Different Phones Repair Course

INTRODUCTION

Smartphone Repair Course

Our training is divided into three parts:PART I: TheoryPART II: PracticalsPART III: PracticeDuration : 1 Months (25 hours)

COURSE SYLLABUS:

I. Module 1 (Basics)1) Assembling & disassembling of different types of smart phones2) Study of parts of smartphones.3) Testing of various parts with multimeter.II. Module 2 (Hardware Troubleshooting)1) Circuit Board / Motherboard Introduction.2) Replacing of faulty parts.3) Fault finding & troubleshooting.4) Steps of repairing various hardware problems.5) Advanced troubleshooting techniques.III. Module 3 (Software Troubleshooting)1) Introduction of various software faults.2) Flashing of various types of smartphones.3) Upgrading operating systems.4) Formatting of virus affected handsets.5) Unlocking of handsets through codes and software.6) Troubleshooting settings faults.

MOBILE PHONE HARDWARE REPAIRING ( ABOUT FAULTS COMES WITH IC )We can divide all Mobile phone damages as Hardware , Software and Settings faults. when we think about hardware damages or faults mainly we want to know what are the main ICs and faults comes with IC. Old phones had ICs more than latest phones. However when you get complete idea about that ICs then you will be able to find solution for damages in your phone properly. Check following list of ICs and try to understand about that faults.

Power Amp Antenna Switch RF Processor (hagar IC) Power IC CPU Charging IC Flash IC ( ROM or EEPROM) Oscillator (VCO) Sim IC Key Pad IC LCD Light control IC

Power AmpThis is a very important IC for Transmiting signal(Tx) in your phone. This IC is work as a Tx amplifier and it get high voltage directly from the battery. When it is damage we can see following faults.

Different Phones Repair Course

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Signal Drop No Network or Access Battery low quickly Cant make a call ( Tx not work properly ) Power on failure Phone will heat

Antenna SwitchAntenna switch help to filter frequency Bands as 900Mhz , 1800Mhz and connect Rx ,Tx( Receiver and Transmitter). Therefore when this IC is damaged we can see faults as following.

Signal DropNo Network foundSome Frequency band does not work properly

RF Processor ( Hagar IC)RF( Radio Frequency ) Processor is a main IC in your phone PCB. This IC is used for processing Rx and Tx signal ( for Modulating and Demodulating). Sometimes it makes a low frequency clock signal that is used to start CPU functions. Therefore when this IC is damaged we can see faults as following.

Power on failureSignal dropNo networkCaller dropRx or Tx or both are not work properlyHeats up and Battery Easily Drain

Power ICPower IC distribute current to all the components and IC in PCB. We can think that, it works as voltage regulator therefore if it is not working properly the phone will not power on. Sometimes some applications does not work properly because of this Power IC. It happens when the Power IC cannot supply enough power to the circuits. When it happens the following failures may occur.

Power on failure Battery easily drains Phone will heat Insert SIM Not Charging Some applications are not working properly Auto Restart

CPU (Central Process Unit)Central Processing Unit is the brain in your mobile phone and the controller of all commands which we have given. This IC check the flash IC before booting mobile phone after that it will give command to Power IC. When it is damage we can see following faults.

Power on failure Auto Restart Command not accepted KeyPad not working Battery empty Heats up Hang up

Charging ICThis IC is not a common IC among latest phone. However it is used to control the charging of the unit. When it is damaged we can see charging faults like Not Charging , Auto charging or Charger was not supported ( Bad contact charger). Nowadays Power IC ( UEM) is also working as a charging control IC.

Flash IC ( ROM or EEPROM)This IC holds flash or booting information(program). When this IC is damaged we can see software problems in your phone as follow:

Power on failure Booting faults.( only booting screen) Phone Hang Battery easily drains Some applications are not worked( camera ,Mp3,Video Bluetooth ...etc ) Phone work as a unconditional

VCO (Voltage Control Oscillator)VCO is the RF signal generator. It makes clock frequency which is used to run digital components. When this IC is damaged digital components fail to work and the result is power on failure.

Power on failureSignal faults

SIM ICThis IC is used to control the SIM card data. This is the portion of the phone that is easily damaged when dropped. Therefore we can say following faults are common faults in nowadays.

Insert SIMunable to power on with SIM cardSIM not accepted.

Keypad ICThis IC is used to Control Keypad circuit. This IC is crystal type that is why when the phone is dropped it is easily damaged. Therefore we can say following faults are common:

Keypad Malfunction Stuck up Auto dial when switched On Auto restart when pressing any key

LCD LightcontrolICThis IC is used to control keypad and LCD lights. We can see this IC as crystal and normal type. when this is damaged we can see following faults.

Key pad lights not work LCD lights not work White Display Display not work

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