Marine Electronics Forum - Furuno NavNet vx2- keeps shutting down (HELP!!!)

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Paperchaser256
03-26-2012, 03:38 PM
Just got a new boat a month or so ago and I'm having issues with the NavNet vx2.

Issue:
Unit was new in 2007. Really good shape physically and Radar is hooked up to it as well.
It turns one and within about 20- 30 mins it starts acting up. Brilliant (brightness) goes up and down erratically 8,7,6,5,6,7,8,7,6,5,4,5,6,7,8...then it starts counting down a shut down randomly...3,2,1,3,2,3,2,3,2,1 then it just shuts off completely. I have to basically unplug the power for a while and give it some time and then it will work again, for a shrt while.

Background:
Owner said he had issues with the radar working...sent it to Furuon and they replaced the radar board in the vx2 unit itself and had Furuno fix it six months ago. He also said he replaced the cord that connects the unti to the radar so thats new. The radar works...when the unit stays on. He's also sent the vx2 back to Furuno a few weeks ago and he said Furuno replaced the power button b/c it was bad. He says they hooked it up and it tested fine and they updated the unit while it was there and sent it back.

What I've done to try to isolate it:
We thought it was a load or wiring problem so I tested the voltage everywehere and it seems fine. Over 12 volts on the battery(s), at a terminal bus, at the fuse box and even at the end of the power cable that goes into the unit itself. Even after it shut down on me yesterday I disconnected it and measured at the power cord and there were over 13 volts. I even tried wiring the fuse panel straight to the battery and still the same issue. Oddly enough the last 2 trips out it has lasted 2 hourts and then 1 hour before shutting down though.
I tried disconnecting the radar and seeing if it still happened today and it wouldnt even turn on this time. Just kept beeping like it was trying to start up but it wouldn't.


THT has always delivered. Can it once again?

Any suggestions would be greatly appreciated! Thank you,


mstyle8517
03-26-2012, 04:25 PM
If you can get the unit down to Commercial Marine Electronics in Pompano Beach, FL, I think they would be your best bet. Just off the top of my head, if this was in my shop and I was trying to isolate, I would throw a different front bezel on there (keypad and all) to see if the problem stops. Intermittent electrical issues are a tough one - good luck to you.

Idiot
03-26-2012, 05:47 PM
it sounds to me like there is still an issue with the power button. when you press and hold the power button, the unit counts down before shutting off. if you tap the power button, it cycles through the brightness levels.

if the button pad is defective or the contacts are corroded, it could be simulating random button presses.

maybe they didn't install the new button properly or didn't notice some corrosion on a connection inside the unit. i would send it back in.


Paperchaser256
03-26-2012, 06:30 PM
If you can get the unit down to Commercial Marine Electronics in Pompano Beach, FL, I think they would be your best bet. Just off the top of my head, if this was in my shop and I was trying to isolate, I would throw a different front bezel on there (keypad and all) to see if the problem stops. Intermittent electrical issues are a tough one - good luck to you.

I will certainly consider this, thank you

Paperchaser256
03-27-2012, 08:50 AM
it sounds to me like there is still an issue with the power button. when you press and hold the power button, the unit counts down before shutting off. if you tap the power button, it cycles through the brightness levels.

if the button pad is defective or the contacts are corroded, it could be simulating random button presses.

maybe they didn't install the new button properly or didn't notice some corrosion on a connection inside the unit. i would send it back in.

I got a message from a guy from Furuno who seems very nice and willing to help me get this figured out so I remain optomistic. Any advice from THT is always appreciated though so thanks everyone!



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