The first module will act as a bridging course for those students who do not have any prior knowledge about the field. For others, who already have prior knowledge about electrical and electronic engineering, this module will help them revise these concepts.
The second module will focus on hardware and teach the students how to handle and replace various electronic parts. It will help them to learn all the hardware repair procedures in a more comprehensive manner.
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Software problems are some of the most common ones faced by smartphone users. Sometimes, a software problem can lead to hardware abnormalities as well. This module will teach you how to perform various software repairing techniques.
To be a successful mobile phone repair technician, one needs to know more than just the technical aspects of fixing a phone. This module aims to teach some additional topics to help you become a better mobile phone repair engineer.
We also teach our students various tips, tricks and trade secrets which are unknown to many technicians. This will help you in your all-round development and make you a professional mobile phone repair technician.
Mobile repair book is a 120 page complete manual that answers all the basic to core level questions for entrants into mobile phone repair technical support segment. The book takes the reader one step at a time, combining a strong theoretical knowledge based on Mobile phone devices (how they function, description of their internal chip components with tutorial on the basic foundation electronics for repairing and merged it with descriptive easily, practically and getting tutorials on both hardware and software related repair procedures for Mobile phone Information about hardware and software repair tools is covered with product listings and guides for success.)
What this book teaches is practicable towards becoming a good Mobile phone technician. The tutorials cover Microelectronic device dis-assembly and re-assembly, troubleshooting, BGA soldering, detailed electronics fundamentals, flash programming and many others. The book ends with a chapter of information on how to set up a shop and efficiently managing a mobile repair services support center. Discover the secrets about mobile phone repair with these books. About the Author: Er.D.P.Tiwari has setup and managed a regional training service centers within the last twenty years; taught thousands of Mobile,Computer,Laptop,TV repair technicians in partnership with governments ,NGO,INGO and individually over the past twenty years. He holds a Bachelor of Engineering(BE) in Electronics & Communication Engineering. He also holds multiple industry standard certifications from major OEMs. He consults in Information and Communication Technology, a training consultant who has mentored a good number of individuals who run successful businesses. His classes are never boring as he has a knack for making complex topics both understandable and entertaining.
Inside a Mobile phone, a circuit board is one of the main components, along with various other individual sections such as the Cover(Housing),liquid crystal display (LCD), antennae pad, microphone, battery, speaker,Vibertor and Camera. The Mobile phone circuit board is considered to be, for all intents and purposes, the brain area of the phone. It runs the entire system. There are several components of the circuit board that work together to ensure the proper functioning of the Mobile phone.List of major mobile phone parts/components.
The outer shell for the protection of all the parts inside the mobile phone is called housing. The design and color may vary according to the housing mobile phone set. The housing of some of the mobile phone sets in our market is available in the market. If it is broken or discolored, a new change can be made. The main part of phone housing is made of polycarbonate, and the metallic one is made of aluminum. Nowadays, among all the plastic stuff on the shelfs, metallic phone housings are more noticeable. Usually, aluminum and magnesium are used for housings. Aluminum is very solid and light, but it is difficult to make the needed shapes and details. Magnesium alloys are comparatively good in molding, but comparing to aluminum alloys, magnesium ones are not corrosion resistant and require painting. 3. Mobile phone Touchpad
An electronic visual display that the user can easily control with the finger of his hand is called a touch pad. Apart from mobile phones, touch pads are also used in computer monitors, laptops and gaming devices. There are many types of touch pads. The touch pad currently used in smart phones is very responsive, so it works at the slightest touch. Indium tin oxide coding is done without layers (insulators) in such touch pad glass. The touch pad contains several layers of material. The top layer is the pad that you touch. Beneath it are layers (separated by very thin insulation) containing horizontal and vertical rows of electrodes that form a grid. Beneath these layers is a circuit board to which the electrode layers are connected. The layers with electrodes are charged with a constant alternating current. As the finger approaches the electrode grid, the current is interrupted and the interruption is detected by the circuit board. The initial location where the finger touches the pad is registered so that subsequent finger movement will be related to that initial point. 4. Mobile phone Display
LED- light emitting diodes technology A semiconductor LED diode that emits light when charged with electricity. They come in diverse colors and some LEDs even contain multiple elements and are therefore capable of emitting light with different colors.
TFT:Thin Film Transistor technology TFT technology is an active-matrix technology, meaning that a tiny circuit (a transistor) is located next to each pixel, allowing the pixel to be turned on and off individually. This permits faster response time and greater contrast compared to passive-matrix technology.
IPS:In-Place Switching technology (IPS-In-Plane Switching panel) An active matrix LCD screen technology developed by Hitachi in the mid-1990s that provides more uniform color reproduction and greater viewing angles than traditional twisted nematic (TN) LCDs. Maturing for more than a decade, IPS was deployed in tab phone and various smart phones. Viewers appreciate the wide angle and color quality, because tablets are widely used as movie players and photo albums.
AMOLED/Super AMOLED: Active-Matrix Organic Light-Emitting Diode technology AMOLED display :When compared with a regular LCD display an AMOLED display consumes less power, provides more vivid picture quality, and renders faster motion response as compared to other display technologies such as LCD. However,
Super AMOLED display : It consists of a set of thin film layers of electroluminescent power-producing organic compounds and a pixel-modulating matrix. Super AMOLED is a more advanced version and it integrates touch-sensors and the actual screen in a single layer.
POLED/PMOLED: Plastic Matrix Organic Light-Emitting Diode (Flexible display) POLED display: or Plastic Light Emitting Diode, is a display technology that uses a flexible plastic substrate such as polyethylene terephthalate (PET) instead of glass for the electroluminescent organic semiconductor to be deposited. The use of more malleable plastic instead of glass allows the display panel to be bent, folded or rolled up without breakage.
When you open the housing of the mobile phone, you will see a board with all the components connected as shown below. This board is called PCB (Motherboard). This motherboard is the most important part of a mobile phone. Motherboard is commonly exist in Electronics devices and mobile phones. Since it contains of a variety of metals and semiconductors, it is difficult to recover the materials in PCB. The latest smartphones available on the market today, researchers and engineers are constantly developing new ways to make our phones smaller, faster and more efficient. Due to the increase in capabilities of Motherboard, Motherboard have gotten smaller in size and more powerful. This lets manufacturers put more components in a smaller amount of space to deliver all of the features. Circuit-tracing is a term used by mobile phone repair technicians to check broken tracks on the PCB (Motherboard). Many of the times problems come in cell phones, if the tracks get broken. These tracks are not visible as they are drawn inside the circuit boards. Most of these motherboards have 7-10 layers which have tracks/lines going from one end to another for supply of voltage and signals.
A steel plate / leaf is placed on top of the mobile phone set. This is called antenna pad. In most mobile phones, the antenna pad is placed at the top, but in some sets it may be placed at the bottom. In the beginning, the mobile phone sets that came in the market used to have aerial instead of such a plate, but now there is no aerial in the mobile phone sets available in the market. Both the incoming and outgoing signals from the mobile phone set come and go through this antenna pad. This plate is well integrated with the motherboard.
The microphone receives the sound waves we speak and converts them into electrical waves. The microphone is placed at the bottom of the mobile phone set. Inside the microphone is a diagram (a sheet of shiny thin plastic) that shakes as we speak. When we move in and out in this way, a kind of electric wave is generated and our sound wave enters. There are two types of microphones used in mobile phone sets.
A. Mobile phone Ordinary microphone(Electret Microphone) An Ordinary or electret microphone is a type of condenser microphone that has a permanently-polarized capsule.The capsule, which acts as a parallel-plate capacitor, is charged via a quasi-permanent electret material that is applied to either the front plate (diaphragm) or stationary backplate. With a permanent charge across the plates, any change in capacitance in the electret condenser capsule creates an inversely proportional change in voltage across the plates. Ordinary mobile phones use a two-pin microphone as shown in the picture below. B. Mobile phone Digital microphone(Mems Microphone) A MEMS Microphone(micro-electromechanical systems) mic is a pressure-sensitive diaphragm etched into a silicon wafer via MEMS processing. MEMS mics are largely based on electret capsules and typically have onboard preamps and analog-to-digital converters. MEMS mics are also known as digital mic,mic chips or silicon mics. A digital microphone MEMS design will typically have an additional metal-oxide-semiconductor (CMOS) chip that acts as an analog-to-digital converter. These chips effectively take the amplified analog audio signals and convert them into digital data. These ADCs allow digital MEMS microphones to be more easily integrated with digital products. Of all the smart mobile phone sets coming in the market today, digital microphone is the most used. This microphone has three,four or five pins as shown in the picture below. 152ee80cbc
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