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....
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
- Smartphone Repairing
- Electronic Components & Parts & Their Function
Hai Sir…
I just saw your lectures today, There were many clarifications, They are satisfied with me.
Are there any clarifications about new Android motherboards? Eg: SAMSUNG A3, J7, NOTE 5.
nice sir sorting nahi ja rahi 750 aa rhy hai samsung ka b313 hai mobile aur na hi on ho raha hai kya kru
reply plese sir
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Hi Das ,
this is santhoshkumar i have blackberry 8520 curve it is not working now i don’t what is problem will you please help me
What is the problem with the phone? Is it completely dead? If Yes, then please get it serviced.
Dear Das.
Many many thanks for your fruitful complete guidance towards the repairing of different kinds of mobiles. I found very simple and easy to understand all the componetns included in the mobile set. Thanks for sharing your valuable knowledge. Keep it up!
Regards
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Sir muje smart phone ki pcb dek ne ke liya kya krna hoga
Dear sir, M Nagaraj from karnataka! Sir, i learned mobile repaire course recently, i will open mobile service shop! How to prepare give tips?
Sir pls muze koi mobile repair ki hindi pdf file send kro…. iam waiting
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Important to learn about this thanks
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all good but how to know what big pcb part I’ have to change ,how to testing big part with multimeter ???%
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?
Tracks of different models are available in the market. You need to find them in stores that sell mobile phone accessories and tools.
no services message on screen
RESET The Phone to fix the problem.
LG P350 network not working
plz help me
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.
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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
You have to replace the Display LED. These are SMD LEDs that provide front and back light to any mobile cell phone.
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how to check the track for speaker problem for jumpering….where it starts and where it should end
You will need Track Diagram of different models. Books are available in the market and online.
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