Replacing glass on a smartphone on your own: description, recommendations and requirements. How to remove a broken touchscreen from a phone. How to change the touch screen on a tablet. Using the Acer Iconia B1 as an example. Is it possible to change the touchscreen without disassembling the phone?

08.11.2021

How to remove the touchscreen?

The touchscreen of a smartphone, that is, its touch screen, may suddenly stop working. In this case, you can’t think of anything else other than replacing it. It is known that you can order a touchscreen at a relatively low price, but replacing it can be quite expensive. Therefore, in this article we will look at how to remove the touchscreen yourself.

Removing the touchscreen

With the so-called block repair Removing the touchscreen is one of the most difficult steps. Moreover, for each smartphone model, how to disable the touchscreen and remove it will have individual characteristics. We will only give a general diagram without detailed description disconnecting loops, cables, etc.

To carry out dismantling, you will need a special device that resembles a screwdriver, but instead of a metal slot, it is equipped with a plastic one. Sometimes specialists use some kind of scalpel.

First you need to pry off the touchscreen, separating it from the frame. This is not at all easy to do; it requires not only accuracy, but also precision.
Then the touchscreen is warmed up with a hairdryer to make it easier to remove. It should not become hot during this process.
After this, specialists use a thin but dense plastic film to insert it into the gap and begin to remove the layer of glue. The specialist lubricates the film with a special solvent so that it gets on the glue and corrodes it.
So you need to walk around the entire perimeter of the touchscreen and eventually carefully remove it.

As you understand, this process is quite complex, so you should still contact specialists, but if you are quite confident in yourself, then instead of film you can use a plastic card, for example, an expired credit card. Solvents can be purchased at a specialized retail store. computer equipment and accessories.

Good day everyone (evening, morning - or whatever is outside your window right now...). Finally got my hands on this creation. I know, I promised a month ago. But vacation, heat... You also understand me. We are all humans! Well, if you kick, then please don’t kick too painfully!

So let's get started. If your device has stopped responding to touching the sensor, if this very touch leads to completely unexpected consequences, if the phone freezes at the touchscreen calibration stage, if there is a gorgeous crack on the sensor glass, then it’s time to change the sensor. Of course, you can go to the nearest service center, where for 500... 2000 of your hard earned money they will offer to revive the device... Well, this option is also being considered. Well, for those who like to do handicrafts, I offer an option on how to get by with just two hundred rubles and replace the sensor yourself. And I’ll try to tell you how to do this.
To be certain, we will change the sensor on the Chinese iPhone 3GS 32Gb. Thanks to the admin of this site, I had a lot of time to mock this device to my heart's content! And when the client does not stand above his soul, it is more pleasant to work!

This is what today's guinea pig looks like... or rather, a baby whale:

If you look at the device from the bottom end, two small bolts will be hidden next to the system connector. These are:

Task number one: these same bolts need to be unscrewed. Happened? Hurray, half the job is done! We move the top cover of the device about five millimeters up (now it is not held in place by anything - so it should go easily):

Sorry for the photo quality - it's not very visible; however, it can be taken apart. And after the lid is slightly moved up, it can be easily and without problems removed. And this picture appears to our eyes:

If anyone doesn’t understand, this is the top cover of the device, only a view from the inside. But at this stage we are more concerned with the view from the outside. I didn’t take pictures (my camera still won’t take the photos as needed), I’ll try to explain in words. If you look at this cover from the outside, then if you look closely, you will notice that something like a thick and dense film is glued to the metal from which the cover is made. This film is the sensor. In the center of the touch screen, glass is glued to the film (it sometimes breaks!), and the edges of the sensor are attached to the cover, making the entire structure quite durable. And the sensor is glued to something like double-sided tape, so you can tear it off from the lid using an ordinary knife. Special stops are made for glass in the metal lid. This is what the sensor looks like, separated from the cover:

In principle, as you might guess, the new sensor looks exactly the same. Only on the new one the double-sided tape is already glued. And this is what the lid looks like without the sensor:

Do you see those small rounded stops in the corners of the sensor holes? This is where the glass falls. We wash off the remnants of the old glue from the body (with alcohol, acetone...), remove the protective film from the new sensor (for now - it’s better only from the bottom surface!) and carefully glue it in place of the old one. There is only one subtlety here: so that the leads of the new sensor fall exactly in the same place where the old ones were located:

For greater clarity, I have circled these same conclusions in red. To make sure everything turns out fine, I would advise, before tearing off the old sensor, to circle this very flexible plate with leads with a felt-tip pen, and when installing a new one, glue the plate to the same place.
Next, put the cover in place, tighten the bolts, and turn on the device. All! Congratulations, you just saved a ton of money and repaired your expensive (or not so expensive) kit! How long did it take? Twenty minutes, no more. How much do they charge for this at the SC? Have you respected yourself? :)

But, unfortunately, everything is not as simple as it seems. There are plenty of pitfalls here too. And you are destined to encounter the biggest pebble even before you begin to disassemble your device. The fact is that there are a great many Chinese devices in Mother Rus', and devices that look exactly the same in reality turn out to be not even twin brothers, but rather distant relatives... with completely different touchscreens. What to do? How to find a sensor suitable for your device? According to the name of the phone - 99% of the time it doesn’t work out... To answer this question - first allow a little boring theory. So to speak, for general understanding.

In fact, there are several types of sensors in terms of design and operating principle: resistive, capacitive, surfactant (based on surface acoustic waves)... Maybe there are more, I’ll remember and add. So, in relation to Chinese phones, specifying the type of sensor is not relevant; the fact is that they are all resistive! It must be said that this type of sensor is the simplest and cheapest, apparently, this is the reason for the choice of the Chinese (by the way, these sensors also have the lowest resolution). It’s worth saying here that “white” Apple iPhones have capacitive sensors, so they are not suitable for the “Chinese”. I’ll try to explain in a nutshell the operating principle of these same resistive sensors. Forgive me, but here you can’t do without the simplest terms from radio electronics, so if it’s not clear, ask again.
The sensor consists of two films glued together. These films have the property of changing their resistance depending on the point of mechanical pressure. Moreover, one of the films changes resistance when the touch point is moved horizontally, and the other - if the touch point is moved vertically. Thus, knowing the initial resistance of the films and their resistance upon contact, we obtain two contact coordinates: one is “horizontal”, and the other is “vertical”. Next, the resistance of the films is converted using an ADC (analog-to-digital converter) into a digital code, which the processor “understands” and calculates... The equivalent circuit of a resistive sensor looks something like this:

If you are interested, next time I will describe in detail the principle of operation; Now all that matters to us is that ALL sensors for Chinese devices are designed this way. Well, for reference, I’ll also say that the resistance of the sensors (equivalent resistors in the diagram) should be within 300...1000 Ohms. Well, maybe plus/minus a little from this range. A strong difference indicates that the sensor needs to be changed.
And now, actually, why am I telling all this? The fact is that sometimes it is simply impossible to find a sensor that absolutely matches the characteristics of the original; but there is an analogue of suitable size with a different location/shape of the pins. This is especially true for Chinese phones. Then I would advise you to do the following. We take a sensor that is suitable in size and, using a tester, “call out” the conclusions, focusing on the equivalent circuit drawn above. Finding the pins corresponding to two “resistors” is as easy as shelling pears, and which of the “resistors” is horizontal and which is vertical can be done by touching the sensor in different places and monitoring the change in resistance. Then we do the same with the old sensor. Of course, provided that this sensor still shows at least some signs of life. And then - it all depends on your imagination. You can simply solder the sensor pins to the corresponding contacts on the board using thin wires (unscientific, unsportsmanlike, but it will work). Or you can do as I did. In my case, the outputs of the new sensor are a flexible ribbon cable with four conductors sealed into it; The length of this train is about 50 mm. You’ve already seen what the contacts of the old sensor look like in the photo above (circled in red). So, I carefully tore off the plate with contacts from the old sensor, glued it directly to the cover in the very place where it should be, and then, using thin insulated wires, connected the corresponding contact pads on the contact plate and the new sensor. Then, for mechanical strength, I filled the connecting wires and my entire structure with glue (of course, the contact pads must remain clean!). It is worth saying that the use of glue in this case is quite acceptable, since the resistance of the working sensor is in the region of one kOhm and the glue will not bypass anything. And in all other cases, when using SMD installation, the use of any household glue is NOT ACCEPTABLE! Here's what I got:

Yes, I don’t argue: it’s not too beautiful and quite troublesome; but look at it from the other side (I mean, look at the lid from the outside!): nothing is noticeable! The beauty was not damaged at all! As for “troublesome” - think for yourself: either wait until (maybe!) a sensor appears in the service center (in a store, on the market, at Uncle Vasya’s...) that is ideal for you, or for 150 rubles buy the one that is in available, spend an evening on it and enjoy the working apparatus!
If you decide to simply solder wires to the contacts on the phone, then this is what these same contacts look like (in my case):

I never tire of warning you: if you solder with an ordinary soldering iron, DO NOT FORGET ABOUT STATIC ELECTRICITY!!! Only by touching one of the pins with a soldering iron tip can you kill the device to the “dead processor” state! By the way, the option I proposed (with tearing off the old contact pad) practically eliminates damage to the phone from static!
One more small subtlety. Sensor resistors, as you might guess, have positive and negative terminals. No, it's not electrical plus and minus; From an electronics point of view, the touchscreen will work when connected to any polarity. But geometric “plus” and “minus” have their place! Let me explain. You can touch the sensor one centimeter from the right edge or one centimeter from the left. Accordingly, in the first case, for example, the resistance will be 500 Ohms, and in the second - 350 Ohms. The processor contains a completely unambiguous algorithm for the ratio of resistance to coordinate; for example - decreasing resistance from right to left and from top to bottom. And if you mix up the polarity of the connection, you will be able to notice this as soon as you turn on the device: when you touch any icon located at the bottom of the screen, one of the upper icons will be “triggered”. Or, you press the right icon, and the left one works. This phenomenon is not a sign of a non-working sensor; you just need to swap the wiring to the corresponding (horizontal or vertical) sensor.

And one more little tip: if possible, remove the protective films from the sensors only before assembling the phone. Fingerprints left on the inner surface of the sensor look very ugly and erase very poorly!
How to measure the sensor? When purchasing (ordering from an E-store, on the market...) you need to know the physical dimensions of the sensor. And to find out, you need to measure the old sensor. You need to measure the length and width of the sensor itself (film), and not the size of the top cover of the case! It is quite possible to carry out the measurement with an ordinary student ruler - the accuracy is quite enough; however, if you know how to use a caliper, then this will not hurt anyone! Although - I repeat: you need an accuracy of plus/minus half a millimeter. It would also be a good idea to measure the size of the glass glued to the sensor.
I immediately answer hundreds of the same type of questions that come in PM: you CANNOT cut the sensor film with scissors to achieve the desired size or shape!!! Maybe you will be lucky - such a “trimmed” sensor will work for a little bit... but more likely - that the next day you will go to the store for a new sensor!

And a few words about the main thing (old songs about the main thing, damn it!!!). Where to look for this very sensor? Well, for starters, the standard one: on the radio market. In Moscow it is Mitino (I buy there myself); in other cities - see for yourself, you know better. I know, I know: what to do if there are no markets? Or - if they exist, but there are only radio tubes for Record 336 TVs? Or something else... Then the answer will be no less original: online stores. But here the subtleties begin, which I would like to mention separately, so that you do not feel excruciatingly painful for wasted money... At the request of the administrator of this site, I tried to order a sensor in the E-store, that is, to put myself in the place of a simple user. The result of my little investigation is given below.

First of all, I want to reveal a great secret: the sensor costs 200...300 rubles! At least that's how it was at the time of writing. Accordingly, sites that offer to buy a sensor for 1300 rubles. - sweep aside immediately and irrevocably!!! At best, you will simply lose a thousand of your hard earned money; and in the worst case, you won’t see either money or sensor. Further. I advise you to do the following: type in Yandex (Google, Rambler...) a phrase with approximately the following content: “buy a touch screen for Chinese phone" Well, or something like this, play with words. Open about twenty store sites that have in stock the product you need (or a similar, similar) product, that is, a sensor. And then - look through all these sites for contacts with sellers. If you don’t find any, close this site and never return there! If there is an ICQ number, which when checked turns out to be “unavailable” - similarly: close this site! If the site only costs email address(no phone, no ICQ) - that's right, close it! As a result of these simple manipulations, you will still have about a dozen sites open, and this is good. But that's not all, don't rush to place an order. Contact the store managers and ask them... something that isn't too stupid. For example: “Is such and such a sensor covered with a protective film on one side or both?”; or: “Do you only have resistive sensors?” Well, in general - use your imagination. And wait for an answer. No more than 48 hours! If the manager is a professional and has at least a little respect for customers, then he will definitely answer you (although, perhaps, the answer will be no less stupid than the question! ?). All sites that did not bother to write an answer - close them! Believe me, in the end there will be only two or three stores filled with people who are at least a little involved in their business. Well, to choose one from three stores - I think you can handle it yourself. The decisive factor, for example, may be the geographic location of the store (closer to your home - the parcel will go faster). Or - the one that works with cash on delivery. For example, after all the above actions I settled on str-mobile ru. In my case, the manager turned out to be quite competent and “enlightened” me on the topic: “All our sensors come complete with glass, but without covers.” And the parcel arrived in 11 days. Although, in fairness, I note that during these 11 days I drove Mitino twice and could have bought this same sensor twice...

Well, actually, that’s all I would like to tell you about self-replacement sensor If you have any questions, write (in the comments to the article or on the forum), I will be happy to help. Good luck to everyone and hope the heat ends soon!

It is also called a “sensor”, “touchscreen” or simply “touch”. Many have encountered this problem, and everyone has wondered if it is possible to fix it on their own? In fact, it is easier than you think, you just need to have basic skills in working with a soldering iron and a little ingenuity.

In this article we will try to summarize the scattered information available on various forums and pages describing the technology for restoring touch screens electronic devices. We will also share our own experience in this area. In addition, a prerequisite is that your display must be resistive (fortunately, today they are the vast majority).

A little theory

The display consists of a glass panel and an appropriately sized plastic membrane. Both elements have a resistive coating. The principle of operation of the touchscreen is simple: at the point of contact, the resistance changes, the coordinates are read and transmitted to the device. 2 electrodes are connected to the membrane (+5V and ground), they read the coordinates according to the X and Y axes. Thus, our screen has only 4 wires.

Personal observations

In practice, it turns out that the screen size does not affect its operation in any way, that is, you can connect to the device a touch screen larger or smaller than the “native” display. It will be fully functional.
It is impossible to damage the touchscreen by incorrectly connecting the contacts! The most that can happen is incorrect positioning along the coordinate axes.

Touchscreen restoration process

Buy a touchscreen for a phone of the required size at any store that sells spare parts for mobile phones.
Let's disassemble the phone. disassembly of any model is easy to find on the Internet, we specifically need the display.
Open the cable clamp and pull it out of the phone body. On the back side we see foil glued to the display. You need to disconnect it very carefully, as there is a possibility of damage to the cable. Below it we see the place where all 4 wires of the cable are connected. The cable needs to be unsoldered.
Use a thin blade or screwdriver to remove the damaged glass from the display (it is glued in the same way as the foil).
Now we take the purchased spare part and carefully compare it with the dismantled one. We are interested in the location of the tracks. Even if the order is different, there is a universal marking. In case of difficulty, we also recommend turning to information from the Internet.
Solder the cable and assemble the device in reverse order.

When performing repairs yourself, you need to avoid getting dust inside the assembly, this will be visible later. For purging, you can use compressed, dried gas (it is sold in the same stores for repairing office equipment). When working, be sure to use gloves to avoid leaving fingerprints on the glass. The most important thing is to carefully study the data on the touchscreen sticker on the back side (products different manufacturers may be incompatible and cause damage motherboard devices).

DIY touchscreen replacement video

Below are video instructions for replacing the sensor on popular smartphones.

Do-it-yourself touchscreen replacement on iPhone 4s

Replacing the touchscreen with your own on Samsung Galaxy s3

DIY touchscreen replacement on Sony Xperia Z

Somehow it happened that the touchscreen on the Samsung Galaxy S phone III Mini the person dear to me was covered with a network of undecorative cracks. He took it to the workshop, they promised to do it quickly. The cost of repairs is 2500 thousand. But paying a third of its cost for phone repair is somehow stupid. So, I change the touch screen on my phone with my own hands.

I started by buying an original touchscreen at a telephone parts store for 560 rubles (I didn’t dare take the Chinese equivalent, although it was half the price).

1. We also need small screwdrivers: regular and Phillips; a sharp object like a knife, maybe a stationery one (I used a scalpel); medical gloves.

2. We disassemble the entire phone: remove the cover, take out the battery, SIM card, flash drive. Use a small Phillips screwdriver to unscrew the screws around the perimeter of the phone.

3. We admire the result.

4. Use a knife to pry off the phone cover from the end and separate the front wall from the back. We run a knife around the entire perimeter of the phone, disconnecting and removing the two parts of the phone from the latches.

5. Result.

6. Now we need to disconnect all the cables on the board. Carefully pry them off with a small screwdriver (as in the photo).

7. After the cables have been disconnected, we pry up and remove the board.

8. Unscrew the two bolts of the USB input and take it out. This will have to be done because it covers part of the touchscreen cable.

9. Next, work only with gloves so as not to leave fingerprints on the phone display. Otherwise, you will have to scrub them off with cotton swabs for a long time. We pry up (just as when disassembling the case) with a sharp object (preferably a blade) the edge of the touchscreen, and draw the blade along the entire perimeter. We move along the very edge so as not to scratch the plane of the phone screen. The touchscreen is glued to the body with adhesive tape.

10. We insert a new one in place of the cracked touchscreen, having first removed the protective film from the adhesive base. We reassemble in the reverse order, not forgetting to connect all the cables. The work is done, all that remains is to think about what to spend the saved money on.

The thing is fragile, and very important. You can say in the style of “Captain Obvious” that if it is damaged, the phone becomes impossible to use, but people are more interested in something else: is it possible to replace the screen on the phone yourself? Considering that the service center usually charges at least 1000 hryvnia for this procedure (even for a budget device), the issue of saving becomes acute. We’ll try to find out the intricacies of the replacement below.

Theoretical part

Any material should begin to be processed with theory. If you came here from a search engine by entering the query “how to replace the screen on your phone with your own hands,” new knowledge definitely won’t hurt. If the purpose of reading the material is to obtain some new information, in addition to what was learned earlier, this subheading may not be studied.

The touch display of a modern smartphone is a complex device consisting of several functional elements. The main ones are the matrix and the touchscreen; there may also be frames, keys, backlight elements and, of course, cables, in quantities from 1 to 3-4 pieces.

Matrix- a liquid crystal or LED panel on which an array of pixels is placed that form the image. On the front side it is covered with a very thin layer of glass, on the rear it has a stainless steel case. It is also equipped with a cable for connecting to the board, and may have other small elements on it.

Touchscreen (sensor)- a transparent glass touch panel that covers the entire front of the smartphone. It is a thin sheet of glass (less commonly, plastic), on which a transparent layer of conductive material is applied on the inside, and an oleophobic coating on the outside (optional).

In some cases (lately - more and more often) the touchscreen and the smartphone matrix represent one whole. They are supplied as a single module and are replaced together. This design is called OGS.

OGS screen(from the English one glass solution - solution with one glass) - this type of smartphone screen in which the sensor and matrix are connected together in the form of a “sandwich”. A distinctive feature of OGS matrices is a very thin layer of coating that protects the pixels, since the main element of their protection is the sensor.

Whether it is possible to replace the phone screen yourself depends on the reader’s ability to work with tools and the type of matrix. Some smartphones can be repaired very well at home, but not even every repair shop technician can handle others. We will discuss below which screens can be replaced even without experience, and which ones are best left to a specialist.

How to replace the glass on your phone screen yourself

The touchscreen of a smartphone is the first to take a hit when dropped, so it suffers more often than the matrix. Therefore, the number of calls to the service center caused by glass damage is greater than the number of cases of a broken matrix. However, this is not always reassuring, since replacing one touchscreen is sometimes more expensive than replacing the entire module. This situation is caused precisely by the use of OGS screens.

To divide the OGS display into a touchscreen and a matrix, to replace a damaged sensor, you can get by simple tools(suction cup, screwdrivers, knife, pick) will not work. Replacing the sensor on the OGS screen under SC conditions occurs approximately in this order:

Disassembling the phone.
Removing the module from the smartphone case.
Fixing and warming up the screen on a special stand.
Separation of the matrix and touchscreen with a special thin nylon thread.
Cleaning the matrix from glue.
Placing the matrix in a special stencil, applying photopolymer transparent glue.
Installing a touch screen into the stencil, removing excess glue between it and the matrix.
Irradiation of gluing with a UV lamp to polymerize the glue.
Installing the module into the housing.
Assembling a smartphone.

As you can see, without special equipment (a heating stand, stencils, transparent photopolymer and a UV lamp), you will not be able to replace the glass on the OGS screen yourself. Unfortunately, such screens are now installed in most Samsung smartphones, LG, Sony, Xiaomi, Meizu and, in general, almost all devices more expensive than 3000 UAH. Apple has been using OGS displays since iPhone models 4S. Therefore, independent attempts to change the sensor (without a matrix) on these devices are justified only if you have a lot of time, a desire to learn, and if you don’t mind the phone.

In the video you can see how an experienced person changes the sensor on an OGS display using a minimum of tools:

For the desperate: how to replace the glass on an OGS screen yourself

If your budget is limited and you don’t want to overpay again for a damaged matrix, this section is worth reading for general information only. It’s better to immediately purchase an assembled OGS screen module and not take risks. The editors are not responsible for broken screens, torn cables and other consequences of unsuccessful experiments.

Owners of some flagship smartphones(HTC One M series, Samsung Galaxy, released after 2015, and not only) independent intervention is contraindicated. Disassemble them without experience, without damaging the body parts, impossible.

For disassembly you will need the following tools and supplies:

Set of shaped screwdrivers(cross and star), for disassembling a smartphone.
Plastic card or mediator, spatula.
Hairdryer, capable of heating the screen to a temperature of 70-90 degrees (an ordinary one for hair is suitable).
Thin nylon thread or string to separate the module.
Gloves(workers and medical).
Rubber suction cup with ring.
Metal flat surface with holes(perforated sheet).
6-8 bolts with nuts(diameter depends on the diameter of the holes in the sheet, length - 2-3 cm).
Photopolymer glue, hardening under the influence of UV radiation.
Transparent atmospheric curing adhesive(eg B-7000).
Ultraviolet lamp(you can use a regular carrier with an E27 UV lamp, or you can take a manicure UV camera for nail extensions).
Windshield cleaner, alcohol, wipes.

Screwdrivers, picks, paddles and a suction cup are often included with the new touchscreen as a bonus. You can use them for replacement.

To replace the glass on a phone with an OGS screen yourself, the procedure is as follows:

The most common problem owners face cell phones- broken glass.

Phones often fall; glass, being the most fragile part, breaks first. It would seem that there is no problem going to replace the glass on your phone, but in practice everything turns out to be not so simple.

Previously, the glass on the phone was replaced separately, and the glass cost a penny. They are still inexpensive, but with the advent of the era of touchscreen phones, the procedure for replacing glass has become significantly more complicated. What is the current price for replacing glass on a phone, taking into account labor?

If you have a touchscreen phone and its glass is broken and requires replacement, then you need to know the following:

Modern touchscreen phones come in two types: those phones in which the sensor is connected to glass, accordingly changing the glass, you change the sensor, and the cost of touchscreen glasses is already much higher, since in addition to the glass itself, there is also a touch panel with a cable that has a connector to the phone's motherboard. Still, replacing the touch glass is not as expensive as the cost of replacing the glass itself on more expensive models.

The most advanced phone models, company flagships, such as Iphone 4, Iphone 5, Samsung Galaxy S3, Galaxy S4, HTC One Nokia Lumia 920 Sony Xperia Z and others have a more complex screen design: the phone screen consists of LCD display, which actually transmits the image, a sensor (touchscreen) responsible for pressing, and glass, which is protective and decorative. In this case, the screen module is one-piece, the components are glued together industrially, and according to the manufacturer’s instructions, the entire screen can be replaced.

However, the glass can still be replaced. The procedure for replacing glass on top-model phones is as follows: the display module is heated using a special hair dryer, the glue with which the glass is glued to the sensor is softened, then the glass is removed using a knife, a thin spatula, a plastic playing card, special molybdenum wire and similar devices. from the screen. Then the remaining glue is removed using a special solvent, a scraper, napkins, soft cloth, etc. The new glass is placed either with double-sided tape or with a special UV glue (similar to the factory one).

In the description it looks quite simple, but in practice everything is far from so. Firstly, it is extremely difficult to achieve uniform heating of the surface of the display module; there is a danger of overheating the display and sensor, after which either the image will disappear or the sensor will not work correctly. This can appear either immediately or after some time.

Secondly, it is possible to remove the glass without problems only if there are one or two large cracks on the glass, but in the case when there is a web of small cracks on the glass, the glass will crumble, and the fragments can easily damage the sensor, as a result you will still have to replace it entire display module.

Thirdly, cleaning the sensor from glue is also not useful for the phone; the glue is removed with a scraper, cloth, etc., the impact on the sensor is quite serious, which can also lead to its failure.

And finally, in most cases, craftsmen install new glass on double-sided tape pasted around the perimeter of the screen; it is impossible to ensure a tight fit of the new glass; over time, dust will accumulate under it, and the tape itself may come off.

Not everyone knows how to put new glass on glue; it requires not only special glue, preferably German, but also an ultraviolet lamp (the principle of glue hardening is like in a dentist’s office when they put a photopolymer filling), and preferably special equipment for the display and glass to ensure 100 % accurate glass hit in its place.

The work of replacing glass takes up to three hours, it is extremely painstaking and requires a very highly qualified technician. At the same time, if something doesn’t work out, then the master is also responsible for it; it is impossible to explain something to most clients. No guarantees can be given for the successful outcome of the operation.

That is why most professional workshops will tell you that the glass cannot be replaced and will offer to replace the entire display module. Of course, you can find a technician or a service that will take care of this, but rest assured that the glasses there are changed in an amateur way, the probability of success is 50/50, the probability of further operation and preservation of the appearance of the phone is even lower.

What our service offers.

IN this moment touch smartphones have two types of designs - unibody, in which the body is made of one non-separable part, and the classic monoblock phone design, in which the body is divided into a front part and a back part with or without a battery compartment cover. Unlike ordinary smartphones with a touch screen, the front part of the case is often a non-separable module made of protective and touch glass glued to the display.

So let's start with the unibody phone Nokia Lumia 920.

The diagram in the figure is valid to one degree or another for most unibody smartphones.

Screen module. Often this is not a collapsible “pie” made of protective glass, a touch screen, an LCD or OLED display and some electronics on the back of the module. A striking example is . It also happens that this module is still collapsible like that of ;
Motherboard;
Probably the motherboard, speakers, microphones, connectors, etc.;
Battery;
Cables and body parts;
Unibody housing.

We take out memory cards, SIM cards and everything that we can get from the phone.

We twist the device in our hands and look for screws on the ends; they can be hidden under stickers and protective curtains. We twist everything we see.

We take a suction cup and stick it on the screen something like this.

We carefully try to lift the screen, if it doesn’t work, take a tool for disassembling the cases and try to lightly pry it in several places.

If the screen does not budge at all, it may be glued like that.

In this case, take a hairdryer and warm up the screen.

Then, using a housing disassembling tool, carefully pry off the screen.

The screen module may be daisy-chained to other phone components, please proceed with caution.

You now have access to motherboard phone and battery. They are connected by cables, or soldered, like in .

The battery can be mounted in the housing or on the display module. Removing it is usually not difficult.

The motherboard can be screwed to the display module or to the chassis. It is usually secured with screws. Remove the screws and voila - the motherboard is free.

As I wrote above, the display module can be collapsible or non-collapsible. If it is collapsible, then most likely, unfortunately, it is glued with adhesive tape to the touch screen and glass. Use a hair dryer to thoroughly heat the adhesive tape and then you can try to separate the glued components.

How to disassemble a smartphone with a touch screen in a regular all-in-one case using the Nokia 5800 Xpress Music as an example

The diagram in the figure is valid for most touchscreen all-in-one smartphones.

Front part of the phone case;
Protective glass, touch screen and LCD matrix;
Screen backing;
Motherboard;
The back of the phone case;
Battery cover.

The whole thing is sorted out in this order.

We turn the phone so that the screen is facing away from us and remove the back cover, take out the battery if it is removable, take out memory cards, SIM cards, etc.

Remove all the screws you can see in the battery compartment. Inspect the phone from all sides, look for stickers or rubber seals under which screws may be hidden. Check if there are screws in the compartments that are closed with lids; if you find them, unscrew them.

Now you need to halve the phone body. To do this, insert the SRT-6 case dismantling tool or a credit card into the gap between the back and front of the case and run it around the perimeter of the phone, prying the latches that connect the parts of the case.

If the body is almost separated, but the halves are kept in one place, then there is no need to apply excessive force. Check for a screw in the area. See point 2.

Please note that parts of the case may be connected by cables, be careful and do not act abruptly. First, open the case a little and look inside. Usually the cable is located on one side, so parts of the case can be unfolded like a book and the cable can be disconnected without any problems.

Next we take out the motherboard. It can be mounted on the back of the case or on the front (on the display module) - depending on your luck. Unscrewing the motherboard is not difficult. Pay great attention to the cables that go from the motherboard to the peripheral components and display module. It is often necessary to first disconnect the connectors on one side of the motherboard, then lift it up and disconnect the remaining connectors.

Lots of daisy chain connections.

Now you can move on to the display. Most modern phones have a display module glued to the body; in addition, the touch glass is glued to the matrix. If some part of the display module is glued, you first need to heat the adhesive joint with a hairdryer. Then, if the gap between the elements allows, take several picks and stick them around the perimeter between the elements. If the gap is minimal, then it is better not to do this. Then take a tool for disassembling the cases and insert it under one of the edges, heat the edge with a hairdryer and lightly pry the glued part with the tool. The glue will give way and the edge will begin to peel off. Warm up and move the tool around the perimeter of the glued part.

At this stage, there is a high probability of damaging the touch screen or matrix.

Assembly is carried out in reverse order. It is best to clean all initially glued elements from the old adhesive base and glue them with new adhesive tape.

Unlike desktop computers, functions and programs in tablets are controlled by lightly pressing the fingertip on the screen at the desired point. The tablet reacts to touch thanks to a thin transparent glass plate superimposed on the display screen. When you press on the glass (touchscreen), depending on the type of sensors, the resistance, inductance or capacitance of the mesh applied to the glass changes and thus the tablet receives instructions for a specific action.

The touch glass is very thin, but strong enough to break with your finger. But if the tablet is dropped on a hard surface or hit with a sharp object, the touch screen cracks, which is what happened with the glass of the children's MonsterPad tablet shown in the photo.

Checking the tablet's functionality using the mouse

The image on the screen was uniform without defects or distortions. The tablet remained operational, because when you press the button turning on Power A window popped up with a menu to turn off the tablet, but it became impossible to control its operation by touching the screen with a finger.

For full check functionality of the tablet, and the ability to turn it off before repair, it was necessary to connect it to the connector Micro USB, located on the side of the tablet, mouse. Mice usually have a connector for USB connections. Therefore, I had to buy a USB-Micro-USB adapter.

When a mouse was connected, the tablet system automatically detected it, and an arrow-shaped mouse cursor appeared on the screen. Diagnostics showed that the tablet’s electronics are in good condition. Therefore, to repair the tablet, it is enough to replace the touchscreen with your own hands. After diagnostics, the tablet was turned off using the mouse.

While waiting to purchase a touchscreen, it is necessary to keep the tablet battery charged, since deep discharge sharply reduces the time battery life tablet.

Where can I buy a touchscreen for a tablet?

The search for a store to purchase a touchscreen for a children's MonsterPad tablet at a minimal cost led to a site that I personally have tested over time Chinese Internet AliExpress store. The site presented a large assortment of sellers of touchscreens for the MonsterPad tablet.

A seller with a large quantity was selected positive feedback and a high rating with an average price and free shipping. When choosing a touchscreen, pay attention to the presence of double-sided tape on it. If the screen is without adhesive tape, then replacing it will be complicated by the need to purchase such adhesive tape, cut it and secure it.

If you can’t find a touchscreen by the name of the tablet, you can try searching by its markings, which are usually applied to the flat cable running from the touchscreen.

The touchscreens of many tablet models are interchangeable. The main thing when choosing is to pay attention to the type of sensor and its diagonal size, expressed in inches. For example, the MonsterPad requires a 7" touchscreen.

The resulting parcel was a large, compared to the size of the touchscreen, polystyrene box completely wrapped in adhesive film. It is convenient to open such packaging by cutting the film with a knife along the line of connection of the box halves.

The touchscreen was removed from the packaging and carefully inspected for defects. Everything was in perfect condition. Trying on the glass on the tablet confirmed the size matches. To check its functionality, all that remains is to disassemble the tablet and connect the touchscreen to the motherboard.

How to disassemble the MonsterPad children's tablet

Before starting to repair the tablet, to avoid scratches on its case and display and dust getting between the display and touch glass, you need to wipe the table with a damp cloth and cover its surface with a soft, lint-free cloth. The only tools you need are a knife and a couple of small screwdrivers with a Phillips and a flat blade. After preparing the workplace, you can begin repairs.

The MonsterPad children's tablet can be disassembled easily thanks to the screw fastening of the back cover. Using a sharp tool, remove the four plug legs glued with adhesive and unscrew the four screws using a Phillips screwdriver.

Then, even without the help of a plastic card, grab the case halves with your fingernails in the area where the tablet's power button and connectors are installed, and carefully move the halves apart. The power and volume buttons must be immediately removed and set aside so that they do not get lost or scratch the tablet screen if they fall under it.

The tablet has been disassembled sufficiently to begin replacing the touch glass. All that remains is to remove the cable coming from the touchscreen from the connector. In the photo the connector is in the far right corner.

If the tablet was disassembled to replace the battery, then its type is clearly visible in the photo. To replace the battery, you first need to unsolder the red and black wires coming from it from the motherboard and carefully remove it, overcoming the adhesion force of the double-sided tape.

To release the touchscreen cable, you need to use a screwdriver blade to move the clamps a couple of millimeters in the direction indicated by the red arrows in the photo. After this, the cable can be removed from the connector without force.

How to check the touchscreen before installing it in a tablet

After removing the back cover from the tablet, it became possible to test the new touchscreen for functionality. To do this, without removing the protective film, you need to place a new touch screen on the broken one, carefully turn the tablet over, and observing the numbering of the cable, insert it into the connector on the motherboard and return the latches to their place. Then turn the tablet over with the display facing up and turn it on using the power button.

After downloading software you need to tap on any icon or just work a little on the tablet. If there is a reaction on the display when touching and scrolling through pages, then everything is in order and you can start replacing the broken glass. Before starting the repair, you must turn off the tablet with the power button and disconnect the cable of the new touchscreen from the connector.

How to remove a cracked touchscreen

To remove a cracked touchscreen, use the end of a knife to pry it at any of the corners and try to lift it up.

In the MonsterPad tablet, the glass was glued weakly; there was no need to even heat the glued area with a hairdryer. The force of the fingers was enough to peel it off. The main thing is not to rush and perform this operation very slowly and smoothly.

Preparing the tablet frame and installing the touchscreen

After removing the cracked touchscreen, use a rag soaked in alcohol to degrease and remove any remaining adhesive from the frame.

Fortunately, the cracked glass did not crumble into pieces and there was no need to use a vacuum cleaner or hair dryer to blow off the small fragments. For the same reason, it is not recommended to scrape off glue residue with a tool.

To ensure that the cable did not interfere with the positioning of the touchscreen when gluing, a piece of polyvinyl chloride tube was inserted next to its release hole, as in the photo.

In the next step, the protective film was removed from the touchscreen from the applied adhesive layer to the edges.

All that remains is to tuck the cable into the hole in the tablet frame, rest the corner of the touchscreen near the cable into the notch of the frame and slowly attach it to the frame, controlling the accuracy of the placement in the opposite corner diagonally.

The touchscreen fit into the recess of the frame exactly, without gaps or displacement on the first try. There is no need to press the glass tightly at this stage of repair. It is advisable to do this after fully assembling and checking the operation of the tablet.

The cable is long enough, which is convenient for installation. However, to prevent the cable from breaking if it gets caught between the covers when they are closed, it must be folded in half and pressed a little, avoiding sharp bends.

All that remains is to install the pushers of the buttons for turning on the tablet and adjusting the sound volume and snap the back cover to the base of the tablet. Screw in the four self-tapping screws and install the removed plugs on them.

The independent repair of the tablet was successfully completed, it began to work and look like new, and the child can play his favorite games again. Now, I believe, he will be more careful with his tablet and other gadgets. I did not remove the protective outer film from the touch screen; let the owner of the tablet remove it and be the first to tap (touch) the surface of the screen.

I hope given step-by-step instruction will help any home handyman, even those without experience in repairing such devices, cope with the repair of a tablet or smartphone.

The cost of replacing the tablet's touch glass with your own hands was less than 10% of the original cost of the tablet.

Implemented everywhere and in everything modern technologies significantly simplify our lives. The “sensory innovation” did not escape mobile devices- telephones. Today, most of these electronics are equipped with Touch Screen panels, through which the user can interact with particular ease. specific device communications. But, as you know, there is no smoke without fire... At some unfortunate moment, your favorite smartphone becomes “unresponsive”, not reacting to the touch of your fingers. However, replacing the touchscreen - as an inevitable process in repairing this type of fault - will help you regain lost control over the device. To learn how to do this yourself and why in some cases you still cannot do without the help of specialists, read this article.

About mobile fragility, optical illusion and the obligatory repair process

It often happens that when the phone falls, the touch panel breaks, but retains its “workable” qualities. Under such unfavorable circumstances, the device only loses its aesthetics. Nevertheless, it is difficult to disagree with the fact that broken lines of cracked glass or plastic spreading across the screen are, in general, an unpleasant sight. As you understand, in order to restore the former beauty and attractiveness of a “lost face” device, you will need to replace the touchscreen. It is necessary to reinstall the damaged part for one more reason: the display located under the touch panel becomes the most vulnerable. Since nothing else prevents the penetration of dust and moisture. And even with a slight mechanical impact on the screen - be it careless pressing, pinching or some previously uncritical pressure (a tight pocket, for example) - there is a high risk that the matrix will not withstand it and, as they say, will float.

A little about “Alas...”

Let's make a reservation right away: some modifications mobile phones Changing touch glass at home is simply unrealistic. Sometimes the manufacturer uses, so to speak, sandwich technology, firmly gluing the display and touch module together. Of course, such a “tandem” has a lot of advantages, but the main disadvantage is one: replacing the touchscreen (glued to the LCD) is impossible without the use of special equipment. Don’t be deceived by all those who have seen or read on the Internet about a miracle method that guarantees 100% success in the process of separating the screen from the “touch” - these are all stories or isolated cases of a successfully conducted experiment.

So, before embarking on a “touchscreen replacement” restoration project, make sure that your mobile device is not a “successor” of OGS (full lamination) technology!

How to change the Touch Screen module if it is removable?

First of all, you need to know exactly how your phone is disassembled. In the case when you dismantle the body parts of the smartphone, so to speak, blindly, it is unlikely that you will be able to avoid various breakdowns in the future. Without a special tool, some models simply cannot be disassembled. For example, to remove the back cover of an iPhone you need a pentalobe screwdriver. Some smartphones have glued casings, while others are oversaturated with various hidden fasteners. Well, still others even combine all sorts of structural tricks. In general, you simply cannot do without a disassembly manual.

General principles and fundamental rules: replacing a Samsung touchscreen

Only relatively recent modifications of the brand mentioned in the title are equipped with “hard-to-separate” screen modules. Other phones, such as the S5320 and others like it, are easily amenable to the touchscreen reinstallation process. Although, to be more precise, a plastic touchscreen, because the main material from which it is made is polymer. Well, let's take a look at the generally accepted universal algorithm of actions when replacing a removable Touch Screen element.

Purchase only original quality sensor modules.
Use the service manual to disassemble your device.
Take your time and be patient (psychology in microelectronics is an important component of a successful result).
Before picking or pulling anything, make sure that all the bolts are unscrewed and that any sticker does not hide a “forgotten” screw.
Be careful not to break internal cables and connectors.
Avoid any movement or gaps when positioning the touch screen; its edges should fit snugly against the base of the phone.

In general, be careful and consistent. Do not hurry! Glued - heat and release without jerking, twisted - unscrew and carefully lift. The main thing is that you should not have any “extra” details.

Solution for “glued” Touch Screen panels

When a Lenovo touchscreen is replaced (and models of this brand have recently been mainly equipped with “sandwich” display modules), specialized equipment is used - separators, or, as they are also called, preheaters. Naturally, a machine that is far from cheap is the prerogative of service centers and professional workshops. However, if you turn to specialists, then reasonable savings (after all, the screen is working) will ultimately be insignificant. Therefore, it is more advisable to purchase an original display module and install it yourself.

It is worth noting that for some smartphone owners the price of the part may seem a little expensive. Nevertheless, this is the only “painless” method to get rid of the problem we are highlighting on your own. Don’t try (oh brave ones of this world!) to repeat those stupid experiments using red-hot spirals and irons, which are abundantly available on the Internet. It’s better to let the screen remain intact, so to speak, for the future, than to crush or melt it when you carry out its “unconventional” replacement.

Sony's touchscreen couldn't be more reliable: a practical answer to an advertiser

Of course, this is a rather controversial statement, but it is not without meaning and there are provable arguments too. However, let's be realistic and, as an example, consider a step-by-step plan for implementing the repair process, which can be titled “Installing a new display module on a phone from a legendary brand with your own hands”:

Usually, back panel The smartphone is attached using an adhesive base.
Use a regular household hair dryer - walk along the edges of the protective cover (the back of the device) and gently lift one of the edges. Pull the blade of the tool around the entire perimeter of the body.
Dismantle all internal components of the phone, not forgetting that accuracy in actions is the key to the success of the enterprise!
The display module is also glued to the case base - warm it up and carefully remove it.

After you install the new screen, and with it the original touchpad and safely assemble your favorite phone, you will have something to be proud of!

As an encouraging ending

Replacing the Xperia or iPhone touchscreen is carried out according to the same scenarios as described above. If you don’t want to take risks and feel somewhat insecure with a screwdriver in your hands, contact a specialized workshop, and they will definitely help you. Well, I would like to wish inquisitive practitioners success in engineering research. All the best to you, and may your phone always be “mega-clickable”!