Mobile Cell Phone Repairing | Mobile Phone Repair Guide, Help, Tips, Pictures, Videos, Hardware, Software Solution

Small Parts / Electronic Components of Mobile Phone and Their Function

The PCB of a mobile cell phone has several small parts or electronic components. When learning mobile repairing, it is important to learn and understand how to identity these small parts or electronic components and understand their function. Identification of these small parts on the PCB of a mobile phone is easy if you know and understand some of the basic rules. It is also important to understand what to do if any of these small components is faulty.

Most of these electronic components are SMD (Surface Mount Devices). They don’t have any leads like thru-hole electronic components.


Small Parts / Electronic Components of a Mobile Phone: Identification, Faults and Function:

Boost Coil: Its size is little bigger than coil. It is found in black colour and

Mobile Phone Coil

Mobile Phone Coil

looks like a large button. Its function is to increase current. If this coil gets damaged then it has to be changed.

Coil: It is found in any section of a mobile phone. It is found in many shapes and sizes. Coils are found in 2 colours: (i) Black and white; and (ii) Blue and white. It has binding of copper coil inside. It filters and decreases Current and Voltage.

Capacitor: 3 types of capacitor are found in a mobile cell phone:

  1. Non-Electrolytic Capacitor: It is found in any section of a mobile
    Mobile Cell Phone Capacitor

    Mobile Cell Phone Capacitor

    phone. Its height is little more than chip resistance. It can be of gray, yellow or brown in color. It has no Positive (+) or Negative (-) side. It filters DC current.

  1. Electrolytic Capacitor: It is found in any section of a mobile phone. Its size is larger than non-electrolytic capacitor. It is found in 2 colors – (i) Orange with brown strip: and (ii) Black with white strip. The side with the strip is Positive (+) and the other side is Negative (-). It filters and stores current.
  1. Network Capacitor: It is found in any section of a mobile phone. It is made from 2 or more Non-Electrolytic Capacitors.

Coupler: This electronic component is found in the Network Section of a

Mobile Phone Coupler

Mobile Phone Coupler

mobile phone. It is of either black or white color and has 6 pins bent inside.

Function: It filters network.

Faults: If the coupler is faulty then there will be no network in the mobile phone.

Diode: Diodes are of 4 types:-

  1. Rectifier Diode: It is found in black color and converts AC Current to DC Current. It passes current in one direction. It does not pass current in reverse direction.

    Mobile Phone Rectifier Diode

    Mobile Phone Rectifier Diode

  1. LED: It is found in white or light yellow color and emits light.

    Mobile Phone LED

    Mobile Phone LED

  1. Zener Diode: It is found in charging section. It filters and minimize current and passes forward. It acts as voltage regulator. Zener diode has fixed capacity like 4V, 6V, 8V etc.

    Mobile Phone Zener Diode

    Mobile Phone Zener Diode

  1. Photo Diode: It is used for Infrared. It captures Infrared Rays.

    Mobile Phone Photo Diode

    Mobile Phone Photo Diode

Regulator: This electronic component is found in any section of a mobile phone. It is of black color and has 5 or 6 legs. It filters current and regulates voltage.

Mobile Phone Regulator

Mobile Phone Regulator

Resistance or Resistor: There are 2 types of resistance on the PCB of a

Mobile Phone Resistor

Mobile Phone Resistor

mobile phone:

  1. Chip Resistance: It can be found in any section of a mobile phone. It is of black color. In some sets it is also found in blue and green colour. It is the smallest electronic components on the PCB of a mobile phone. It Decreases current and passes forward.
  1. Network Resistance: It can be found in any section of a mobile phone. It is made from 2 or more Chip Resistance.

Transistor: This electronic component is found in any section of a mobile phone. It is of black color and it has 3 legs. It does the work of switching.

Mobile Cell Phone Transistor

Mobile Cell Phone Transistor



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By Santosh Das | Mobile Cell Phone Repairing

15 Comments

  • By Frank, May 1, 2013 @ 1:22 pm

    Thats a good one

  • By ram, July 22, 2013 @ 10:41 am

    best tips

  • By luhiga, August 7, 2013 @ 1:26 pm

    thanks alot do you assist to get the schematic for mobile phone.i need to buy

  • By peter otinget, August 29, 2013 @ 4:46 pm

    thanks for your web site i am really enjoying it

  • By gokul, September 6, 2013 @ 5:32 pm

    super

  • By gokul, September 6, 2013 @ 5:34 pm

    thanks for your information, very useful information.

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Mobile Cell Phone Repairing | Mobile Phone Repair Guide, Help, Tips, Pictures, Videos, Hardware, Software Solution Mobile Phone Repairing | How to Repair any Mobile Cell Phone including Nokia, Samsung, Motorola, China Mobile Phones, Sony Ericsson, LG, HTC, Apple iPhone, Blackberry, MyPhone and all other Mobile Phone. Includes Mobile Cell Phone Repairing Photos and Diagrams, Repairing and Service Tips, Tricks and Solution for Problems like – Speaker or Earpiece, Headphone, Mic or Microphone, Signal Problems like No Network, Charging Problem or Mobile Phone Not Charging, Motor or Vibrator, Ringer or Buzzer, Camera, Display, Screen, PDA, LCD, Power Button, Bluetooth, Infrared, Antina or Antenna Switch, Hand Free , Key Pad Not Working, Joy Stick Fault, Insert SIN or No SIM, Light Problem, No Power or Set Dead. Also included is How to Load Software (Flashing) to any Mobile Phone and Other Hardware and Software Problems and Solution.

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