power-up. Pressing VIEW again will select the Large Digital
Readout View, which increases the size of key digital information
so that it can be viewed from a great distance. Normal 2D
information is displayed on the right side of the display. Pressing
VIEW again will toggle the display back to the 2D view.
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USING THE 405SX
CONTROL FUNCTIONS