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LCX-15 MT Lowrance operation questions

Old 07-26-2005, 05:26 AM
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Default LCX-15 MT Lowrance operation questions

I fish on Lake Michigan out of Manitowoc and Two Rivers. I have the daul 200/50 kilohertz transducer transom mounted on my 205 Carerra Thompson. In water up to about 60 feet deep the unit reads fine. Deeper than that I loose Grey line and ability to mark downrigger balls and fish on either transducer setting. Depth will also start to flash periodically. I have turned up the chart speed, ping speed, greyline, sensitivity and have not been able to change the results. If I come back into shallower water the unit starts to work fine, I can back off my settings and I am good to go. In talking to Lowrance they suggest I have a bad transducer or unit and should take a friends unit out and switch them to narrow down to the bad unit or transducer. Any other thoughts on what might be a problem? Thanks in advance.

Cap'n Morgen
Old 07-26-2005, 07:03 AM
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Default Re: LCX-15 MT Lowrance operation questions

If your boat is wet slipped try cleaning the bottom of the transducer puck, if trailered look at the bottom of the puck for damage.
Old 07-26-2005, 09:06 AM
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Default RE: LCX-15 MT Lowrance operation questions

trailered, no damage.
Old 07-26-2005, 10:55 AM
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Default Re: LCX-15 MT Lowrance operation questions

It sounds like transducer problems to me, too. If you can do that test, I would. Lowrance will probably replace it for free.

Make sure all connections, plugs and fuses are clean and no power is being lost.
Old 07-26-2005, 12:54 PM
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Default Re: LCX-15 MT Lowrance operation questions

I got also LCX-15 MT and I had exactly same problem that you have in your sonar. I did that test and find out the transducer was bad. Well, I bought a new transducer and the problem was fixed. Lowrance didn't replace it for free and you can be sure that this is my first and last Lowrance!
Old 07-26-2005, 01:33 PM
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Default Re: LCX-15 MT Lowrance operation questions

FinFisher, did you ask them to replace it?????? They almost always will if asked in a nice manner.......
Old 07-26-2005, 02:34 PM
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Default Re: LCX-15 MT Lowrance operation questions

Bailey Boat, I did. Here is the answer that I got from the Lowrance International. This mail is from january 2005. My sonar is bought in 2001.

"Thank you for your inquiry. There are many factors that can effect the sonar performance. While some have experienced problems with the dual frequency transducer, the vast majority of sonar problems can be resolved by trouble-shooting. You may have attempted some of these suggestion. Please check your transducer to make sure it is still intact, parallel to the bottom, and not scratched up or dirty. Check the plug for oxidation and check the cable to make sure it is not pinched or crimped. Make sure no other electronics are turned on and run the sonar unit by itself. Shut the main engine and trolling motor off so there is nothing that can interfere with the sonar.
This is the best way to troubleshoot to see if the problem is in the unit, transducer, or caused from an outside source. Be aware that stained water and water turbulence caused from boat movement, windy conditions or currents can also cause erratic results. If the problem persists you can try connecting the head unit to another Eagle or Lowrance transducer to determine the cause of your problem. If the transducer appears to be working correctly the unit may require service. Unfortunately, due to the age of the product, service or replacement of the unit or transducer would no longer be covered under a warrantee."
Old 07-26-2005, 02:37 PM
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Default Re: LCX-15 MT Lowrance operation questions

Sounds like you tried, some times they will do a goodwill sort of replacement just to keep a customer happy.
Old 07-26-2005, 03:45 PM
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Default Re: LCX-15 MT Lowrance operation questions

I would also play around with the position of the transducer. I have the same machine and trnasducer and I had to play with the angle of the transducer to get a good reading.
Old 07-26-2005, 03:56 PM
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Default Re: LCX-15 MT Lowrance operation questions

"Lowrance didn't replace it for free and you can be sure that this is my first and last Lowrance!"

"This mail is from january 2005. My sonar is bought in 2001."

Three years out of warranty? ;?
Old 07-27-2005, 02:37 AM
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Default Re: LCX-15 MT Lowrance operation questions

Nimrod, the machine is old but this problem is such a common that it should be fixed for free.
Old 07-27-2005, 07:48 PM
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Default Re: LCX-15 MT Lowrance operation questions

I have the same situation going on with my LCX-15MT
The real issue is they no longer make or support this model.
I got into a debate with them about "support" but, you can no longer find it listed on their website and there are no more downloadable updates. ( I did download the last one from last Fall). Having just ordered a new transducer, I can tell you that they are not giving them away for this model.
Old 07-27-2005, 11:35 PM
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Default Re: LCX-15 MT Lowrance operation questions

I wouldn't have belived it if I hadn't read it here, but more than one person solved depthfinder problems by cleaning the bottom of the transducer even though there was no visible sign of grow of contamination ?!?! Can't hurt to try it.
Old 07-30-2005, 06:39 PM
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Default Re: LCX-15 MT Lowrance operation questions

Agree with stevec above. 300-400 grip emery cloth should do the trick.

Am curious why you would have a 200/50 KHz transducer as I didn't know there was anyplace in Lake Michigan where you would need at 50 KHz transducer unlewss you use it for something I am not aware of?
Old 08-01-2005, 09:13 AM
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Default Re: LCX-15 MT Lowrance operation questions

I will give the cleaning a try. The dual transducer came with the unit. I like the feature of the 50 because it marks the downrigger balls very well. I know that the single 200 has a wider beam than the dual 200. Do people mark their downrigger balls with the single 200 as well. If I do have to replace it I will have to consider which model ducer I will go with. I am going out wednesday night with a friends unit and a 200 transducer in hand so I can troubleshoot on the water. I will be able to switch units and transducers so I should be able to figure out if it is the unit or the ducer. I will let you know how I do.

Capn Morgen
Old 08-13-2005, 05:59 PM
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Default RE: LCX-15 MT Lowrance operation questions

Saw this on another board "the way to tell how deep water is when you own a Lowrance unit, is to attach it to a line counter reel. reset counter, and drop it over, cut line before reeling in to save your sanity"

My LCX 15 MT and LCX 16 CT both had the same problem, needless to say, no more Mexican made Lowrance units for me,
Old 08-13-2005, 09:18 PM
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Default Re: LCX-15 MT Lowrance operation questions

Does anyone know where are the new LCX models are made? I'm considering at LCX-111
Old 08-14-2005, 08:50 AM
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Default Re: LCX-15 MT Lowrance operation questions

I have a x97d model and i am also having trouble reading past 70'. I don't know what to do.

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