Course Contents

Part 1 : 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 2: 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 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

 

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