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