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

FAULT 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