Computer Hardware and GSM Repairs - SS 3 Class
First Term Material
Lesson 1 --
GSM POWER SECTION
WHAT DOES "GSM POWER SECTION" MEAN? GSM stands for Global System for Mobile Communications, which is simply the standard technology that allows mobile phones to make calls, send texts, and connect to networks. Every GSM phone, whether a basic Nokia-type handset or a modern Android smartphone, needs electrical power to function. The part of the phone's circuit board responsible for receiving, managing, and distributing this power is called the power section... Click here for the complete note
Lesson 2 --
Advanced Diagnostic Tools
WHY BASIC TESTING TOOLS ARE NOT ALWAYS ENOUGH- Most students are already familiar with the analogue or digital multimeter, which measures voltage, current, and resistance as fixed numbers at a single moment. This works well for checking whether a component has failed completely, such as a burnt resistor or a dead battery... Click here to get the complete note
Lesson 3 --
GSM Schematic Diagrams - Reading and interpretation
WHY SCHEMATIC DIAGRAMS MATTER: A mobile phone may look like a single sealed unit, but internally it is a network of dozens of interconnected circuits: power management, charging, audio, display, network, and memory sections, among others. When a phone develops a fault, such as failing to charge or losing network signal, the fault could originate from any point along a chain of components... Click here to get the complete note
Lesson 4 --
Micro Soldering TechniquesWHAT MICRO SOLDERING MEANS: Ordinary soldering, which many students already know from basic electronics practicals, involves joining wires or component legs using melted solder, usually on components large enough to see and handle comfortably. Micro soldering is a more specialised version of the same idea, but applied to extremely small components found on modern circuit boards, such as those inside smartphones, laptops, game consoles, and small household electronics... Click here for the complete note
UNDERSTANDING IP ADDRESSING: Every device connected to a network needs a unique identity, much like every house on a street needs a distinct number for postal workers to deliver letters correctly. This identity, in networking terms, is called an Internet Protocol (IP) address. An IP address is a set of numbers assigned to a device — a computer, phone, printer, or router — so that other devices on the network can locate it and send data to it. Without this addressing system, a network would be like a classroom where every student answers to the same name; instructions meant for one person would confuse everybody... Click here for the complete note