Tutorials

FREE CELLPHONE REPAIR TUTORIALS

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This is where you can learn a step by step from basic to advance procedure on how to fix major mobile phone handsets problems such as Nokia, iPhone, Blackberry, Samsung, SonyEricsson, Motorola, HTC, Android,LG, Siemens, Benq and etc. for absolutely 100% Free!

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 BasicElectronics

Ohm's Law

Series Circuit

Parallel Circuit

Identifying ElectronicsComponents and Circuit Symbols

Resistors

Capacitors

Transistors

Diodes

Fuse

Coils & Inductors

Crystal Oscillators

RF & IF Amplifiers andFilters

EMI and ESDFilters

LESSON 03

Preparing the Proper Tools ForRepairing

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 ProperHandling of Tools and Test Equipments on Cellphone Repair

How To Use and Read aMultimeter Tester

Test and Check up Procedures on Basic Electronics Components

LESSON 05

Introduction to

Reading Cellphone's SchematicDiagrams

Identifying Component Symbolsand Layout in Schematic Diagram

How to Identify Resistor'sSymbols and Layout

How to Identify Capacitor'sSymbols and Layout

How to Identify Transistor's Symbolsand Layout

How to Identify Diodes Symbolsand Layout

How to Identify Coil Symbolsand Layout

How to Identify IntegratedCircuit Symbols and Layout

How to Identify DC to DCVoltage Drivers, Regulators and

Convertes Symbols and Layout

How to Identify EMI-ESD Symbolsand Layout

How to Identify RF FilterSymbols and Layout

How to Identify Battery CellSymbols and Layout

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

How to Identify Clock CrystalOscillator Symbols and Layout

How to Identify Fuse Symbol andLayout

How to Identify the Lines andSymbols on Schematic Diagram

LESSON 06

HOW TO FIND AND LOCATECOMPONENTS ON PC BOARDHOW TO SOLDER SMD COMPONENTSMANUALLY BY HAND 

HOW TO REBALL BGA CHIPSMANUALLY BY HAND

Identifying and Familiarizationof Common  Mobile Phones Components and Spare Parts

Liquid Crystal Display LCD'sTouch Screen Panels Microphones Micro Speakers Switches Charging Pins Antenna'sBatteries Battery Connectors USB connectors

Familarization: Components andParts on Nokia Mobile Phone Handsets
Familarization: Components andParts on Samsung Mobile Phone Handsets
Familarization: Components andParts on Sony Ericsson Mobile Phone Handsets
Familarization: Components andParts on Motorola Mobile Phone Handsets
Familarization: Components andParts on iPhone Mobile Phone Handsets
Familarization: Components andParts on Blackberry Mobile Phone Handsets
Familarization: Components andParts 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 andAssembling Methods
How to Test Mobile phoneSpeaker,Buzzer or Ringer
How to Test Mobile phoneMicrophone or Mouthpiece
How to test Mobile Phone ChargerVoltage
How to Test Mobile Phone VibraMotor
How to check Mobile PhoneBattery 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 keypadsLines

Understanding The LED lightCircuits

Explanation on How AudioCircuits work

Mouthpiece

Earpiece

Buzzer
Ringer

Headset

Vibra motor

How LCD Display Circuit Works
Understanding How RF circuitworks

Basic Mobile Phones HardwareRepair Techniques

Basic on Software Handling
What is Flashing 
What is Unlocking