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Dear sir do you happen to have circuit diagram for acer aspire 5570 , the 19v dc power in connection pin broke in two. i need the schematic diagram for this power system board which lead to the battery thanks michael

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Connect the adapter to the laptop and power it up, then look at the power/battery charging LED light and wriggle the power plug in the laptop's power socket. If the power/battery LED light flashes and in a certain position this LED light stays firm, then the power socket is either faulty or it has a dry solder joint where it is connected to the motherboard.
This can be repaired but it requires the laptop to be completely dismantled to get at this power socket and repair. If you cannot DIY then I suggest you get a quote first.

Posted on Sep 10, 2010

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Posted on Jan 02, 2017

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2 Answers

Schematic acer aspire -e1-571g


Due to the complicity of multi layer boards, schematics are not available. Manufacturers agree that if a motherboard fails under warranty, it is replaced, not repaired, so no need for schematics.

Nov 19, 2015 | Acer Computers & Internet

7 Answers

My acer aspire notebook 7736Z-4412 won't turn on. I have tried taking out the battery and using the adapter but it still won't turn on?


yes boss pl remove ur battery n start only ac supply if ur laptop on or not if run ur battery defective or not run at ac ur laptop ac supply ac to dc converter circuit problem pl send my address solved n send u

May 26, 2014 | Acer Aspire One PC Notebook

1 Answer

I need a schematic diagram for a HP4540s motherboard


Interesting user icon...........

I better get this right, huh? Bahahahahahaha!

Best I can do is a Block Diagram,

http://notebookschematic.com/?p=22530

Click on the diagram to enlarge.

Now what is the problem?

Need to know where to connect cables?
Need to know the Specifications to upgrade?

Problem with laptop, and you need to know what electronic components deal with that circuit?

DC - DC circuit (Charging / Power )
Motherboard chipset
Graphics chipset

Post back in a Comment.

Regards,
joecoolvette

Apr 11, 2013 | HP 15.6" ProBook 4540s B5P37UT Laptop PC...

1 Answer

I have Acer Laptop with a JV50PU motherboard which has a faulty DC input socket connection. The laptop works OK on Charged battery but not on DC input. Is it possible to get a schematic of the motherb


If the DC Power Jack is soldered onto the motherboard then take the time to unsolder it and remove it. Then buy another DC Power Jack which costs less than $8.00 and solder it into it's place. Normally when it is soldered onto the motherboard there is no cable involved. That's all there is to it if it's soldered onto the motherboard.

If it sits on a slot in the motherboard and has a cable harness attached to it then you can purchase that too for less than $15.00. All you do then is follow where the other end of the cable harness plugs into the motherboard and unplug it. Then place the new dc jack in the slot where the old one sat and plug the other end of the cable harness into the motherboard.

Mar 20, 2012 | Computers & Internet

1 Answer

Acer Aspire 5920 will not power on. Power Cord, Charger, Adapter and Battery work fine. Adapter lights up green, no power light on computer keyboard or On/Off switch. CPU Fan is not working. Is there a...


There is a cmos/ rtc battery but that would have nothing to do with powering on your laptop. Most likely there is an issue in the circuit at the DC power jack. If the connection seems loose, or moving the plug at the point where it connects to the computer gives a glimmer of power then it is the jack. The DC jack is usually soldered to the motherboard and requires some knowledge to repair. If the jack is okay then there is a problem further up in the power circuit on the motherboard which means trouble.

This is what you power jack looks like and yours is not soldered, but has a 4 pin connector that plugs in to the motherboard. Much easier to replace than a soldered connection. Click HERE to see it.

P.S. Just because there is a green light on the adapter it doesn't mean power is being distributed to the connector tip. You may want to try a different adapter before spending money to have it diagnosed.

Apr 18, 2011 | Acer Aspire 5920-6727 Notebook

1 Answer

There is a bad connection between the power cord and the port into which it fits. this bad connect has lasted for weeks. i've been able to jiggle the cord and situate it so their is a connection. but, now...


The port on the laptop where the AC adapter, (Charger to some), plugs into is the DC Power Jack.
(Or DC-in )

This is an example of an aftermarket manufacturers offering for a DC Power jack, that fits an Acer Aspire 4520 Series Notebook, (Laptop),

http://www.laptopjacks.com/view_part/Acer-Laptop-DC-Power-Jack-AC91316.html

Click on the photo of the jack, showing three views of it. This will enlarge for better detail.

As you probably know computers use DC voltage.
Your laptop battery, and a flashlight battery are examples of stored DC electricity.

Looking at all three views, the middle pin of the jack is for the Positive connection. Down inside the round opening on the side, is a strip of metal. One on each side. These are for the Negative connection.

Looking at the jack in all three views, you will note a flat pin, or Prong, that comes up in the middle, and at the back of the jack.
You will note that it is riveted to the center pin, or Positive connection.

The two flat pins, (Or Prongs), immediately on either side of the middle flat pin, are for the Negative connection. They connect to the strips of metal inside the round jack opening.

In relation to how the jack sits inside the laptop, the jack is upside down. The flat pins go down through the motherboard, and are soldered to the motherboard on the other side.

1.The body of the DC Power Jack is made of a type of Phenolic plastic. Hard, and has great insulating qualities.

It is also easily broken.
If you can move the center pin around, this is what has happened. (Battery REMOVED!)

Solution is to replace the DC Power Jack.

2.Where the flat pins go through the motherboard, and are soldered, is called a Solder Joint. The area where the flat pin meets the motherboard, and solder is applied.

One, or more solder joints can crack.
This gives you an intermittent connection, such as you have described.

Solution is to re-solder the solder joint/s.

3.There are also laptops that have a bad motherboard design.
The DC Power Jack is placed on an area of the motherboard, that is weak.

If you think of a 1 foot square sheet of plastic, as being the main body of the motherboard, and attach a 2 inch strip to the main body, this is the area shape that I'm referring to.

The 2 inch strip can crack, where it meets the main body.
Motherboards have Circuit Traces. Think of them as Very, Flat, Thin, copper wires.
Circuit traces go across the main body of the motherboard, and lead to the 2 inch strip. If this 2 inch strip cracks away from the main body of the motherboard, the circuit traces break.

If you move the AC adapter plug while in the DC Power Jack, you may be able to make the broken circuit traces touch each other, making a connection.
Eventually this fails to work.

Solution is to replace the motherboard. With this type of bad design the problem will reoccur.

This link is for the Acer Aspire 4520 Service Manual.
It is free.

http://www.tim.id.au/blog/tims-laptop-service-manuals/#toc-acer

As you can see there are many service manuals listed for Acers.
Scroll down with your eyes to the second Aspire listing. (Starts with 1200, 1300, 1310, 1350, and so on)
Scroll across the third line down, until you come to - 4520
Click right on 4520

This is a PDF file download. After you click on 4520, you may not see anything happening for a few seconds. The file is downloading in the background.

Advise letting the file download all the way, before looking through it. You might break the download connection.

If you wish to save a copy to your computer, go up to the top header, and click on the Floppy Disk icon.
This is the second icon from the left.

If you hover your mouse cursor over the icon, it will briefly reveal, 'Click to save this to your computer or another location'

After you click on the icon a small window comes up.
Save a copy...
Down in the Save a copy box you will see -
File name:

In the box to the right of File name, you will see -
aspire 4520 1220 4520g 4220g

Advise put your mouse cursor right after the g in 4220g, Left-click Twice, then make one space with your space bar.
Now type - Service Manual

Makes it much easier to find.
If you save it to your computer, you won't have to download it again. You can also burn it off to CD disk, and free up space on your harddrive.

I haven't worked on the Acer Aspire 4520 series yet.
The DC-in jack, (DC Power Jack) is on the Right side at the rear. (Page 17)

Looking at the Board Layout, Top View, on Page 12, you can see the DC Power Jack.

Come down below the 1 with the red small rectangle. Look straight to the left of the Half Moon hole, with the two top corners cut off. The DC Power Jackis on near the edge of the motherboard. (Board)

(You can click on the + sign in the top header, to zoom in)

On Page 13 you're looking at the Bottom view of the motherboard. (Board)
The little silvery dots are solder joints.

Your motherboard design does not follow Item 3,
I listed above.
You have a broken DC Power Jack, or cracked solder joints.


Dec 08, 2009 | Acer Aspire 4520-5582 Notebook

2 Answers

Charger is no longer working


Oh, believe it or not. My computer use to do the same thing all the time. Just take the prongs on the plugin and bend them outwards slowly. This will make a tighter fit in the outlet.

Jun 11, 2009 | Acer Aspire 7720-4428 Notebook PC

1 Answer

Laptop Power


Not the charger. It is either the battery or the charge circuit in the laptop. Most are on the mother boards but some have a changable dc to dc inverter board

May 13, 2008 | Acer Aspire 5100 Notebook

2 Answers

DC power input center pin is gone


Part costs about $ 5-10 bucks.....labor to fix it ranges from $ 100 - $250. Problem is caused by jerking or tugging on the power cable too much. All laptops need a Cable Retention Device like the one in this video. . .

Jan 05, 2008 | Acer Aspire 3610 Notebook

1 Answer

Acer Aspire 1360 d/c input port


I have the exact same problem, the dc jack port pin as come off of the motherboard circut..so I do not know where to even try to solder it. I hate their input jacks, the laptop, a Acer aspire 5570, is only 6 months old, and useless, because i cannot charge the battery or use the charger directly. What a poor design, designed to wear out. So I just end up buying a stand alone external battery charger online from www.portatechs.com at least i will be able to charge the battery and put it in the laptop

Nov 29, 2007 | Computers & Internet

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