Question about PC Laptops

1 Answer

What signal is sent over the center pin of the power adapter?

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?

Posted by on

  • Joe May 11, 2010

    What is the adapter PA Family? ie PA-6,PA-9 etc.

×

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that gotĀ 5 achievements.

    Governor:

    An expert whose answer gotĀ voted for 20 times.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Expert
  • 81 Answers

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

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

My Dell Latitude x300 monitor is dark (black) while the computer is running. I plugged it into a stand alone monitor and it was also black. how do it fix it.


Your graphics card adapter is damaged!
buy a new card to your dell laptop
and let someone with experiense change it.
This is your solution! Please vote!!!

Feb 28, 2010 | Dell Latitude X300 Notebook

1 Answer

Universal power supply targus tip for Dell Latitude D620, won't charge battery, pop up says slow and no (charge), use only Dell. Is there a Targus tip that will go on Model APA10 Targus Universal power...


the problem is the BIOS of the Dell system is looking for an ID signal from the AC adapter so it knows what adapter is connected. If the BIOS cannot ID the power supply, then battery charger is disabled.

You will need to get a Dell AC adapter.

http://www.discountelectronics.com/index.php?l=product_detail&p=1459

Feb 15, 2010 | Dell Latitude D620 Notebook

1 Answer

Dell Latitude D620 isn't getting power to the mainboard.


diagnostic procedures as follows:
1. Turn off the computer and peripherals, and disconnect them from AC power.
2. Reseat each installed battery by removing it and then replacing it.
3. Turn on the computer. Does the green power indicator light up?
Allow one minute for the computer to initialize its components before checking for signs of power.
Yes. Continue to step 4.
No. Use the AC adapter to connect your computer to AC power. If the computer operates normally when using AC power, go to step 7. If the computer does not boot when using the AC adapter, see the previous subsection, "Total Power Failure When Using the AC Adapter."
4. Does the battery indicator flash amber or show a a steady amber light?
Yes. The battery needs to be charged. Go step 5.
No. Go to step 7.
5. Connect the computer to AC power, and fully charge the battery.
For instructions, see the topic titled "Charging the Battery" in the online System User's Guide.
6. As the battery charges, does the green battery indicator light up?
Yes. Go to step 9.
No. Go to step 7.
7. Is the battery indicator flashing green and amber?
Your computer may be in a hot environment. Charging the battery in this condition may affect the life span of the battery.
Yes. Continue to step 8.
No. The problem is resolved.
8. Disconnect the computer from AC power. Is the the battery indicator still flashing amber?
Yes. You may have a defective battery. Continue to step 9.
No. The problem is resolved.
9. Remove the battery, and press its test button. Is the uppermost indicator in the charge gauge of the battery flashing?
Yes. You have a defective battery. Continue to step 9.
No. The problem is resolved.
10. If a spare battery is available, fully charge it, and then install it in the computer.
11. Turn on the computer. Is the power indicator off?
Yes. Your original battery is defective. get a new battery replacement.
No. Call Dell for technical assistance.

if you need Dell latitude d620 Battery you can go to online shop

http://www.global-battery.co.uk
http://www.sales-batteries.com

here you can perchase high quality battery easily
good luck!

Feb 04, 2010 | Dell Latitude D620 Notebook

2 Answers

My Dell D 600 will not charge the battery and a message appears at start up that says Ac adapter not recognized What do I need to do to get my computer to charge the battery


If the AC adapter is not recognized by the system, the battery charger circuit is disabled. Things you can check:
  1. In the barrel of the connection to the computer, the small wire in the center is the sensing wire. If bent or broken, then the adapter will need to be replaced.
  2. If the pin is not bent or broken, try a different AC adapter (Any D-Series Dell adapter will work) IF that adapter works, replace the AC adapter.
  3. If a known good/new adapter doesn't resolve, then a motherboard needs replacement.

Jan 10, 2010 | Dell Latitude D600 Notebook

3 Answers

Battery not charging


Does the battery accept a charge from the another laptop ?, the only way you will know if this is happening is to run the battery down till it warns the laptop it is failing and them plug it into the other machine

If the battery re-charges then it is fine, if not you need to replace it


If your machine works with the AC but the battery stays flat then you have a fault on the onboard circuit that trickle charges the battery and you need a techie

Jun 17, 2009 | Dell Latitude X300 Notebook

2 Answers

Dell 610 - battery will not charge and adapter goes "blink"


http://support.dell.com/support/edocs/systems/ins6400/en/index.htm

aneesnv@msn.com

Dec 18, 2008 | Dell Latitude D600 Notebook

1 Answer

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


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

Dec 04, 2008 | Dell Latitude X300 Notebook

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.
Good luck

Nov 26, 2008 | Dell PC Laptops

Not finding what you are looking for?
PC Laptops Logo

Related Topics:

91 people viewed this question

Ask a Question

Usually answered in minutes!

Top PC Laptops Experts

Les Dickinson
Les Dickinson

Level 3 Expert

18304 Answers

joecoolvette
joecoolvette

Level 3 Expert

5660 Answers

Brian Sullivan
Brian Sullivan

Level 3 Expert

27725 Answers

Are you a PC Laptop Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...