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.

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:

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.

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
PFO: Power Frequency Oscillator. It is present beside the antenna switch.
PFO of a Mobile Phone
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

Power Section: This section is below the Network Section.

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
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
Flash IC: This IC is found beside the CPU.
Flash IC of a Mobile Phone
Logic IC: The IC with 20 legs is the Logic IC.
Logic IC of a Mobile Phone
Charging IC: In the Power Section, the IC beside R22 is the Charging IC.
Charging IC of a Mobile Phone
Audio IC: The IC parallel to Power IC is the Audio IC.
Audio IC of a Mobile Phone

NOTES:

UEM (Universal Energy Manager) = Logic IC + Charging IC + Audio IC + Power IC
PFO (Power Frequency Oscillator) = Antenna Switch + PFO
Flash IC= RAM + Flash IC
Mobile Phone PCB Layout Diagram

Related Posts:

Mobile Phone Dictionary
Mobile Phone Repairing Tools
Card Level Parts of a Mobile Phone
Parts of a Mobile Cell Phone and Their Function (Big Parts)
Small Parts / Electronic Components of Mobile Phone and Their Function
Counting Legs or Pins of IC
Current | Electric Current | AC (Alternate Current) | DC (Direct Current)
Circuit Symbol / Circuit Schematic Symbols of Electronic Components
How to Check Mobile Cell Phone Settings
How to Open and Disassemble a Mobile Cell Phone
How to Use Multimeter
How to Jumper in Mobile Phone Repairing
SMD Surface Mount Electronic Components for SMT
Electronic Components & Parts & Their Function

By Santosh Das | Mobile Cell Phone Repairing

Tags: cell phone repairing, how to identify parts of a cell phone, how to identify parts of a mobile phone, how to repair cell phone, how to repair mobile phone, Identifying the Parts of a cell phone, Identifying the Parts of a mobile phone, Mobile Phone Parts Identification, mobile phone repairing, parts of a cell phone, parts of a mobile phone

Posted in Mobile Cell Phone Repairing, Parts of a Mobile Phone | September 15, 2012

39 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.

By zahid, May 9, 2014 @ 2:08 pm

this is very good site , i m new in this field i m learner i found its very very useful 100 % thax sir
i hope i will get more help from you to learn this

By Yogendra singh, May 10, 2014 @ 11:04 am

Thanks sir ur side is best.i hope always you help me thanx alots
By Dheivendran, May 29, 2014 @ 3:40 pm

Thank u sir and same publishing laptop services

By Nana Kwame, June 13, 2014 @ 11:09 am

Your site is wow b’cos you are impacting a lot about mobile cell phone not to me alone but to the world.May all the crew get more than understanding to continue teaching,blessed.

By RAFIKBHAI, July 14, 2014 @ 2:29 pm

Hi Its very good thank for Sharing its very helpfull i hope you update more info thank
By veeru, September 19, 2014 @ 2:21 pm

keep it up friend .really very thanks to u my friend
By bikash singh, October 6, 2014 @ 9:57 am

LG P350 network not working
plz help me
By bikash singh, October 6, 2014 @ 9:58 am

no services message on screen
By , October 6, 2014 @ 11:03 am

RESET The Phone to fix the problem.
By , October 6, 2014 @ 11:04 am

RESET The phone to fix the problem. Change the SIM and Check. If none of the 2 tips solve the problem then take the phone to service center.

By dev, October 7, 2014 @ 3:39 am

Really I do appreciate your hard work in preparing the notes from beginning to end, for mobile repairing. Thanks a lot..
I have one question, from where do we get track diagrams of different model?

By , October 7, 2014 @ 10:04 am

Tracks of different models are available in the market. You need to find them in stores that sell mobile phone accessories and tools.
By silviu, January 3, 2015 @ 2:16 pm

all good but how to know what big pcb part I’ have to change ,how to testing big part with multimeter ???%
By manjunath, February 18, 2015 @ 3:56 pm

I have done course in handset repair problem is where I can get valuable certification exam which exam I can write