Monday, April 22, 2013

cell phone repairing tutorials

Here's a best gsm links for all new learners in GSM industry, Learn the
basic here like me. I learned here from the start. I'm just a mobile
phone sales lady a year ago but now rock fixing mobile phones.
All lessons herein were all simplified and a few

general technical terms being reduced to make easy learning and
understanding, Images and Pictures were also gathered and choose
appropriately to support every aspects of learning.
 




These tutorials covers the following
 step by step lessons:

LESSON 01



Basic Information How Cellphone Works?
Learning with Block Diagram on How basically Cell-phone works?


LESSON 02

Introduction To Basic Electronics

Ohm's Law

Series Circuit



Parallel Circuit



Identifying Electronics Components and Circuit Symbols 



Resistors



Capacitors


Transistors



Diodes



Fuse



Coils & Inductors



Crystal Oscillators



RF & IF Amplifiers and Filters


EMI and ESD Filters



LESSON 03




Preparing the Proper Tools For Repairing


Opening Tools and Tweezers



Soldering and Desoldering Tools



Muti Tester



SMD Rework Stations



DC Power Supply



Cleaning Kits



Reballing Kits



Working Table Equipments



LESSON 04




Safety Procedures and Proper Handling of Tools and Test Equipments on Cellphone Repair

How To Use and Read a Multimeter Tester



Test and Check up Procedures on Basic Electronics Components

LESSON 05




Introduction to 
Reading Cellphone's Schematic Diagrams


Identifying Component Symbols and Layout in Schematic Diagram



How to Identify Resistor's Symbols and Layout



How to Identify Capacitor's Symbols and Layout



How to Identify Transistor's Symbols and Layout



How to Identify Diodes Symbols and Layout



How to Identify Coil Symbols and Layout



How to Identify Integrated Circuit Symbols and Layout



How to Identify DC to DC Voltage Drivers, Regulators and 

Convertes Symbols and Layout


How to Identify EMI-ESD Symbols and Layout



How to Identify RF Filter Symbols and Layout



How to Identify Battery Cell Symbols and Layout



How to Identify Power Switch , Mouthpiece, Earpiece and Ringtones Speakers User Interface Symbols and Layout



How to Identify Clock Crystal Oscillator Symbols and Layout



How to Identify Fuse Symbol and Layout



How to Identify the Lines and Symbols on Schematic Diagram
LESSON 06

How to Find and Locate Components on PC BoardHow to Solder SMD Components Manually by Hand

How to Reball BGA Chips Manually by Hand

Identifying and Familiarization of Common Mobile Phones Components and Spare Parts
Liquid
Crystal Display LCD's Touch Screen Panels Microphones Micro Speakers
Switches Charging Pins Antenna's Batteries Battery Connectors USB
connectors


Familarization: Components and Parts on Nokia Mobile Phone Handsets
Familarization: Components and Parts on Samsung Mobile Phone Handsets
Familarization: Components and Parts on Sony Ericsson Mobile Phone Handsets
Familarization: Components and Parts on Motorola Mobile Phone Handsets
Familarization: Components and Parts on iPhone Mobile Phone Handsets
Familarization: Components and Parts on Blackberry Mobile Phone Handsets
Familarization: Components and Parts on HTC Mobile Phone Handsets


Understanding Major Integrated Circuits (IC)on Mobile Phones
Power Management IC
Application Processor
Flash IC
RAM IC

Basic Hardware Handling Procedures
Proper Disassembling and Assembling Methods
How to Test Mobile phone Speaker,Buzzer or Ringer
How to Test Mobile phone Microphone or Mouthpiece
How to test Mobile Phone Charger Voltage
How to Test Mobile Phone Vibra Motor
How to check Mobile Phone Battery Voltage
How to test Power ON OFF Switch 

Hardware Troubleshooting Basics

How to Troubleshoot Not Charging Issues
How charging circuit works
No Charging Response
Charger Not Supported
Not Charging
How SIM Circuits works
Insert Sim Card Problem
Invalid Sim Card
How Keypad Circuits Works
How to Map and Trace keypads Lines 
Understanding The LED light Circuits
Explanation on How Audio Circuits work
Mouthpiece
Earpiece
Buzzer
Ringer

Headset
Vibra motor
How LCD Display Circuit Works

Basic Mobile Phones Hardware Repair Techniques

Basic on Software Handling
What is Flashing 
What is Unlocking


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