Need help with Low. LMS-520c

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08-29-2009, 06:52 PM
UTFAN

Need help with Low. LMS-520c

Friend bought the unit used and when he hooked it up. It read GPS module not responding. We have the gps puck connected. Any suggestions?
08-29-2009, 09:09 PM
Barnacle Bill

Have you seen this? It applies to your unit. http://www.lowrance.com/upload/Lowra...971_052307.pdf
08-29-2009, 09:36 PM
possumcop

there are three lines coming out of the power cord hook up. one is a comm. cord, one is power for the gps puck and it will have a red and a black wire. it has to be hooked up just like the other red and black wires which are for the power for the unit. if you do not do this the unit will read gps not responding. i have 2 of these on my boat so that is how i know. I have been using lowrance gps units for years so i am feeding u any bull. if the 3 cords are still marked with a little piece of silver tape, you can read what they are. the power for the gps puck will say nmea power.
08-29-2009, 09:53 PM
Cane Pole

Quote:

Originally Posted by possumcop

there are three lines coming out of the power cord hook up. one is a comm. cord, one is power for the gps puck and it will have a red and a black wire. it has to be hooked up just like the other red and black wires which are for the power for the unit. if you do not do this the unit will read gps not responding. i have 2 of these on my boat so that is how i know. I have been using lowrance gps units for years so i am feeding u any bull. if the 3 cords are still marked with a little piece of silver tape, you can read what they are. the power for the gps puck will say nmea power.

yep.
08-29-2009, 09:54 PM
Cane Pole

Go to Lowrance and download the user manual.
08-30-2009, 06:09 AM
UTFAN

Thanks I'll tell him today, maybe we can get it going.
08-30-2009, 02:12 PM
UTFAN

OK He has the power connected correctly, I think. He has a network connector instead of a T (3-way)connector. Do the other two open ports need to be terminated?
08-30-2009, 04:17 PM
jaxsprat

If it still doesn't work I would remove that network connector & at least temporary hook it up like Cane's drawing to see if that's the problem, or then again maybe GPS problem was the reason somebody sold it off??????????
09-03-2009, 04:48 AM
Crappie Reaper

curious, what did he have to give for the used unit?
What all did he get with it?
09-03-2009, 06:13 AM
Crappie Chatt

Ifin it is wired correctly & still shows 'module not responding',,, ya might as well bite the bullet and buy :( a new antenna. <*)}}}><
09-03-2009, 07:14 AM
PanMan_VA

Quote:

Originally Posted by UTFAN

OK He has the power connected correctly, I think. He has a network connector instead of a T (3-way)connector. Do the other two open ports need to be terminated?

Yes, the NEMA bus needs to be terminated. Look under LowranceNet Red to get the part numbers you need from the link below. I'm not sure if the parts are available a la cart or not.

http://www.lei-extras.com/store/sear...&Unit=LMS-520C
09-04-2009, 04:38 AM
speckfinder

if you have the "network connector" which is a wire-not a "T", you should be able to use it. if my memory serves me correctly you only need 1 60 ohm terminator with this.