Components of phones and functions you need to know

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Components of phones are an important part of keeping your phone running smoothly and well. Components in phones come in many different types, and each represents one or more corresponding functions. To learn more about the types of components used in mobile phones, follow the article below!

What are the components of phones?

Mobile phone components are the electronic components installed in mobile phones. These are discrete, individual parts such as LCD screens, speakers, cameras, microphones, capacitors, resistors,… These parts, when assembled together, will form a unified whole. for the general purpose of making the mobile phone perform at its best.

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Uses of components for phones

Each type of component assembled in the phone will perform a specific function. But looking at them, the effects of components on the phone will be divided into two types:

  • Improve the current functionality of the device: Products such as batteries, speakers, cameras, screens, etc. can be replaced when the phone is damaged. It can help the phone return to its original usability.
  • Upgrade phone model: Maybe some functions in the phone, such as the speaker or camera, no longer meet your needs; in this case, you can choose to replace components to improve the function of your phone. phone, helping you to use it better.

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Types of components in phones and corresponding functions

LCD screen

An LCD screen is a type of liquid crystal display that works on the principle of backlighting. This type of screen has the function of displaying CPU processing results, creating a user interface with high contrast, brightness, and resolution, and showing sharpness and vividness for images displayed on the screen. screen.

The LCD screen is one of the most popular replacement components because it often breaks the cable when the user accidentally drops the phone, causing display loss or the screen to appear in horizontal and vertical stripes.

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This component is present in most smartphone lines. It has the functions of filming, taking pictures, and meeting the needs of users. When the camera in the phone is damaged, it will often appear that the video recording or screen capture becomes black, or when the video is turned on, the device hangs or turns off.

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The loudspeaker is a cylindrical coil placed between the two poles of a permanent magnet. This type of magnet has a relatively strong magnetic field; if current flows through the coil, the coil will create a magnetic field. At this time, the magnetic field of the coil will be pushed by the magnetic field of the magnet, causing the coil to move. If alternating current is passed through the coil, it will move around the equilibrium position.

The manufacturer will attach the coil to a paper membrane that will become a speaker, and when the diaphragm vibrates at a high frequency, it will emit sound. If the speaker is damaged, there will be no sound. To test the speaker, you should measure the resistance between 29 and 32 ohms and leave the meter at the X1 Ω scale. Swipe the measuring stick between the two poles of the speaker and see if the speaker squeaks.

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The bell is a component of phones that has a similar structure to a speaker, but instead of attaching a paper membrane to the coil, the manufacturer will attach a hard membrane to it. When an audio signal arrives, the bell will sound.


The microphone is also structured like a speaker and bell, but the coil will be wound more turns, thereby making the impedance of the coil higher. In particular, the membrane of the microphone is also much thinner, so the sound waves can affect the membrane, making it easier for the membrane to vibrate.

The principle of operation of the microphone is as follows: When a sound wave hits, the microphone membrane will vibrate, and the coil will oscillate in the magnetic field, generating an induced voltage to transmit the signal. If the microphone is damaged, the other party will not hear what you say.

Resistance (R)

Resistors are indispensable components in all electronic devices, especially phones. The function of the resistor is to limit the amount of current passing through the circuit, divide the voltage, and adjust the signal level as desired.

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Capacitor (C)

A capacitor is a type of component in phones that is made up of at least two electrical conductors in the form of metal plates separated by a dielectric layer. The main function of a capacitor is to store electrical energy, store electricity, and store charge efficiently.

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Diode (D)

The diode in the phone is a type of semiconductor device made of silicon, phosphorus, and boron compounds. The diode is used to rectify the current, helping to convert alternating current into direct current.

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Similar to diodes, transistors are also types of semiconductor devices, but they are used to amplify audio and high-frequency signals, switch circuits, regulate voltage, and create oscillations.

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Above, we have introduced popular components of phones and their main functions. We hope that, through this article, everyone has found a lot of useful information. If you need more advice on electronic components, solder, solder paste, etc., please contact The tech to get the fastest support!

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