Question about Uniden Qt206 Thru Hull, Digital Depth Gauge

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Unit showing 88.8 in the LCD window.

Hi - I've just purchased an Impulse QT-206 Digital Depth Sounder and notice the unit shows 88.8 in the LCD window. Is there anyway I can repair this so it works properly?


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Hello geld1. Your problem is the transducer, cable or connector. Check transducer with an ohm meter, flex the cable while ohming the restance shouldn't change. The location and mounting of the transducer could be the main problem. Use the the correct gel film including a secure postion support.

Posted on Oct 19, 2008

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I have a boat with a Uniden QT-206W depth finder in it and I can't figure out how to get it to work correctly in my boat. Is there any manual or information I can get to help me with this? It has 3 digits on the gauge and no decimal point and it is telling me that the water depth in the Mississippi is for an example 186' deep and the numbers will flash at different intervals.

Posted on Jun 26, 2009

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Hello, I would like to know, how to change the '' units of measure? How to change feet to meters? Model: QT-206W depht Thanks Vini.

Hi Vini!

There is no "meters" option on your unit. Feet is the only unit of measurement available.

In case you've misplaced your owners manual, you can view/download it at:

Hope this helps

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I was told that the Uniden QT-206HP depth sounder will not work thru an alunium hull is this true or false


The transducer for your depth gauge will not work through an aluminum hull. A drilled through-hull transducer or a transom mount transducer are your options here.

Just in case you require it, your Owners Manual can be viewed/downloaded at:

Hope this helps..

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When we are deep water (500 ft or deeper) the fish finder will display 3.5-10 ft. and won't show the fish or shows tons of fish. Are we able to set the depth that we would like to see eg: if we are...

Im not familiar with your particular unit but you should be using a low frequency transducer for water over 500'; something like a 50 kHz transducer or a dual frequency transducer like a 50/200kHz for detail with the high freq. but increased depth range on the lower frequency. As far as setting it to 250 ft, you should be able to use the range feature and adjust the maximum to 250'. typically the factory default is automatic so it will caonstantly adjust the range based on the maximum current depth.

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The LST 3800 powers up and on the display it shows backlight. every now and then it will cycle through the optional menus. When I press the menu button or the up and down buttons nothing happens.

I just purchased a 2007 VIP Vantage with an LST 3800 and it was experiencing similar problems. I noticed that the "UP" button didn't feel right when pushed, so I pulled it out of the dash and used a very small screwdriver to gently pry off the front bezel. There's a clip on each side that holds it in place, and it's fairly easy to remove. The rubber button pad had a tiny piece of plastic (it was the same material and color as the plastic in the bezel) between the bezel and the button pad that was causing the "UP" button to depress constantly. I put the button pad back into the bezel, snapped it back on and the depth sounder is working fine. Best of luck.

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Need connections for the uniden qt-206 um200f to connect the wires to a airmar p79 tranducer

The P79 connects to the QT 206 as follows.
Red and black are side-by-side (red on the left) while the shield connects below the red. In case anyone requires it, here is the link to the QT 206 owners manual.

Hope this helpful

Jul 30, 2010 | Uniden Depth Sounders UNDQT206WHP ()

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Furuno 4100 depth sounder shows depth twice what it really is

check your gain setting try auto gain and try manually gaining back to see if it resolves, if yes, send unit in to furuno, if no, ducer is probably at fault.

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2 Answers

Picture freeze

It sounds like a software issue. If the depth still shows numbers and not dashes, that indicate that the DSM and trandsucer is working. Be sure that you have the most recent software for the E120 and for the DSM. You can find info about the current software and how to load it on Raymarine's website. It is important to perform a factory reset once the new software is loaded. If that doesnt solve your trouble, you will need to consult Raymarine's tech support dept.

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Replacement of an old Impulse QT206

I believe it is the same model. Even if it is different, it will probably work if it has the same type of plug.

Jul 14, 2008 | Uniden Qt206 Thru Hull, Digital Depth...

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