It is not the first time I've dismantled something but it's the first time I'm sharing it in Instructables. This Samsung charger is currently in use, so I resisted my temptation to completely rip off the case, wire and the connector. It doesn't have any screws, so I had a hard time opening it. But I would recommend all enthusiasts to be more cautious and more tidier, 'cause now my charger looks ugly and kinda distorted. Also, avoid any scratches while opening the case using sharp objects.
Preferably, use an old charger or the one not in use because, believe me, your charger won't look the same as the one you started with!
Step 1: Tools Needed
Some of you may have charger with screws, so you would need an appropriate screw driver first. But my charger is a continuous plastic case, so I just used:-
1). Paper cutter
2). Candle (or something to heat up)
Step 2: Opening the Case
If you observe the picture, you'll find the seal of the outer case of charger. Now the problem with devices of good companies is that the material used is excellent! The plastic is thick layered, unbreakable. I really had a tough time with it.
First of all, heat up your cutter and run it along the seal. You may have to do this quite a number of times. Do it till it gets shaped out.
The area attached to cable (marked in square) is now more vulnerable to incisions. so, use your forceps(or anything sharp) to make a deep dent in order to cut the seal. But be sure not to damage any internal parts or the cable itself.
If you leave your forceps as it is after making a dent without removing it, it would be easy to break the rest of the part. So, next, heat your cutter at degree to melt the plastic and start cutting the seal again.
This would be the final round. Take your time, be careful not to damage any internal parts. Also, there's a tiny wire running from the transformer to the cable of your charger. So be careful while making the dent near the cable.
Step 3: Parts Inside a Charger
1). Step-down Transformer
2) 6.8 micro farad capacitor- 4
3). 10 micro farad capacitor- 1
4). 330 micro farad capacitor-1
5). ECIA7 diodes- 5
6). 1.2 milli henry inductor- 1
7). Fuse resistance
Step 4: Working Explained
A charger is nothing but a kind of SMPS (Switch Mode Power Supply). For more info on it visit: http://www.radio-electronics.com/info/power-manage...
An SMPS converts AC or DC (here AC) into a DC output basically by switching action. So, first of all the transformer steps down 230V AC supply to about 5V. The bridge rectifier circuit (4 diodes) gives a pulsating DC output. The LC combination filters the output and the 5th diode acts as a voltage regulator. The resultant output is fed to the terminals (i.e. prongs of the charger).
The fuse resistance is provided for safety. The blue capacitor i.e. 10 micro farad capacitor is used to reduce electromagnetic interference. What happens is, during switching, the noise interferes with a newly generated ripple causing electromagnetic interference, which decreases the performance of the circuit.
I always wanted to learn complete functionality of all the components of whatever device I dismantle (ok, I know, I didn't dismantle it completely..), but it's a little discouraging to still have a few things of which I have no idea about. So, I welcome suggestions on improving my content and would love to have more knowledge on it.