Apr 23, 2020 Apple 45 Watt Magsafe 2 Power Adapter Repair – 14.5 Volt 3 Amp. During this Corona Lockdown period it becomes very painful if any equipment fails as you cannot get its replacement or get it repaired. Same thing happened with one of my colleague. His Apple Magsafe 2 power adapter failed and he could not get any support from anywhere. Repair your broken Apple MgSafe power adapter cord for MacBook and MacBook Pro by yourself at home and save up to $100. Just order a replacement cable from e.
I have two iBook G4's and we share power supplies around the house. As is common, the connector (jack) that plugs into the computer was damaged on one of the power adapters. The strain relief wore out and a wire fatigued inside the connector. With some prior experience and a little help from the internet, I was able to repair it!
I was not able to find all of the info I wanted to safely disassemble and reassemble the connector, so I am adding the details I learned in the process.
First the info that I found helpful & interesting:
1) Repair your macintosh power cord @ http://www.instructables.com/id/Repair-your-macintosh-power-cord/
This post was the most helpful! This guy gives some good pictures. But I think it is a mistake to 'discard the short section and the strain relief.' His comment at the end about the jacket snapping back in place, gave me the clue I needed to take my connector apart without cutting or other damage (thanks dude).
2) Mac iBook G4 Power Adapter DC Plug Repair Howto Guide @ http://repair4laptop.org/contrib/appleibook/ibook_charger_plugrepair.html
This one addresses a different problem than mine, but is interesting.
I did not have to cut the white jacket off as he did. (see below)
3) Apple Ibook Laptop Power Jack Repair by on CALL 25/8 @ http://www.youtube.com/watch?v=u1R2emcIsEs
This is an interesting iBook disassembly video with cool music. The soldering skills demonstrated in this video are a little more advanced than those needed to make the repair I performed.
A moderate amount of skill is needed to perform this repair. You need a sharp hobby knife, soldering iron, heat shrink tube, and a hot glue gun. If you have soldered electronics before, you can do this.
Anyway, the things I wanted to know, but could not find were:
1) The white jacket on the connector can be pried off by gently working a hobby knife between the jacket and the light ring. Keep rotating the connector and working in the knife. Eventually you will be able to twist the blade between the two sides and slip the white jacket off the connector.
2) Inside the jacket you will see the strain relief is molded on the end of the cable with two leads emerging. What you don't see is the ferrite bead inside the molded strain relief!
You really don't want to lose that ferrite bead because it suppresses noise that might come in on the power cable. Your iBook will thank you for preserving it.
I cut open the strain relief and pulled the wires out of the bead. When reassembling, I reused the bead and the strain relief.
3) The cable is of coaxial construction with an insulated wire running down the center and shielding braided around the insulated wire. The shielding wires are very fine and are damaged easily. In Apple's construction, the braid is drawn into a wire and used as the second lead on the connector.
In the case of my damaged connector, it was the braid that gave way after the strain relief failed. The symptom of this was having to jiggle the cable into just the right position to complete the circuit. After a while, no amount of jiggling would work.
4) A few more details..
I cut the sheath back an extra amount so that I could harvest some of the center wire and attach it to the braid. This allowed me to have two decent wires to fish thru the bead and solder to the connector.
The heat shrink tubing was used to cover the solder connection between the braid and the harvested wire. It was also used as the base layer of my new strain relief.
The original strain relief had to be hollowed out to get the bead back in, and it was shortened a little to fit back into the white jacket.
The hot glue gun was used to finish the strain relief after everything was reassembled.
Don't forget to test your work after your soldering is done, but before you reassemble the strain relief and white jacket.
I hope this extra info is helpful to anyone trying to repair the connector on their iBook power adapter.
iMac 2GHz Intel Core Duo, Mac OS X (10.6.2), + some older iBooks
Posted on Jan 2, 2010 5:55 PM
Apple 45 Watt Magsafe 2 Power Adapter Repair – 14.5 Volt 3 Amp
During this Corona Lockdown period it becomes very painful if any equipment fails as you cannot get its replacement or get it repaired.
Same thing happened with one of my colleague. His Apple Magsafe 2 power adapter failed and he could not get any support from anywhere. Since he lives just in the next building and he knows that I do sometime repair work for my own personal equipment’s, he requested me to look into his power adapter.
I assured him that I will do the repair for him but it may take some time as spare parts may be the issue. After he left I took the adapter to my work bench and checked the power on adapter cable connector. The connector pinout is given above. On check I found that voltage is fluctuating between 8 to 11 Volts.
Now I was sure that problem is in the adapter only not in the cable or connector. Since I was opening Apple adapter first time, it took some time for me to understand, how to open it. After dismantling the adapter removed the shielding plate.
Checked the voltage at output point, it was fluctuating. Removed and checked the Rectifier Diode MBR 20100 and filter capacitors. All were OK. I checked all the other SMD components of output section with Multi meter and Component tester. All were fine and readings were within limit. I checked the feedback section of Primary Section by checking voltages on pin no. 3 and 4 of photocoupler EL357N. These were also fluctuating.
To further confirm whether the problem is with primary section or output section, I used supplementation method by using another 12 Volt 3 Amps adapter. I connected the primary section of the Apple adapter to the secondary section of the 12 Volt 3 Amp Adapter using the 817 C photocoupler. I also replaced the 22 mf 50 Volt capacitor.
When I checked the output voltage it was stable and 14.5 volts. I realized that the problem was with the Photo coupler EL357N. Replaced the 817C and also to be at the safe side I replaced all the electrolyte capacitor of output section.
After this I checked the output voltage it was stable 14.5 Volts. Connected back the cable and assembled back the adapter and checked the voltage at connector. Iraq wc 2018 qualifiers kits empty spaces the blog ideas. It was stable and with in limit.
Mission accomplished. Thanks & Regards
The author is a Telecom engineer and electronic enthusiast with more than 35 years of experience in Telecom / Broadcasting industry. He is residing in Delhi, India.
Apple Iphone Adapter Repair
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