Second Q: To see the cable you usually have to dismantle the phone, it's a bit of a pain in the ass, and it's usually at the back of the inner screen!
Maybe mine is not professional! Take it yourself The following is more professional But, it looks like a headache!
Phone wires, that is, the phone's motherboard connected to the phone's display wires, the camera, keypad and motherboard wires are also wires. What the display sees is controlled by the motherboard output, and the role of the row cable is here. It is responsible for the data transfer between the phone's motherboard and the display.
The cable is replaceable, but there are 2 types of cables.
1, there are not a lot of resistors and speakers and other things on the line (very small), such a line for about only 50 yuan, very cheap, change, you must remove all the small parts, and then re-soldered to the new line, this is very troublesome, need to be very good soldering skills.
2, the line comes with small parts, needless to say, directly connected to the can, probably need 150 ~ 200 yuan! But change the row of wires is still a relatively troublesome thing, to break down the machine all the way! So remind the future flip cover to be less times oh! Because the row line belongs to the consumable goods!
Mobile phone cable failure, the performance is more obvious: such as screen, no display, no light, no earpiece sound, no ringing, do not turn on the phone, key failure. Reduce the method of broken wires:
After the replacement of the wires, the transparent adhesive paper with scissors cut into the appropriate size of the adhesive strip, and then use these adhesive strips of the wires to the turn of the completely wrapped (because the turn of the line is generally easy to break), wrapped to be even to wrap around the appropriate, make sure that you do not wrap too thick. Finally, in the row of wires through the case with a knife to flatten, cut a little wider. This will make the rework rate greatly reduced
The professional term for cell phone wiring is called Flex Circuit Characteristics
Flex Circuit Characteristics
-Flex Circuits are small in size and light in weight, and flex circuit boards were originally designed to replace the larger harness wires. In today's cutting-edge electronics assembly boards, flex circuits are often the only solution to meet miniaturization and mobility requirements. Flex circuits (sometimes called flex printed circuits) are copper circuits etched onto a polymer substrate or printed polymer thick film circuits. Design solutions range from single-sided conductive circuits to complex multi-layer, three-dimensional assemblies for devices that are both thin and lightweight and whose structures are compact and complex. The total weight and volume of a flex assembly can be reduced by up to 70% compared to traditional round conductor wire harness methods. Flex circuits can also be made stronger by using reinforcement materials or backing plates for additional mechanical stability.
-Flex circuits can be moved, bent, and twisted Flex circuits can be moved, bent, and twisted without damaging the wires, and can conform to different shapes and special package sizes. The only limitation is the size and space. Because they can withstand millions of dynamic bends, flex circuits are well suited for inline systems with continuous or periodic motion, into? The final product is part of the functionality of the product. part of the product's functionality. Solder joints on rigid PCBs are subjected to thermo-mechanical stresses and fail after hundreds of cycles," said Randy Lia, product manager for Shel-dahl, Northfield, Minn. Randy Lia, product manager, said, "Certain products that require signal/power movement with small form factors/package sizes benefit from flex. products are benefiting from flex circuits."
-Flex circuits offer excellent electrical properties Dielectric properties Thermal resistance Flex circuits offer excellent electrical properties. Don friedman, CEO of Inter-national Flex TEchnologies, Endicott, New York, said. "The lower dielectric constant allows for fast electrical signal transmission; the good thermal properties make the components easy to cool down; and the higher glass transition temperature or melting point allows the components to operate well at higher temperatures."
- Flex circuits offer higher assembly reliability and ? Volume Flex circuits reduce the amount of hardware required for internal connections, such as solder joints, relays, backplane lines and cables commonly used on traditional electronic packages, allowing flex circuits to provide higher assembly reliability and? volume. Because of this, flex circuits can be used in a wide variety of applications. Complex multiple systems made up of traditional inline hardwares are prone to higher rates of component misalignment during assembly," said Mike Giesler, marketing manager for 3M Electronic Products Division, Austinm , Texas. "Flex circuits have low stiffness and low volume, which is precisely why? Flex circuit board components are smaller, so they use less material." With the advent of quality engineering, a flex system with a very thin thickness is designed to be assembled in only one way, thus eliminating many of the people normally associated with stand-alone wiring engineering? errors.
The use of flex components is increasing dramatically .Jim Barry, president and general manager of Strataflex Hudson, N.H., said, "Almost when you pick up any appliance today, you will find a flex group?quot; in it. Open up a 35mm camera and there are nine to 14 different flex circuits inside because? Cameras are getting smaller and more functional. The only way to reduce size is to have smaller components, finer lines, tighter pitches, and objects that are bendable. Pacemakers, medical devices, video cameras, hearing aids, portable computers - there are flex circuits in almost everything we use today."