Steps to repair IBM 92P1160 ac adapter

My wife's IBM Notebook uses a power adapter that has an output voltage of 16V at 4.5A current

. One day the adapter stopped working.

I Decided to try to repair the adapter. In the past I repaired several switching power supplies of PCs and also one AC-power adapter of a Asus notebook. I found out that most of the supplies had similar defects. Often they are ease to locate and to repair.

This Instructable shows how to repair a IBM Notebook AC-Adapter but using the same principles it can work with any switching power supply.

1?Things needed AND SAFETY

First of all you need the defective power supply, Then you need a screw driver. It could be phillips type or a flat blade type, depending on the power supply.In case of the IBM Notebook adapter you need a Dremel tool and a cutting disc too.To find out the dead parts you need a multimeter that contain...

2?Opening the case

The IBM Notebook AC Adapter (IBM 92P1160 ac adapter) is not meant to be opened. The case is made of two plastic frames pressed together and melted at the contact to one piece. To take it apart you need to cut the two halfes using a Dremel tool and a cutting disc. WAIT SOME MINUTES AFTER PULLING THE POWER CHORD FOR THE CAPACITORS...

3?Examining and understanding

Start locating the parts of the power supply. We concentrate only on a few parts. I often found out that these are the most critical parts. Most swicth mode power supplies die when being switched on. At that moment a high current flows on the primary power side. You can see that if you plug in th...

4?The Fuse

Start with the fuse. Turn you multimeter to diode test (continuity test) and put the test cables on both ends of the fuse. The multimeter should "beep" and show a very low voltage (IBM 92P1160 ac adapter). If that is the case the fuse is ok and need not be replaced. Otherwise you have to desolder the...

5?The Rectifier

Next part in the chain is the rectifier. In nearly all cases I saw til today there is a full bridge rectifier used. Here it is a flat one located near the power connector. Again use the diode test for measurement. From underneath the printed circuit board you can reach the rectifiers contacts ea...

6?The Capacitor

Now use our Multimeter in diode mode to find out if the capacitor works. Place the measuring pins on the pins of the capacitor and look at the display while doing that. As soon as you place the pins the display shows 0V. Then the voltage in the display starts growing and the display shows infini...

7?Repairing

After we found out what went wrong we can repair the power supply. If the capacitor is broken, desolder and replace it. I tried to find out if this was the only defect part and decided to do further testing before trying to buy a replacement. I did not have the capacitor that was used in the pow.

Steps to repair IBM 92P1160 ac adapter

By: wangqi

POST COMMENT

Asus X58 Laptop: Switch on to New Windows & Get It Free With Phone Deals How to repair Dell MK911 ac adapter How to Repair Corrupted PST in Account using IMAP Casement Windows: Totally State Of The Art Microsoft Windows: How it All Began A Condensed Guide To Repairing And Preventing Scratches On Your Vehicle Windows Installer Errors - What Is The Best Thing To Do When You Have One Why Should You Choose A Windows Vps Hosting? Does Georgia Allow Septic Repair in Rockdale County? Be Careful If You Choose To Repair Your Own Leaking Roof What Is The Real Cost Of An Air Conditioning Repair Service? Windows 7 And Laptop Battery Life Recover windows 7 password with reset disk