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MOBILE SERVICE Training

Module M2 :- MOBILE PHONE REPAIRING CONCEPT OF COMMON MODELS

2.1 ELECTRONICS COMPONENT TESTING IDENTIFY , REPLACING

  • RESISTOR:- Types Used, SMD, Measure
  • CAPACITOR :- Work, Types, Ceramic, Electrolyte,
  • INDUCTOR COIL – Work, Types, Check,
  • TRANSFORMER :- Work, Types, Step up, Step down, SMD, Check
  • DIODE :- Semiconductor, Ntype, Ptype, Work, Types, Testing
  • TRANSISTOR :- Work, Types, NPN, PNP, Testing Method, Used
  • FET,MOSFET :- Work, Types, NPN,PNP, Testing, Single Channel, Dual Channel, Testing, Used
  • OTHER COMPONONET Fuse, CRYSTAL, RTC
  • DIGITAL ELECTRONICS :- Number systems types, Conversion of Number systems
  • LOGIC GATEG :- AND, OR NOT NOR, NAND
  • Study Chip Datasheet and Working Idea of different Chip

2.2 MOBILE PHONE SECTION & FAULTS DETAIL

a) CHARGING SECTION (practical explanation of charging, diagram of charging section, common problem & solution in charging section)
b))ON/OFF POWER SECTION:- ( how mobile start, on/off signals come from, common problems & solution )
c))Dead mobile fault finding :- ( checking pcb, short, open close , offline tracing )
d)) POWER/ UEM SECTION( practical explanation of different power supply to different chip, common problems and solution of power section, work of UEM/ Power, signals convert analog to digital, mixing of rx and tx signals, , common problems and solution of UEM section )
e)) NETWORK SECTION (practical explanation,antenna, antenna contact, external antenna, antenna switch, filter, coupler, uem, rx, tx, PFO, Amp.If ic /hagar diagram, problem, solution, tips)
f)) RAM, FLASH,NAND DATA SECTION(function of RAM , FLASH, NAND chip ,how its work, common problems and solution of ram & flash chip)
g)) SIM SECTION (Different pin of Simcard, memory of sim, Work of simcards, cutting of sim, small sim
h)) AUDIO SECTION(practical explanation of mobile phone audio section , mic speaker, handsfree, etc not work etc, problem and solution of audio section)
i) ) KEYPAD SECTION (Keypad IC, practical explanation, diagram, problem, solution)
j)) DISPLAY SECTION ( practical explanation, diagram, problem, solution)

  • CPU SECTION ( work of cpu , common problem & solution of cpu section )
  • CLOCK, RTC SECTION ( work of clock chip, supply of clock frequency to chip, common problem and solution of clock section)
  • BLUEETOOTH, IRDA,WIFI SECTION( worki of blueetooth , irda, wifi , common problems of blueetooth, irda and wifi section )

2.3 DIFFERENT MOBILE OPENING AND STUDY CIRCUIT WITH DIFFERENT SECTION

  • (nokia, samsung, sony, china, etc)
  • Understanding block diagram of models, different chips, schematic diagram , understanding problem and solution diagram, complains, solution, tips)

2.4 UNDERSTANDING MOBILE PROBLEMS AND SOLUTION WITH FLOW CHART

  • Flow chart of mobile repairing troubleshooting
  • Mobile shorting finding steps
  • Mobile connector shows open circuit
  • Mobile does’t power on
  • Mobile not charging
  • When calling mobile switch off
  • Mobile power on but restart
  • Mobile hang up
  • Mobile power on but no display
  • Mobile phones no network
  • Mobile one band come other not
  • Mobie on but keypad not work
  • Sim not accepted in mobile
  • Sim not valid
  • Insert correct sim
  • Bluee tooth not work
  • WIFI not work

2.5 REPAIRING AND PRACTICE OF MOBILE

  • Step of repairing
  • Cold/ warm testing method
  • Schematic diagram tracing
  • Tools & instrument use demo
  • Micro iron & soldering iron practice,
  • Removing & installing chip
  • socket and connector practice
  • Jack changing (battery connector ,sim, charging, handsfree)
  • Big ic removing practice,
  • Micro iron jumper practice,
  • Jumper practice
  • Ic’s rebolling concept
  • BGA ic removing, rebolling, replacements
  • Driver chip changing
  • PFO/ PA changing
  • Tracing and foult finding
  • Track reading thru circuit diagram
  • Track checking on mobile phone
  • Mobile phone physical testing

2.6 MOBILE PHONES REPAIR TESTING METHOD PRACTICLE

  • NOKIA MODELS
  • SAMSUNG MODELS
  • CHINA MODELS
  • SMARTPHONE SMALL MODELS
  • OTHER MODELS
  • STUDENTS MOBILES
  • NOTE:-(depend on models come on repairing or available )
  • TIPS AND DIAGRAM OF DIFFERENT MODELS, AFTER COURSE YOU MUST HAVE KNOWLEDGE
  • FOULT FINDING STEPS
  • Correction of tracks and jumper techniques
  • Finding shorting on mobile phones
  • Changing module like antenna switch PFO filter ics,
  • Changing of bga chip
  • Changing of smd components
  • Schematic tracing idea

2.7 REVISION & EXAM OF MOBILE HARDWARE