Mac Keyboard Inlet Maintenance method

Apart, found inside than the ordinary PC keyboard structure to be simple. In addition to the key and the corresponding soft plastic buttons below, there is a plate (this should know why the keyboard so heavy), the iron plate has countless screws, one twist open, you can see the circuit board. In fact, this circuit board is very simple, up and down two layers, go not the same. I can see, the next layer of the circuit board, the water has been black. In fact, the simplest way is to the black part of the two sides above a layer of green film scraping off, exposing copper electric line. Then find a wire, want that a lot of filaments, the inside of the copper core out, with that very thin copper wire, connecting the two parts of the electric line, and then with Scotch tape glued to both sides, pay attention to the middle part do not stick. This is basically OK, then install, you can use.

In the keyboard where the USB line, there is a circuit board, which is the most important part, if your keyboard this part of the damage, then do not repair. But note that this part is generally not bad, it is like a computer motherboard.

After you remove the keyboard, see three layer of film, you can find the upper layer and the next layer of the circuit, the middle layer is a simple film, but dug some holes, this layer is only for the upper and lower two insulation effect better. When you press the button, it is the metal dot that corresponds to the top layer key through the circular hole on the middle layer, and the bottom layer of the corresponding metal point of contact, forming a loop, and then the current to convey the first paragraph of the mentioned circuit board, the circuit board to the computer to transmit the corresponding signal. (Ordinary PC keyboard principle is not the same, that is in a layer of circuit board, each key corresponds to a point, this point is divided into two circles, the key press, the inner ring and the outer ring of metal through the key under the conductive contact connected to form the return of electrical signals)

Look carefully at the next two layers of film, in fact, in that line, covered with a layer of green (may be green, my impression) thin film, only in each key corresponding to empty a dot, this dot is exposed to the outside metal contact point, the "flower" key, is only to expand contact area. The top layer of green film is used to fix the line, the inside actually walk is also metal.

In other words, the upper and lower layers of the film in a complex line, there is a current through. And this one line, it looks very wide, but in fact very thin (think, that layer of film is just how thick). If there is water or other liquid material inflow, because the conductive, will burn out the line, that is, the thin layer of the line to burn. My keyboard is damaged, that is, the water into the bottom layer of the film on the metal line burned out, the place without metal, it will not pass.

You first determine which keys are not used, and then look at, on the next two films which layer of film is damaged, usually a point of bad, will affect that layer of the back end of a few keys, generally will not appear a few points are burned out of the situation. Then scrape open the area on both sides of the layer of green film, pay attention to, can not be too heavy, otherwise scraping through can not be used.

In fact, you just have to use that very fine wire to connect this burnt place on both sides of the metal line, with Scotch tape on it.

　　Note:

Because some of the damage occurs on a key, you must ensure that the wire passes through the dot corresponding to that key. Otherwise, press down, the top layer of film and the following layer of the contact point of the film is not contact, this key is still not available.