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 | Santosh Das September 15, 2012

30 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

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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

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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

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

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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

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i hope i will get more help from you to learn this

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By Dheivendran, May 29, 2014 @ 3:40 pm

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

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