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
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