Question about Humminbird XNT Transducers XNT 9 20 T Mounting Unit

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My Matrix X25 used to function correctly but it gives me now erratic depth readings and at times get paralyzed on a 7 or 8 meters reading? The auto test indicates that the sounder is OK I checked the power supply and (visaully) the cables.Can the transducer be at fault ? I am playing as an amateur with electronic and I own an oscilloscope. I am playing with the idea to test the Display unit at Home (the transducer is a below hull type on a sailboat) to check at least the emissions and the frequencies but I assume that I would have to replace the transducer with a dummy load. Would a simple resistor do and of which value, else which impedance should be the transducer ? Many Thanks my email address is jmbonnamy@aol.com and I live in France

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My unit, a 365i combo, uses the same transducer, I experienced the exact same problem last week, my unit is still under warranty, I sent the unit for repair and just got confirmation that my transducer went bad. The bad news is that the transducer is back order and has been for many weeks, this is an indication of probably a weak design. I have read similar reports on other forums.

Good luck

Posted on Sep 03, 2010

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