CELLPHONE CHIPLEVEL SERVICE TRAINING.

SECTION- 1
Introduction

• What is Cellphone? And it’s working function
• Various Cellphone manufacturers-Samsung, LG, Sony, Moto, Oppo, Vivo, Redmi and etc…,
• Types of Cellphone network
• Various models of cell Phone – Keypad Cellphone and Touch Screen Cellphone
• Types of cell Phone Service: Hardware service, Board Level service and software service
• Difference between hardware and board level service
• Specification of latest Smartphone
• Types of cell phone network : 3G,4G,and 5G

SECTION- 2
CellPhone Service Tools and Testing Equipments

• Screw driver kit
• Cell phone case opener
• Lcd cleaning solution
• Tweezers set
• PCB cleaner IPA solution
• Glue cleaner
• Motherboard holder
• Magnifying lenz
• Android boot cable
• DC power supply
• Digital multimeter
• Micro soldering iron
• Solder lead,wick and paste
• SMD Rework station
• Jumper wire
• LCD extractor tool and etc..,
  

SECTION- 3
SmartPhone Disassembling and Assembling Practical-1

• Complete dismantling Smartphone all parts one by one
• All parts name and identification
  • LCD screen and touch pad with frame
  • Antenna connector
  • Ear piece, Mic and Loud speaker
  • Vibrator motor
  • Battery
  • Front and back camera
  • Charge connector board- CC
  • Cellphone motherboard and etc…,
    

SECTION- 4
Smart Phone Disassembling and Assembling Practical-2

• Complete dismantling Smartphone all parts one by one for any model : Samsung, Redmi, Oppo or other model
• All parts name and identification
  

SECTION- 5
SmartPhone battery & Adapter troubleshooting

• Cell phone power dead or battery not charging problem
• What is battery? And its types
• Battery pin-outs name
• Various Battery voltage and current rating
• How check battery voltage?
• How boost battery voltage?
• what is AC adapter and its connector types
• AC power adapter volt and ampere rating and its checking
• Various types of charger and its pin outs
  

SECTION- 6
Smartphone Earpiece, Loud speaker and Mic troubleshooting

• Cell phone incoming or outgoing sound failure problem
• What is earpiece and loud speaker?
• Various types of earpiece and loud speaker
• Loud speaker, earpiece and its checking – practical
• what is microphone and its types
• Microphone and it’s checking – practical

SECTION- 7
Chiplevel – SMT Electronics Components

• What is current, voltage?
• Different between AC and DC current
• Electrical unit –Ampere, Volt, Watt, Mah
• What is Multimeter and its Complete Usage Method
• What is Polarity? Positive and Negative Difference
• What is Phase, Neutral and Earth?
• Series and Parallel Circuit Difference
• Types of SMD components : Passive and Active
• Passive Components : Resistor, Fuse, Inductor, Crystal Oscillator
• Active Components: Diode, Transistor, Mosfet, IC’S
  

SECTION- 8
SMD Resistor

• SMD resistor identification for Cellphone board
• What is resistor and its function?
• SMD resistor marking code and value measurements
• SMD resistor checking through multimeter
• SMD fusible resistor checking method
• SMD current sense resistor checking method
• What is smd fuse/and its checking method
• SMD resistor soldering practice
  

SECTION- 9
SMD Capacitor

• SMD capacitor identification for cell phone board
• What are capacitor and its function?
• SMD polarity capacitor marking code and value measurements
• SMD capacitor checking through multimeter
• SMD ceramic capacitor checking method
• SMD capacitor ground short checking method
• SMD capacitor soldering practice

SECTION- 10
SMD Inductor and Crystal Oscillator

• SMD inductor identification for cell phone board
• What are inductor and its function?
• Various types of SMD inductor for cellphone motherboard
• SMD inductor checking through multimeter
• SMD inductor ground short checking method
• SMD inductor soldering practice
• What is SMD crystal oscillator and its function
• Crystal oscillator value and checking method
• SMD crystal oscillator soldering practice

SECTION- 11
SMD IC’S or Chip [Integrated Circuits]

• What is ic’s and its general function?
• Various packages of IC’S
• What is inside of IC’S? and its fabrication
• SMD ball IC and its pin out finding method
• SMD pin IC’S and its pin outs finding method
• Various IC’S finding in cellphone motherboard
• SMD ball IC removing and Refixing method through hot air blower
• SMD pin IC removing and Refixing method through hot air blower
  

SECTION- 12
SmartPhone Motherboard

• What is Cellphone motherboard and its general function explain?
• Cellphone functional block diagram explain
• Various parts of cellphone motherboard and its name
• Various section of cellphone motherboard :
  • Power section
  • Charging section
  • RF network section
  • CPU section
  • Memory section ram and rom
  • EMMC section
  • Sensor section
  • LCD display and touch sensor section
  • Simcard section
  • Led backlight section
  • Audio section
  • Camera section
  • Software section
  • Jumper setting section

SECTION- 13
CellPhone Power Section Troubleshooting

• Dead power Cell phone problem, power circuit tracing and troubleshooting
• How power circuit work for cell phone motherboard?
• Power circuit functional block diagram explain
• Power management IC pin out explain
• Power on switch circuit troubleshooting tips
• Power switch soldering practice
• How to find board dead or working through boot cable
• Power IC PMIC soldering practical
  

SECTION- 14
CellPhone Charging Section

• Cellphone battery charging failure problem
• Charging circuit functional block diagram and its explain
• Charging circuit components and its checking
• Charging circuit tracing and troubleshooting tips
• Battery charging circuit half short and full short finding method
• Charging power circuit checking through DC power supply equipment
• Charging chip soldering practical
• Charging connector soldering practical

SECTION- 15
Cell Phone RF network section

• Incoming and outgoing failure problem
• How Cell phone RF section work?
• RF section functional block diagram and its function
• Rf section components checking method
• Earpiece and speaker circuit tracing and troubleshooting tips
• RF ic soldering practical
• Insert sim problem
• Simcard pin outs details explain
• Sim card circuit fault finding

SECTION- 16
CPU and Memory Section

• Cellphone hanging, randomly rebooting problem
• What is CPU and its types?
• Various brands of CPU : qualcomm, mediate, ARM cortex
• What is Ram and rom and its function
• CPU and memory circuit components checking practical
• CPU ic dry soldering method
• What is emmc ic and its function
• Various types of emmc chip interface
• Emmc ic dry soldering or removing practical
• Emmc ic reballing method

SECTION- 17
LCD Screen and Touch Screen Section

• No display ,half screen, white screen, black screen and broken display problem
• What is LCD screen and its types?
• Various sizes of LCD screen
• LCD screen connector circuit components checking method
• How to replace LCD screen from cellphone through LCD separator?
• Touch screen problem solution
• How remove and fix LCD screen connector

SECTION- 18
Led Backlight and Audio Section

• Black screen problem but screen signal ok
• LED backlight circuit functional block diagram
• LED backlight IC circuit tracing and troubleshooting tips
• No sound or less sound problem
• How to check Speaker and Mic circuit components
• Voltage checking for audio circuit
• LED backlight IC soldering practical
  

SECTION- 19
Jumper Setting and Secret Code

• What is jumpering and its required materials
• No incoming sound failure problem: earpiece or speaker jumper method
• No outgoing sound problem: Mic Jumpering Method
• Charging fail Jumper method
• What is Secret codes? How to use?
• Samsung secret code list
• Redmi and other model secret code lists
  

SECTION- 20
Smartphone Software Problem and its Solution

• Cellphone hanging problem, not booting problem, not power on cellphone and rebooting problem
• How to hard reset for various smartphone?
• How to update software for smartphone through odin mode?
• How to download firmware from internet?