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Lowrance LMS 335C DF transducer

WAS WORKING NOW NOT READING BOTTOM VERY GOOD AND NOT READING FISH

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  • Anonymous Apr 11, 2009

    reads depth and idle and very slow speeds but makes bad readings at speed

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3 Suggested Answers

hydetech
  • 113 Answers

SOURCE: My Lowrance LMS-337c df keeps going crazy.

Normal 0 false false false MicrosoftInternetExplorer4 st1:*{behavior:url(#ieooui) } /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;}This could be caused by glitch in the operating systemsoftware or by low voltage due to a short in the unit or somewhere in the boatswiring. To troubleshoot the problem Iwould recommend the following steps.

  1. Try a soft reset
  2. If the problem resurfaces, try a hard reset
  3. Update the the operating system software

Soft Reset (Does not delete GPSData)
1. Turn unit OFF 2. Press and holdthe PAGES key
3. Press and hold the PWR key
4. Release both buttons when the USA map
Appears

Hard Reset (Deletes stored GPS Data
such as Waypoints and trails)
1. Back up any waypoints, routes,and trails that you want to save on a blank MMC card
2. Turn unit OFF
3. Press and hold the ZIN&ZOUTKeys at
the same time
4. Pressand hold the PWR key
5. Release both buttons when the USAmap
appears

To update the operating system software, check out this link:
Lowrance337c df update


If you don't have a card reader I can program an update card for you.


Posted on Dec 16, 2008

  • 1 Answer

SOURCE: My Lowrance LMS-337c df keeps going crazy.

Have the same problem. Have you resoved it?

Posted on Jun 20, 2009

  • 1 Answer

SOURCE: My Lowrance LMS-337c df keeps going crazy.

Mine does the same thing when the voltage is low. The GPS part will drain the battery if left connected. Learned the hard way. I installed a battery isolator switch, the one with the big red key, and switch the battery to "Off" when finished. Either that or unplug your unit each time. Still, if the battery is not maintained during storage, the same problem will arise until the battery has been fully charged. Never has done this when the outboard is running and current is going to the battery from the alternator.

Posted on Jan 24, 2010

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You can probably get the parts from a dealer, or any marine electronics retail like Bass Pro and Cabelas or any of those kinds of places.
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http://www.lei-extras.com/store/search.asp?SearchType=Category&Category=200+khz+transducer

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G'day
I had a similar problem of the unit turning off when the engine was started.
I simply replaced the battery as the one one boat was only registering about 11 amps. This unit requires amps to be over 12 to maintain the readings. This fixed my problem at least.
If you are not getting a reading on the transducer you may need to make some slight adjustment on the transducer itself. Is it installed correctly? There is a manaul with pictures detailing the exact method of installing the transducer. It is very important you get this right.
Good luck mate
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Hi,

you can find the manual here,
www.lowrance.com/upload/Lowrance/Documents/Manuals/LMS339cDF_iGPS_0152-011_011206.pdf

Hope my info solves your problem,
Thanx for using fixya.....

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I have a manual for this unit but i'm still using mine so not willing to sell it to you. I'm in Melbourne and you're welcome to borrow it for a week or so or i could probably photocopy/scan certain sections for you and email them if it helps. Let me know if you still need it by emailing me at joshklat@hotmail.com

Cheers,
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