handling and/or opening this unit may result in exposure to lead, in the form of solder. Dis-assembly and repair of this electronic unit should only be performed by authorized service personel. Any modification of the serial number or attempt to repair the original equipment or accessories by unauthorized individuals will void the warranty. handling and/or opening this unit may result in exposure to lead, in the form of solder. Warning: This product contains lead, a chemical known to the State of California to cause cancer and birth defects and other reproductive harm. TABLE OF CONTENTS INSTALLATION PREPARATION . . . . . . . . . . . . . . . . . . . . . . . . . .2 PARTS SUPPLIED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 INSTALLATION OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . .2 ALTERNATIVE TRANSDUCERS AND MOUNTING METHODS . 4 TRANSDUCER EXCHANGE . . . . . . . . . . . . . . . . . . . . . . . .5 USING THE 350TX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 HOW SONAR WORKS . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 SIMULATOR OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . .7 WHAT YOU SEE ON SCREEN . . . . . . . . . . . . . . . . . . . . . . .8 CONTROL FUNCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . .11 MENU FUNCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14 ADVANCED FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 USING THE DIAGNOSTIC FEATURE . . . . . . . . . . . . . . . . . .25 USING ALTERNATIVE TRANSDUCERS . . . . . . . . . . . . . . . .26 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . .28 CUSTOMER SUPPORT . . . . . . . . . . . . . . . . . . . . . . . . . . .31 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32 Rev. 11016E INSTALLATION PREPARATION PARTS SUPPLIED PARTS SUPPLIED Before installing your 350TX, please ensure the following parts are included in the box: • 350TX fishfinder • Transducer with 6m (20') of cable and mounting hardware kit • Mounting system and mounting hardware kit • 2m (6') power cable • Publications kit If any of these items is missing, contact your local Humminbird dealer. ACCESSORIES Humminbird offers a wide assortment of accessories that complement and expand the capability of your new 350TX. These accessories are designed with the same high standards and are backed by the same one-year warranty. The Humminbird Accessory catalog included with your unit contains descriptions of the many accessories available and ordering information. All Humminbird accessories are available through your full- service Humminbird dealer. INSTALLATION OVERVIEW The 350TX consists of two primary components to install: the control head and the transducer. The control head contains the sonar transmit and receive circuitry, as well as the user controls and display. It should be installed in a location that provides access to the controls and visibility while in use. The control head mounts on a quick disconnect mounting system that swivels and tilts providing flexibility for viewing from almost anywhere on the boat. The transducer converts electrical energy from the transmitter into mechanical pulses or sound waves. The transducer also receives the reflected sound waves and converts them back into electrical signals for INSTALLATION PREPARATION INSTALLATION OVERVIEW display on the control head. It should be installed in contact with the surface of the water in an area that has smooth water flow - usually on the transom of the boat. There are several mounting options for the transducer. Review the following section to determine the method that works for you and your boat. Determining How to Mount the Transducer The 350TX includes a model XT-6-TB-90 transducer. This transducer can be mounted on the transom of the boat, or bonded to the inside of a fiberglass hull boat. The transom installation, which is the most widely used, places the transducer on the outside of the boat hull. This technique produces the least signal loss, and provides a way to adjust the transducer after installation. The mounting hardware included is designed to protect both the boat and the transducer should the boat strike debris in the water or when trailering. As an alternative to transom mounting, it is possible on many fiberglass-hulled boats to glue the transducer on the inside of the boat hull. Since fiberglass has similar sonar characteristics as water, the sonar signal can pass through the boat hull with minimal loss. The hull of the boat must be single layer construction (not double-hulled). Also, any air trapped in the lamination of the fiberglass would prevent the sonar signal from passing through. Tran...