Learn/WAEC WASSCE/Syllabus/GSM MaintenanceStudy this course in LearnPractice opens in your WAEC WASSCE workspace after you sign in. Questions and lecture notes stay there.Practice this courseOpen lecture notesOfficial rules, eligibility, and dates stay on the WAEC WASSCE guide.course outlineINTRODUCTION TO MOBILE PHONES AND SERVICE PROVIDERSMobile phones acronyms and terminologies - Definition and terminologiesMobile phones acronyms and terminologies - Included terminologies (GSM, CDMA, MMS, SMS, BSI, DCT, FPS)Mobile phone bands and their uses - Single, double, tri, and quad bandsTypes of mobile phones - Straight, flip, slides and their maintenance needsPhone accessories and their functions - Headsets, earpiece, external Bluetooth, batteries, chargers, cablesTypes of menus and sub-menus - Phone book, message, call, settings, applications and their functionsService providers and their codes - Major voice service providers and service codesBASIC COMPUTER AND INTERNET CONCEPTSIntroduction to computer - Definition, identification, and functions of hardware (monitor, CPU, keyboard) and software componentsIntroduction to internet - Web access platforms (WAP, GPRS, EDGE, Wi-Fi, 3G)Browsing the web - Browsing activities like downloading, uploadingESSENTIAL COMPONENTS OF MOBILE PHONES AND THEIR FUNCTIONSStructure of mobile phones - Basic block diagram (power unit, memory unit, radio unit) and functionsHardware components - Identification, description, and functions (CPU, SIM socket, earpiece, keypad, buzzer, vibrator)Software components - Operating and application softwareMAINTENANCE AND REPAIR OF MOBILE PHONESElectronic components in mobile phones - Resistors, capacitors, diodes, transistors, ICsPreventive maintenance - Definitions, functions, reasons, advantages, and procedures (cleaning, soldering, de-soldering, re-balling)Corrective maintenanceCommon tools and equipment for hardware repairs - Identification and uses (star, Allen key, precision set, multi-meter, oscilloscope, soldering iron, sucker)Common tools and equipment for software repairs - Identification and uses (unlocking software, flashing software, firmware installation)Safety in mobile phone workshop - Safety rules and regulations, safe use of tools, basic safety facilities (first aid box, fire extinguishers)Common hardware problems - Identification (damaged screen, charging ports, mouthpiece, earpiece, keyboard)Common software problems - Identification ('contact service provider', 'phone lock code', 'invalid SIM', 'SIM card rejected')TROUBLE-SHOOTINGBasic trouble-shooting - Dissembling, assembling, testing, and trouble-shooting components (displays, speakers, vibrators, ringers, charging ports, batteries, keypads)Basic trouble-shooting - Fault finding using mobile phone menusBasic trouble-shooting - Identification of mobile phone ICs and electronic componentsBasic trouble-shooting - Reading of PCB circuit layout and schematic diagramsTracing and fault finding in hardware - Identification of faulty components (visuals, continuity test, open/short circuit)Tracing and fault finding in hardware - Test voltages on PCB (voltage levels, IC pin specifications)Tracing and fault finding in hardware - Trouble-shooting techniques (metering, signal tracing/injection, component testing, visual inspections)Tracing and fault finding in hardware - Trouble-shooting Surface Mount Devices (SMD) and Ball Grid Array (BGA)Fault finding in software - Use of software codes and identifying software-related faults (SIM locked, SIM rejected, hanging problem, restart problem)Fault finding in software - Flashing of mobile phones (flashing devices, flashing software, and their uses)Fault finding in software - Phone lock, security unlocking, and resetting countersSETTING UP AND MANAGING MOBILE PHONE WORKSHOPSetting up a mobile phone workshop - Capital, personnel, and factors determining choice of locationFacilities and equipment for mobile phone workshop - Identification of appropriate facilities and equipmentManaging a mobile phone business - Risk analyses, costing, return on investment
