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jaybond007
Occasional Visitor
Joined: Mar 02, 2007
Posts: 4
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 Posted: Fri Mar 02, 2007 2:41 am Post subject: 24v Input Query |
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| I have just bought a Navman F20 after my old i3 was damaged. Unlike my i3 which had 12/24V adaptor the Navman only says 12V. Thing is my old i3 adaptor still works and connector seems to be same size and would fit into my Navman. Tempted try use it instead of the one which came with the F20 and plug it into 24v socket in truck but worried it my blow or something. Think it will do any harm? |
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tonys66
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Joined: May 25, 2006
Posts: 510
Location: norfolk
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| Posted: Fri Mar 02, 2007 2:59 pm Post subject: |
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taken from hints and tips from navman site
If you have a 24V vehicle, turn the engine on before plugging your Navman in to a power source to prevent power surges.
As i own a TT and mine works i am not sure about navmans You can emil navman from there site to confirm if yours will or willnot or no doubt some one else who has one will answer soon |
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jaybond007
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Joined: Mar 02, 2007
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| Posted: Sat Mar 03, 2007 2:41 am Post subject: |
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Cheers Tony, i will send Navman an email as i'm sure they must get lots of questions from truckers about this 24V problem. Good advice about avoiding power surges, as never considerd starting engine up before plugging in but will do that from now on  |
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robertn
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Joined: Feb 06, 2005
Posts: 564
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| Posted: Fri Mar 23, 2007 3:36 am Post subject: |
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| Quote: | | If you have a 24V vehicle, turn the engine on before plugging your Navman in to a power source to prevent power surges. |
I doubt it, I'm not from Navman and I don't know much except... how the hell is your Navman charger going to know if the high energy spike is from starting or something else, and only blow up if it's a starting spike?
Some 24V systems will sometimes generate spikes big enough to fry your 12V rated device (pay particular attention to the "some" word) . This happens mostly when starting, but can happen anytime, partlculary when big loads kick in and out (Like starter motors). You can risk it if you want, me personally, I prefer not to let the smoke out of my electronic toys.
The main thing for your F20 is it needs a regulated input voltage - probably 5V if it's anything like all the older Navman models. Check the output of the Navman charger and input to the F20. It should be printed n them.
Check the voltage and polarity (Use a Multimeter if it is not printed on the chargers or devices). If this is the same (center positive is most common), and the voltages match, use the i3 charger.
If the polarity and/or plug is different and the voltage the same, an auto electrician or electronics repair shop can put a new plug on. If in doubt, take it to a auto electician, he'll sort you out. |
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