9 parts you have to know to Start cell phone repari bussines

HCQS 9 parts you have to know to Start cell phone repari bussiness



Part 1 : Basic Electronics Declassified:



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



Part 2 : Introduction to Cell Phone Repair



How Cellphone Works

Learning with Block Diagrams

Hardware Repair Techniques

Software Handling

Flashing

Unlocking

software, unlocking, flashing

What is Unlocking, user lock, SPC, MSL, FSC, OTKSL, Flashing

When to use these Terms

GSM unlocking: using codes

GSM Flashing

using software to remove user lock, SPC

what is prl

what is ESN/MEID

Introduction to CDMA software







Part 3: Tools and Test Equipments



Safety Procedures and Proper Handling of Tools and Test Equipments

How To Use and Read a Multimeter Tester

Test and Check up Procedures on Electronics Components

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



Part 4: Schematic Diagrams



How to Read Cellphone's Schematic Diagrams

Identifying Component Symbols and Layout in Schematic Diagram

How to Identify The Follwing:

Resistor's Symbols and Layout

Capacitor's Symbols and Layout

Transistor's Symbols and Layout

Diodes Symbols and Layout

Coil Symbols and Layout

Integrated Circuit Symbols and Layout

DC to DC Voltage Drivers, Regulators

Convertes Symbols and Layout

EMI-ESD Symbols and Layout

RF Filter Symbols and Layout

Battery Cell Symbols and Layout

Power Switch , Mouthpiece, Earpiece and Ringtones Speakers

User Interface Symbols and Layout

Clock Crystal Oscillator Symbols and Layout

Fuse Symbol and Layout

Lines and Symbols on Schematic Diagram



Part 5: SOLDERING, SOLDERING, SOLDERING



How to Find and Locate Components on PC Board

How to Solder SMD Components Manually by Hand

Master soldering on any electric board

BASICS OF SOLDERING

Advantages of Soldering

What is Soldering & de-soldering? Lead free or not?

Hand soldering vs. machine soldering

Electric tools used in soldering: Soldering machines, Hot-Air machines, Pre-heaters, Infrared machines,

Rework stations...etc

Soldering tips & soldering irons

Hand tools & accessories used in soldering: magnifier, tweezers, Fume Extractor , sponges.etc

Chemicals used in soldering: flux, lead, solder wire, flux remover, tin



Part 6: APPLICATION OF SOLDERING IN CELL PHONE REPAIR



Types of circuit boards: PCB solder types and cell phone generations

Which electronic components are found in a cell phone PCB

diode, transceiver, transistor, integrated circuit, 2 point solder joints or 3 joints multi points?

Underfill & under film

Practical basic soldering trainings

Basic and intermediate applications for training

Soldering charging ports

Soldering power buttons

Soldering flex cables

Soldering SIM card trays

Memory modules

Camera modules

Battery sockets

LCD Connector modules

How to Reball BGA Chips Manually by Hand

Identifying and Familiarization of Common Mobile Phones Components and Spare Parts

LCD's Touch Screen Panels Microphones Micro Speakers Switches Charging Pins Antenna's Battery

USB connectors





Part 7: Integrated Circuits



Understanding Major Integrated Circuits (IC) on Mobile Phones

Power Management IC

Application Processor

Flash IC

RAM IC

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



Part 8: LIQUID DAMAGE



Types of liquid damage: Toilet, fresh, salt, food

Tools used in treatment

Chemicals used in treatment



Part 9 : Troubleshooting



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

Understanding How RF circuit works

From :http://www.hcqs.cc/industry-news/industry-news-291.html