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post #1 of 3 Old 10-29-2008 Thread Starter
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N2k issue

Hi all,

I have having a NMEA 2000 network issue, a bit of a puzzle. The network is as follows.

Lowrance 7300 HD Chartplotter
Simrad Combi Depth and Speed
Garmin GMI 10 display
Lowrance 3000 GPS puck

So before the last big storm to blow through, I took the chartplotter home. Now, when I connected it back, the GMI-10 is not getting course information from the chartplotter. When viewing the status page on the GMI-10, I sometimes does not see the chartplotter, sometimes is shows up as an unknown Lowrance device, and sometimes as the 7300 HD that is it. The course information showed up once or twice on the GMI-10, but usually nothing is shown.

The Chartplotter sees the rest of the network fine. It gets the GPS puck, the depth, etc.

So does this mean that either the cable has a bad connection, only one pin, going from the chartplotter to the network, or perhaps a bad connector on the back of the Chartplotter?

Any troubleshooting tips?


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post #2 of 3 Old 10-29-2008
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I Have a smaller 3500C with fuel flow and find it is just funky at times

For example when changing the fuel tank size to leave a better reserve it has had a fit that required reboot

My unit has had at least 5 firmware updates that have adressed NEMA 2000 problems as they become known and my GPS puck has had 2 updates

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post #3 of 3 Old 10-29-2008
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I doubt the cabling is the problem, since NMEA 2000 cabling is pretty simple and fairly robust. My guess is that you got crud in the socket on the Chartplotter when you took it home. Did you carry it in a carry case or just put it in a bag with other stuff... try cleaning out the pin sockets..

Generally, the problem's solution has to do with what you mucked with last...and the problems are usually more commonly the simpler ones, rather than the more complicated ones... If you hear hoofbeats, you generally don't think about Zebras, unless you live in Africa.


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