mobile cell phone repair course.part 1

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Introduction

Welcome to this course on mobile cell phone repair and maintenance. A mobile cell
phone is a hand held mobile device that can perform several communication
functions. Mobile technology has become one of the fastest growing technologies in
the world. Today people use mobile phones to stay in touch with friends and family,
to share stories and photographs in social media, and to carry out financial
transactions. Indeed, according to a World Bank policy research paper of 2012, 93%
of Kenyans owned a mobile phone by the end of 2011.

This widespread ownership and use of mobile phones has created a need for
professionals who can repair and service mobile phones. This course has been
developed to address that need. The course targets people who would like to start
and run a mobile repair and servicing business. By the end of this course you should
be able to disassemble and assemble a mobile phone, diagnose the problem, service
and repair a mobile phone with the help of proper tools and instruments.
This course is provided through distance learning and we trust that you will find the
material useful both for studying and as a future reference. We welcome your
feedback on any issue relating to this course and wish you all the best. Happy
Learning!

Learning Outcomes


Upon completion of this course you will be able to:

  • Identify different types of mobile cell phones
  •  Recognise potential hazards in the repair of mobile cell phones
  • Identify the parts of a mobile cell phone
  • Use the correct hardware tools to repair mobile cell phones
  • Assembly and disassembly of a mobile cell phone
  • Identify mobile cell phone faults and solve them.

Abbreviations and Acronyms

3G: 3Rd Generation in Mobile Telephony

AC: Alternate Current.

BGA: Ball Grid Array

 BSI: Battery Status Indicator


CDMA: Code Division Multiple Access

CPU: Central Processing Unit

DCT: Digital Core Technology

DC: Direct Current

ESD: Electro Static Discharge

FM: Frequency Modulation

GSM: Global System For Mobile phones

IC: Integrated Circuit

IMEI: The International Mobile Station Equipment Identity

LCD: Liquid Crystal Device

LED: Light Emitting Diode

MIC: Microphone

PDA: Personal Digital Assistance

PCB: Printed Circuit Board

PFO: Power Frequency Oscillator

RAM: Random Access Memory

RTC: Real Time Clock

SMD: Surface Mount Device

SIM: Subscriber identification module


What is a Mobile Phone?



A mobile phone is a wireless handheld device that allows users to make and receive calls and to send text messages, among other features. The earliest generation of mobile phones could only make and receive calls. Today’s mobile phones, however, are packed with many additional features, such as web browsers, games, cameras, video players and even navigational systems.

A mobile phone may also be known as a cellular phone or simply a cell phone.

When the first mobile phones were introduced, their only function was to make and receive calls, and they were so bulky it was impossible to carry them in a pocket.

Later, mobile phones belonging to the Global System for Mobile Communications (GSM) network became capable of sending and receiving text messages. As these devices evolved, they became smaller and more features were added, such as multimedia messaging service (MMS), which allowed users to send and receive images. Most of these MMS-capable devices were also equipped with cameras, which allowed users to capture photos, add captions, and send them to friends and relatives who also had MMS-capable phones.

A mobile phone with advanced features similar to a computer is called a smartphone, while a regular mobile phone is known as a feature phone.
A mobile phone typically operates on a cellular network, which is composed of cell sites scattered throughout cities, countrysides and even mountainous regions. If a user happens to be located in an area where there is no signal from any cell site belonging to the cellular network provider he or she is subscribed to, calls cannot be placed or received in that location.






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