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

Mobile Phone Parts Identification | How to Identify Parts & Components on PCB of Mobile Phone

When learning how to repair a mobile cell phone, it is important to learn how to identify parts and components on the PCB of a mobile cell phone. Identification of these parts and components is not that difficult.

The PCB of any mobile phone of any brand namely Nokia, Samsung, Motorola, China Mobile Phones etc is divided into 2 Parts namely: (1) Network Section; and (2) Power Section. When identifying parts, electronic components and ICs on the PCB of a mobile cell phone, it is important to keep these two sections in mind.


How to Identify Parts and Components on the PCB of a Mobile Cell Phone:

  1. Antenna Point: The point where antenna is connected is called antenna point. It is normally located at the top of the PCB of a mobile phone.

Network Section: The section below antenna point and above power section is called network section.

  1. Antenna Switch: It is found in the network section. It is made from metal and non-metal. It has 16 points or legs. In some mobile phones, the antenna switch is merged with PFO.

    Antenna Switch of Mobile Phone

    Antenna Switch of Mobile Phone

  2. PFO: Power Frequency Oscillator. It is present beside the antenna switch.

    PFO of a Mobile Phone

    PFO of a Mobile Phone

  3. Network IC: It is below or beside the antenna switch and PFO. In some mobile phones, the Network IC is merged with the CPU. E.g.: Nokia 1200, 1650, 1208, 1209 etc.

    Network IC of a Mobile Phone

    Network IC of a Mobile Phone

Power Section: This section is below the Network Section.

  1. Power IC: In the Power Section, the IC around which there are several brown-colored capacitors is called Power IC. In some mobile phones there are 2 Power ICs.

    Power IC of a Mobile Phone

    Power IC of a Mobile Phone

  2. CPU: Central Processing Unit. In the power section, the largest IC is the CPU. In some sets there are 2 CPU.

    CPU of a Mobile Phone

    CPU of a Mobile Phone

  3. Flash IC: This IC is found beside the CPU.

    Flash IC of a Mobile Phone

    Flash IC of a Mobile Phone

  4. Logic IC: The IC with 20 legs is the Logic IC.

    Logic IC of a Mobile Phone

    Logic IC of a Mobile Phone

  5. Charging IC: In the Power Section, the IC beside R22 is the Charging IC.

    Charging IC of a Mobile Phone

    Charging IC of a Mobile Phone

  6. Audio IC: The IC parallel to Power IC is the Audio IC.

    Audio IC of a Mobile Phone

    Audio IC of a Mobile Phone

NOTES:

  1. UEM (Universal Energy Manager) = Logic IC + Charging IC + Audio IC + Power IC
  2. PFO (Power Frequency Oscillator) = Antenna Switch + PFO
  3. Flash IC= RAM + Flash IC

    Mobile Phone PCB Layout Diagram

    Mobile Phone PCB Layout Diagram



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By Santosh Das | Mobile Cell Phone Repairing

24 Comments

  • By All about mobile phone life, September 24, 2012 @ 3:10 am

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  • By Dagnachew, November 23, 2012 @ 12:01 pm

    It is good Keep it up!!!

  • By , December 23, 2012 @ 1:44 am

    Thanks for the appreciation.

  • By sadiq, March 31, 2013 @ 10:19 am

    very nice.I am a beginner in mobile servicing field.Your contents are very easily understandable.Thaaanks a lot…………

  • By Darlington, April 2, 2013 @ 7:04 pm

    Hi God bless you so much, you’ve really changed and shaped my destiny through this tutorials

  • By wayeso gebeyehu, August 31, 2013 @ 7:43 pm

    to be honest i found your lesson so amazing and teaching. keep it up

  • By hussain, November 2, 2013 @ 8:00 am

    Thanx Alot This Site is very helpful Keep It Up

  • By mr. X, November 2, 2013 @ 9:56 am

    how to check the track for speaker problem for jumpering….where it starts and where it should end

  • By , November 4, 2013 @ 10:11 am

    You will need Track Diagram of different models. Books are available in the market and online.

  • By luhiga, December 7, 2013 @ 8:42 am

    Hi Sir,
    Thanks alot for time use to prepare the lesson to anyone who interest to learning,how to repair mobile cell phone, and alot you done well.I have appriciate yourjob. God bless you and your family.Iam learning to you .

  • By deep jaan, December 25, 2013 @ 6:59 pm

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  • By mene, December 26, 2013 @ 2:08 pm

    sir, your tutorial is 100 percent useful and helpful please keep it up.expecting more tutorial in advance.

  • By Sanjay, December 30, 2013 @ 11:58 am

    Hi,
    Information’s provided by you is very very useful.
    I have one issue.
    I have given my Sony xPreia st23 (Miro) for repairing as theer was some water droplets inside.
    Technician told me that LCD terminals have gone and he proposed for LCD replacement.
    But after so many days he is not able to find right connection for backlight.
    Aleady he is able to see SONY logo but display not appearing even with a new LCD.
    Could you please guide with some pic or sketch how to fix the issue.

    Thanks

  • By , December 31, 2013 @ 10:32 am

    You have to replace the Display LED. These are SMD LEDs that provide front and back light to any mobile cell phone.

  • By Jose, January 23, 2014 @ 1:25 pm

    Excellent work guys, Really helpfull Thanx

  • By Sappor Joshua, February 6, 2014 @ 9:57 am

    God will bless you for help us .thanks

  • By kARTHICK PRASAD, February 10, 2014 @ 4:37 am

    Its really nice and easy for understanding. From now onwards i follow your site, if i feel any doubt in mobile servicing. Thanks for your support.

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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 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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