Modern internal interfaces for connecting individual nodes within digital technology are almost impossible to imagine without loops.
These multi-core connections take on the role of a movable joint of electrical boards, individual models and other circuit nodes.
The most common types of loop connections include:
- Soldering (one of the most reliable methods, but it requires a certain technological process and equipment, overheating of circuit elements during soldering can damage them).
- Various mechanical joints (clamps, inserts, etc., making such a connection is very simple, no additional equipment or skills are required, the disadvantages include low reliability - the cable may not be fully pressed, contacts oxidize over time, etc.).
- Sticker on conductive glue / adhesive tape (we will dwell on this method of connecting cables in more detail).
What are the types of conductive adhesive for the cable
Initially, adhesive technologies were used to mount a chip on a substrate using a special conductive paste. In this case, soldering (that is, heating) was not required, the paste solidified, providing the necessary heat removal and electricity conduction.
Later, the technology was adopted to connect various kinds of displays and other digital equipment nodes.
Conductive adhesives provided reliable and fast adhesion with minimal dimensions (since there is no need for special connectors).
Modern conductive adhesives can be:
- Isotropic. They differ in that inside the conductive material there are no restrictions on the direction of current propagation, the medium is homogeneous. These can be ICA (Isotropic Adhesives) or ICP (Isotropic Pastes).
- Anisotropic. Inside a conductive material, current only propagates in a certain direction. This group includes ACA (anisotropic conductive adhesives) and ACF (anisotropic conductive films).
The latter are most widely used in household appliances. So, using ACF, you can glue the cable to the matrix of the LCD TV. The current will pass between the connected contacts strictly perpendicular to their surface inside the anisotropic adhesive tape.
The use of any adhesive mixtures is associated with certain restrictions. Various ACF films (adhesive tapes) are designed to bond certain types of materials, require compliance with temperature and humidity conditions, the absence of dust and other small particles that prevent adhesion, as well as certain conditions pressing the surfaces to be glued (minimum force, heating, etc.).
An important indicator of the use of ACF is the minimum required gap between the contacts (each type of film has its own).
VIDEO DESCRIPTION
How and how to glue the cable to the board
Most modern boards for digital technology use a mechanical method for connecting cables, however, in some cases, anisotropic conductive films (adhesive tape) or adhesives can be used.
To glue the flex cable to the board in the case of ACF it is necessary:
- Clean up any remaining joint/adhesive tape with isopropyl alcohol.
- Take an anisotropic adhesive film (suitable, for example, 3M Z-Axis 9703, before use, be sure to make sure that the distance between the contacts does not exceed 0.4 mm, since a short circuit can be obtained with a smaller size).
- Remove the first protective layer and stick the film on the board.
- Remove the second protective layer from the ACF film.
- Correctly match the contacts of the cable and the contacts on the board, attach the cable and evenly press it against the surface of the board with sufficient force.
When carrying out work, be sure to take into account that there should be no dust and small particles in the air (if the sticker is made in living conditions, work can be carried out in the bathroom).
The room temperature must be between +20°C and 38°C (but never below +10°C).
How to stick a cable to the display - a description of the method
The technology for mounting cables using conductive adhesive tape is identical to the process of connecting a cable and a board.
Differences can only be in supported materials (for example, Axis 9703 tape is not recommended for mounting on glass surfaces, only 5352R and 5552R films from the same manufacturer are suitable) and the minimum recommended gap between contacts (for example, 3M Z-Axis 5552R film can be used with a distance between contacts of less than 100 microns).
Some conductive films or adhesives may require heat or high force applied to the surfaces to be bonded during installation.
Before buying, be sure to read the film / adhesive specification. Specify how to apply.
Repairing torn cables with conductive tape
It often happens that in the process of disassembling displays or other complex equipment, when peeling off the cable, excessive force is applied, and it breaks.
The acquisition of such a seemingly simple element can become an almost impossible task, since similar conductors cannot be found on sale, as well as donors (broken equipment from which spare parts can be removed).
In this case, ACF film or glue will save the situation, regardless of the type of cable.
The procedure is as simple as in the case of connecting the cable to the board or monitor.
- The damaged section of the loop is cut out. To do this, the conductor is completely cut at a right angle in two places along the edges of the gust (damaged area).
- If necessary, in the area to be joined, the current-carrying parts are exposed (if the conductors are insulated in the middle of the loop) and treated with alcohol.
- The first layer of protective film is removed from the ACF, and the adhesive tape is applied to the end of one of the cable cuts.
- The second protective layer is removed and the second piece of the plume is applied.
- Depending on the requirements of the film installation technology, heating or a sufficient compressive force of the junction may be required (here it is important to consider that heating is contraindicated for some types of cables, which means that the connecting film should be selected with installation without heating).
VIDEO INSTRUCTION
The disadvantage of this method of recovering the loop is the reduction in its length.
Double-sided adhesive tape for the touchscreen comes to the rescue if the smartphone screen is accidentally damaged. Such unpleasant cases include a fall on asphalt, tile, or any other hard surface. Many give mobile phone to repair, where experts remove the damaged display and install a new one using double-sided adhesive tape.
What is this
Double-sided adhesive tape for the touchscreen resembles the usual one, but performs slightly different functions. There are more than two hundred types of tapes for smartphone screens, which are divided into two types: with a base and without a base. Adhesive transfer sheets are referred to as baseless. They are often used by Chinese manufacturers to fix the screen in a smartphone or tablet. Adhesive tape with a base is the most common type with a large selection of modifications. To mount the display, a thin and transparent tape with high heat resistance is used. Such adhesive tape is considered universal, it is easy to work with it, there is no need to select elements for a specific touchscreen. In terms of width, the most popular are tapes of 4, 5 and 6 mm.
How to use
Double-sided adhesive tape for the touchscreen is the main tool for a smartphone and tablet repair specialist. But this does not mean that you cannot replace a failed display on your own. The tape will hold the screen if you follow some installation rules:
- degrease both surfaces of the display with liquid isopropyl alcohol;
- let the alcohol dry;
- after applying the tape, spread it evenly over the surface so that air bubbles do not form;
- at the finishing stage, walk along the adhesive tape with a building hair dryer.
Touchscreen adhesive tape double-sided 2mm - a common and inexpensive type used for mounting. This material is a full-fledged replacement for transparent glue and is intended for repairing touch screens of tablet computers and smartphones.
What is it needed for
Adhesive tape 3m double-sided for mounting touchscreens - modern facility for touch screen repair. Unlike optical glue, it is easy to work with. Even experienced experts advise using tape for these purposes, and not a liquid consistency. One wrong move - and its particle will fall on the matrix and disable the entire display. Tape doesn't have this problem. In order to use the tape, you need to stick it on one side to the body, and on the other to the touchscreen. The adhesive tape can peel off if you do not follow the installation rules. Otherwise, this is a universal way to quickly replace glass. If necessary, the tape can always be changed to a new one if it loses its functions.
Peculiarities
The thickness of the double-sided adhesive tape for the touchscreen depends on the size of the display. Most often, tape is used to replace the sensor from 4.5 inches and above. When buying adhesive tape, consult with a specialist, as you need to choose the right thickness and width. Its main features - a large selection of sizes, colors, models. Adhesive tape is actively used not only for smartphone touchscreens, but also for computers, tablets, cameras, camcorders. In addition to tape for replacing touch screens, adhesive double-sided plates are used. They firmly connect the touchscreen and the case, are quickly mounted, and cost about the same as adhesive tape. Double-sided electronics tape has proven to be the most efficient and most convenient way to mount touch screens. Unlike optical glue, it leaves no residue and is easy to install and replace yourself.
pros
Double-sided adhesive tape for the touchscreen is a universal tool for repairing electronics. There are two most popular touch screen replacement methods.
- The old screen is replaced by cutting it using an automatic machine or manually. After removing the old glass, the touch panel is cleaned from adhesive residue. Then the specialist applies a new layer of optical glue, which must be cured under an ultraviolet lamp. A new touch screen is installed on top. The time of such repair is 70 minutes or more.
- The quickest and easiest method to replace a broken sensor is with double sided tape. The algorithm is about the same, only tape is used instead of glue. Glass is glued only at the edges. The display replacement time is halved in this case.
The advantages of double-sided adhesive tape include significant savings in repairs, quality of workmanship, availability of material, ease of installation, in addition, screen replacement is easy to perform without outside help.
Minuses
Should I use double-sided adhesive tape for the touchscreen (1mm or other width)? Despite the advantages of replacing the screen with adhesive tape, this method has a lot of disadvantages. When installing a touchscreen, be prepared for some problems.
- The display is in contact with the screen and the sensor if you slightly press on the glass at the top. Regular contact quickly disables the touchscreen. It is easy to recognize the problem: the screen darkens, changes color, stripes appear on it, the smartphone turns off by itself.
- Due to the fact that the touchscreen is glued only at the edges, dust accumulates inside.
- If the glass is exposed to direct sunlight for a long time or near radiators, the tape softens and the glass may come off.
- If the double-sided tape is mounted at the edges without the use of an optical adhesive, the glass becomes cloudy on the inside over time.
- If the smartphone is often in the sun, the screen will quickly fail.
- Double-sided tape can negatively affect image quality, color reproduction and saturation.
- Heavy use of the tape will cause it to lose its astringent properties after three weeks of use.
It is easy to avoid these problems if you entrust the replacement of the touchscreen to the master, and also take care of the technology.
Review
What is the best double-sided adhesive tape for a touchscreen? Manufacturers produce mounting tapes for failed touch displays of various thicknesses and widths. The most popular are 2-, 3- and 5mm. If the screen is broken, 3M Acrylic Adhesive Tape is the best solution. It is transparent and very thin. 3M tape is a universal tool for connecting the touchscreen and the body of the device, so it can be used to repair any equipment with a touch screen.
One of the types of mounting tape is thermal tape. It differs in that even high temperatures does not lose its properties. For example, the 3M 6mm product has a silicone-based adhesive that leaves no residue when removed. To install glass in Apple iPhone use special adhesive stickers made of safe and high quality materials.
The most popular for mounting touchscreens is 3M double-sided adhesive. Features of this tape: large thickness, the adhesive is made of natural rubber, so it connects to the surface firmly and does not emit toxic substances. When replacing the tape, there are no sticky marks and adhesive residues on the edges. The advantages of the mounting product include versatility. The tape is used not only to replace touch screens - the scope of its application is quite wide. The adhesive tape is made of tissue paper, retains its functionality at high temperatures - from 70 to 150 degrees.
Selection rules
Which double-sided tape for the touchscreen should I choose? If you are looking for a tape to replace the display, pay attention to the thickness and width of the product when choosing. Experts recommend purchasing double-sided acrylic-based mounting tape, transparent, with high heat resistance (270 degrees). However, it should be noted that this option is the most expensive. Tapes with a width of 4 to 6 millimeters are popular; 7- and 9mm - rarely bought because of the high price. The standard roll length is 50 m. A 2 mm (25 m) touchscreen tape costs 150 rubles. The maximum price of professional adhesive tape is more than a thousand rubles. When choosing a tape, consider the size of the display and the smartphone model.
Our attentive readers will remember that from time to time our friends at YourOptibay please us with useful instructions for repairing our computers. Today we are waiting for a fascinating story on how to upgrade the penultimate thin iMac 21.5" Late 2012 with an SSD in addition to a regular HDD to create a FusionDrive.
Step 1
Before starting any work with the iMac: Disconnect it from the mains and hold down the power button for ten seconds to discharge the power supply capacitors. Before disassembly, we advise you to wear special antistatic gloves.
Step 2
We insert a special knife to open the iMac. We immerse it in the gap between the case and the screen of this disk, and, moving up, slowly separate the screen from the case.
Step 3
We use it like a pizza cutter. When moving up, the disk will rotate, cutting the double-sided tape.
Step 4
We cut through the double-sided tape on all sides, except for the bottom.
Step 5
We attach two suction cups and gently pull up, lifting the display. Don't rush, it may take some time. As soon as the screen rises slightly, we separate the adhesive tape from the display with a spudger.
Step 6
While holding the display with one hand, disconnect the display power cable. Be careful not to raise the display more than 15-20 centimeters. iMacs still have cables connecting the display and the case.
Step 7
Disconnect the display data cable from its socket on the motherboard. To do this, lift the bracket that secures the cable connector in the connector on the motherboard, and then lift the screen.
Step 8
With a little effort, we remove the cable of the right speaker.
Step 9
We unscrew the two T10 10 mm screws that secure the right speaker to the monoblock body.
Step 10
We separate the right speaker from the back of the case, approximately 1.5 cm, until we can see the antenna cable running along its right side.
Step 11
Using the sharp end of the spudger, we remove the antenna cable from the grooves, moving from top to bottom.
Step 12
Carefully pull out the right speaker two centimeters up, and then tilting it out.
Step 13
We unscrew the 4 screws that secure the brackets holding the hard drive:
- 2 screws 21 mm T10 Torx
- 1 x 9mm T10 Torx screw
- 1 x 27mm T10 Torx screw
Step 14
Remove the right and left brackets that secure the hard drive.
Step 15
Antistatic gloves are especially recommended for this step. The work takes place close to the power supply, and in their absence, there is a possibility that the accumulated voltage on the capacitors will hit you. With a little effort, we remove the power button cable from the connector.
Step 16
With light movements to the right and left, disconnect the power control cable.
Step 17
We unscrew the 2 screws 7.2 mm T10 that secure the power supply board.
Step 18
Tilt the power supply forward. The board has a lot of capacitors, so it is not recommended to do this operation with bare hands, as there is a chance of getting an electric shock.
Step 19
Lift and slightly turn the power board counterclockwise.
Step 20
Slightly shift the power board to the right and lift it up a couple of centimeters. Be careful: the complete removal of the board will be a little further. On this moment the power board is still connected to the motherboard.
Step 21
We hold the board exclusively by the edges - there is a chance of getting an electric shock. We turn off the loop with light movements to the sides.
Step 22
Disconnect the power cable from the motherboard and pull it out.
Step 23
Disconnect the cooler cable from the motherboard.
Step 24
We unscrew 3 screws 12.3 mm T10 that secure the cooler to the case. We take it off.
Step 25
Raise the hard drive.
Step 26
Disconnect the power cable and data cable of the hard drive. We remove the hard drive.
Step 27
Remove 1 7.2mm T10 screw that secures the hard drive bay.
Step 28
Pull out the hard drive bay.
Step 29
Disconnect the left speaker cable.
Step 30
We take out the cable of the left speaker from the clamp.
Step 31
We remove the data cable and the hard drive power cable.
Step 32
We lift the metal bracket with a small handle and take out the cable.
Step 33
Disconnect all 4 antenna/AirPort connectors. We remember in what order these connectors were located.
Step 34
Disconnect the headphone port cable from its socket.
Step 35
We unscrew the four screws that secure the radiator to the monoblock body.
- 2 x 6.3mm T8 screws
- 2 x 4.7mm T8 screws
Step 36
Remove the 4 7.2mm T10 screws holding the motherboard.
Step 37
Very carefully remove the motherboard. Be careful not to let any wires get in the way of removing the motherboard.
Step 38
Step 42
It is necessary to disassemble the case of the SSD disk, and remove the board from it, to place it in the iMac case. We cut the double-sided thermal tape into four squares and arrange them, as in the photo. We place the SSD drive board on the iMac case next to the left speaker.
Step 43
We return the motherboard to its place, fix it according to the steps in the instructions. We lay the power cable around the cooler. Be careful: you need to arrange the cable so that it does not touch the cooler blades, this threatens to overheat and damage the iMac. We lay the data cable on top of the cooler and connect it to the SSD. We put the hard drive in place. We connect it.
Step 44
We remove the old double-sided tape, first prying it with a spudger, and then slowly pull it up.
Step 45
After removing the old double-sided adhesive tape, it is necessary to degrease the surface where we will apply the new adhesive tape, both on the case of the monoblock and on the case of the display module. We recommend using solvent 646. You need to stick a new double-sided tape on the case and install the screen, remembering to connect two cables to the connectors on the motherboard.
Conclusion:
Thus, we were able to upgrade the stock iMac 21.5” configuration with a conventional HDD hard drive on board — an additional 250Gb Samsung SSD. Now the all-in-one is ready to install FusionDrive and then install Mac OS X. The performance gain is 4 to 10 times. For example, the OS began to boot in 12 seconds instead of 50 seconds in the standard configuration.
If you doubt that you yourself will be able to make a replacement, we recommend that you contact the specialists from YourOptibay.ru. Our office iMac is literally alive new life and from a sluggish and tired computer turned into a jaunty candy bar, solving all the tasks assigned to it easily and, most importantly, quickly.
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