User manual HUMMINBIRD 425SX

[. . . ] OPERATIONS MANUAL THANK YOU THANK YOU FOR CHOOSING YOUR 425SX FISHFINDER, MADE BY TECHSONIC INDUSTRIES, MANUFACTURER OF AMERICA'S #1 NAME IN FISHFINDERS, HUMMINBIRD. HUMMINBIRD HAS BUILT ITS REPUTATION BY DESIGNING AND MANUFACTURING TOP QUALITY, THOROUGHLY RELIABLE MARINE EQUIPMENT. YOUR HUMMINBIRD PRODUCT IS DESIGNED FOR TROUBLE-FREE USE IN EVEN THE HARSHEST MARINE ENVIRONMENT. IN THE UNLIKELY EVENT THAT YOUR HUMMINBIRD DOES REQUIRE REPAIRS, WE OFFER AN EXCLUSIVE SERVICE GUARANTEE. [. . . ] To adjust Sensitivity, press MENU repeatedly until the Sensitivity heading is displayed. When the Sensitivity menu appears, use the UP ARROW to increase the sensitivity, or the DOWN ARROW to reduce sensitivity. To sequence through the available settings, press and hold either ARROW button. After an adjustment is made, the menu disappears and the new sensitivity setting is in affect. If additional time is needed to study a menu, press and hold the MENU button and the menu will remain on-screen indefinitely. If you need to make an additional adjustment, press the UP ARROW or DOWN ARROW button. The Depth Range function controls the vertical distance displayed on the graphic area of the display. Ranges of 0­5, 0­10, 0­20, 0­40, 0­60, 0­80, 0­110, 0­150, and 0­185 metres and imperial ranges of 0­15', 0­30', 0­60', 0­120', 0­180', 0­240', 0­360', 0­480', and 0­600'. 16 USING THE 425SX MENU FUNCTIONS The range that positions the bottom depiction closest to the bottom of the screen, will best utilize the available display resolution. Using the factory setting of AUTO the 425SX can automatically adjust the depth range depending on the depth of the water. The unit tries to maintain the bottom depiction about ²/ down the total range (for example, in 6 m (20') of water, the 0-10m (0-30') range would be selected). This provides the best display resolution and therefore the best target separation possible. The manual setting enables you to adjust the current depth range setting. The unit no longer adjusts the Depth Range to the most appropriate range for bottom display. The digital depth readout always determines the depth of the bottom, even if it is not visible on-screen. Using manual Depth Range control, you can view sonar information from the area near the surface in greater detail. To return to automatic Depth Range control, press the MENU button until the Depth Range menu appears onscreen and use the UP ARROW to select AUTO. 6 Depth Range 17 USING THE 425SX MENU FUNCTIONS Zoom. The 425SX uses a greatly enhanced Zoom capability called "TruZoom" which offers expanded information on a select area of sonar information. Zoom is similar to Depth Range because it controls the range of information displayed on screen. Zoom, however, allows for selection of ranges beneath the surface so any area of water between the surface and the bottom can be enlarged to provide more detailed information. By using the full display to show a small area of coverage, the effective display resolution is increased, and the unit's ability to separate close targets is enhanced. In the 5m (15') depth range, TruZoom displays a range equal to one half the current depth range. In the 10m (30'), 20m (60'), 40m (120'), 60m (180'), 80m (240'), 110m (360'), 150m (480') and 185m (600') depth ranges, TruZoom displays a range equal to one fourth the current depth range. [. . . ] Also, in very deep water, it may be necessary to manually increase the sensitivity setting to maintain a graphic depiction of the bottom. 28 ADVANCED FEATURES TROUBLESHOOTING If you are using a transducer switch to connect two transducers to the 425SX, 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. [. . . ]