Question about Dell Latitude X300 Notebook

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What signal is sent over the center pin of the adapte pug?

As i found out on the internet my Dell x300 latitude cannot charge the battery because i use another ''Dell'' adapter with the same ratings though. The cause is the signal sent over the third pin by the original adapter that tells the laptop to be able to charge the battery.
My question: is there anyone with the original adapter who can view this signal on an oscilloscope? Maybe it is just a steady voltage that is needed, maybe a complex digital code, maybe a simple one that can be imitated by a simple circuit or even a tape recording.
Anyone have any ideas about this?

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My best bet to say for to go to an electronics store and mach up a new one, because to try and test the one you have now would be more costly than to replace it. biigg53566

Posted on Dec 04, 2008

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1 Answer

Dell d610 latitude wont charge new battery


Hey,
First off, do you have a way to check the output of the ac adapter to ensure it's putting out the correct current?
If you've done that and have a multimeter handy, you can remove the battery, system off, and check the charge pins for current/voltage. I believe one of the end pins is neg (ground) and at least one of the other pins should show 2.6-3.6V, as well as other various voltages. If you fail to get any response at the charger pins, we'll need to look at the board circuitry, assuming again that the ac adapter is operating properly.
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