Question about Lowrance LMS-330C GPS Receiver

1 Answer

GPS module not responding

I did the obvious checkin of all the connections. Nothing. I bought a new antenna for $200, hooked it up and it worked. The weekend came around, I turned it on and "GPS module not responding" again. What could it be?

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  • Pirates96 Oct 04, 2008

    I have the same problem and mine is blowing fuses. The GPS is powered seperate from the sounder. I am still looking the solution to the blown fuses.

  • scott925 Mar 08, 2009

    This is the second time it's happend to me and I checked the connections and made sure the seperate power lead was getting power to the main unit. (whiched fixed the problem last time) but I have not tried getting a new antennea yet.



    I will let you know...



×

1 Answer

Check the power connections to the antenna

Posted on Sep 06, 2008

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Lowrance 330c gps not responding


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HAVING A PROBLEM WITH MY LOWRANCE 525C WITH EXTERNAL ANTENNA. IT KEEPS TELLING ME GPS MODULE NOT RESPONDING. I HAVE CHECKED ALL CONECTIONS AND CANNOT FIND A PROBLEM. WHAT NEXT


Make sure that you have powered the NMEA 2000 network. The display unit's power cable has a set of red, black, and sheild wires that need to be hooked up to a 12VDC power source. There is a power diagram somewhere in the manual that should show this.

Make sure that you have the NMEA 2000 network connected properly. If it is a newer version LMS-525, it should just be a single 15ft cable that has two female ends, the module plugs into one end, and the other end plugs into the back of the display.
If it came with some T connecters and 120Ohm Terminator caps, then make sure you have that hooked up correctly. There should be a diagram in the manual for that as well but you just connect the two T's together like TT, put the 120Ohm terminators at each end, and run the extensions to the display and GPS module.

There is a decent troubleshooting guide for checking to make sure power is getting to the module at http://primus.lowrance.com/support/resultDisplay.do?gotoLink=92&docType=1000&contextId=426%3A92.273%2C600.639%2C92.113&clusterName=ClusterPublic&lang=english&docset=%2FDocuments%2FTroubleShooting%2FNew+Utility&contentId=42296cce-4f9b-40c8-9dcf-33d5df754009&responseId=135ccbe2cfd4f608%3A1fe88d%3A1225c5cc17c%3A-bac&groupId=4&answerGroup=1&score=986&page=http%3A%2F%2Fprimus.lowrance.com%2Ficr%2FTroubleShooting%2FNew+Utility%2FNU_GPS_ModNR.htm&result=0&excerpt=Module+Not+Responding+The+GPS+module+not+responding+(early+GPS+products+may+also+indicate+coupler+not+responding)+indicates+that+the+unit+and+module+are+no+longer+communicating.&question=gps+module+not+responding&resultType=5000#Goto92

If this doesn't tell you anything, most likely the GPS module is bad.You will need to contact Lowrance support to get it repaired/replaced. You can call them at 800-324-1356 or email them at http://www.lowrance.com/en/Support/Product-Support/Contact/

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Make sure that you have the NMEA 2000 network connected properly. If it is a newer version, it should just be a single 15ft cable that has two female ends, the module plugs into one end, and the other end plugs into the back of the display. If it came with some T connecters and 120Ohm Terminator caps, then make sure you have that hooked up correctly. There should be a diagram in the manual for that as well but you just connect the two T's together like TT, put the 120Ohm terminators at each end, and run the extensions to the display and GPS module.

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1 Answer

X15mt


I believe the antenna on that model is a "smart" antenna, which means that the receiver is in the antenna, not in the display, and it is connected to the back of the display with a multi pin plug that provides power and data link to the antenna.

If the antenn is mounted directly in the path of a RADAR beam from a RADAR antenna on your boat, the antenna will not acquire satellites while the RADAR is on.

More likely you have a bad connection:
1) remove the display from its mount
2)gently tug on the GPS cable to see if it comes off without twisting. If it comes off make sure it is aligned, push it back on twist the locking ring and try again.
3) if GPS plug is properly installed and unit doesn't work, remove the plug and and check the pin holes for corrosion, also check the socket in the back of the display for damaged or missing pins. Anything that interrupts power or data will cause the antenna to stop working. If there are no obvious signs of corrosion or damage, then the problem is most likely in the antenna processor. If you have access to another antenna, or if you know somebody who has any model Lowrance with the same plug on their GPS try running your display on their antenna. If it works elsewhere then you need a new antenna, which is probably just as cheap to buy new as to have repaired. If it doesn't work then you probably need to remove the display and antenna and send it out for service.
4) Before you send it out there is a slight possibilty that the problem lies in your display processor. Make sure you have the latest software update in your display. The software version should appear on the display when you first start it up. Click here to compare your version to the most current version available. If your software is not current, download it to a blank data card, place the data card in your chart slot, and turn on the display. The screen will prompt you on what to do next. If that doesn't work then repair or replacement is your only option.

I hope this helps, please contact me if you have any questions , or if you decide to replace it I'll be happy to offer advice about new models.

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