Question about PC Laptops
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 and 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.
Anyone have any ideas about this?
The problem isn't in the psu - it's in the laptop. The centre pin supplies a trigger voltage with a simple carrier which tell s the BIOS about the power characteristics of the unit. Missing that signal, the BIOS assumes that even though there may be enough power to run the laptop, there may not be enough to charge the battery - a situation that, on lower power PSUs, can lead to damage to PSU and/or laptop. That's a safety feature that it doesn't attempt to trigger the charging circuit. The most likely reason for that trigger being missing is the (very poorly-designed) PSU interface having become disconnected from the rail. The socket needs replacing.
Posted on Jul 21, 2009
Tips for a great answer:
Aug 02, 2013 | Dell Latitude X300 Notebook
Feb 28, 2010 | Dell Latitude X300 Notebook
Feb 15, 2010 | Dell Latitude D620 Notebook
Feb 04, 2010 | Dell Latitude D620 Notebook
Jan 10, 2010 | Dell Latitude D600 Notebook
Jul 15, 2009 | Dell Latitude X300 Notebook
Jun 17, 2009 | Dell Latitude X300 Notebook
Dec 18, 2008 | Dell Latitude D600 Notebook
Dec 04, 2008 | Dell Latitude X300 Notebook
Nov 26, 2008 | Dell PC Laptops
91 people viewed this question
Usually answered in minutes!