· Web viewData sheet referring, Interface Handling and estimating Important pertinent Content...

Tertiary and Vocational Education Commission

National Competency Standards and Curriculum

For

Electronic Appliances Technician–NVQ Level 4

Course synopsisThis course is designed to introduce the competencies required repair and install consumer electronic appliances. It covers competencies required to repair devices such as LED/LCD TVs, audio and video equipment, wireless communication devices etc. and installation of Audio Video system and satellite receiver (TVRO)

Course Title Course DurationElectronic Appliances Technician Institutional training 1320hrs+ 6months

OJTJob outlook, objectives of the course and career paths available following completion of the course

Electronic Appliances Technician is a person who repair and install consumer electronic appliances such as LED/LCD TVs, audio and video equipment, wireless communication devices. He/she can perform installation of Audio Video system and satellite receiver (TVRO). There is a high demand for this occupation both locally and abroad.

Those who competent in following competency modules can start their own business or can work in a local or foreign industry as Electronic Appliances Technician.

Competence-based modules to be covered:1. Occupational Safety and Health2. Basic Electricity3. Basic Electronic4. Measure values of electronic components5. Information Technology6. Test and replace electronic components7. Digital Electronic8. Operational amplifiers and applications9. Diagnose faults in electronic appliances10. Repair power supply11. Repair Amplifier Stage12. Repair Main System Board13. Repair optical devices and sensors14. Rectify software issues15. Repair/Replace wireless communication devices16. Install Audio Video system17. Install satellite receiver (TVRO)18. Perform network configuration19. Repair display devices20. Interact with customer21. Prepare estimates for repair/service22. Building career skills

Electronic Appliances Technician – NVQ Level 4

Module no.

Module name Duration (hrs.)

01. Occupational Safety and Health 3002. Basic Electricity 3003. Basic Electronic 6004 Measure values of electronic components 20005. Information Technology 3006 Test and replace electronic components 16007. Digital Electronic 3008. Operational amplifiers and applications 3009. Diagnose faults in electronic appliances 6010. Repair power supply 6011. Repair Amplifier Stage 9012. Repair Main System Board 9013. Repair optical devices and sensors 6014. Rectify software issues 6015. Repair/Replace wireless communication devices 3016. Install Audio Video system 3017. Install satellite receiver (TVRO) 6018. Perform network configuration 3019. Repair display devices 6020. Interact with customer 2021. Prepare estimates for repair/service 3022. Building career skills 120

Total time duration(Hours) 1380

Electronic Appliances Technician –Level 4

Module Title and Code: Module 01: Occupational Safety and HealthTime Frame: 30 hours

Reference to NCS: See Competency ProfileCompetencies (job functions and soft skills) and descriptions:

At the end of this module student should be able to1. Use personal protective equipment2. Identify warning signs3. Identify possible electrical hazardous places4. Avoid solder fumes5. Follow waste disposal methods6. Use appropriate fire extinguishers7. Follow safety rules and regulations8. Use Material Safety Data Sheet(MSDS)9. Use proper electrical isolation methods10. Follow first aid for electrocution11. Use precautions for rays and laser radiations from the optical unit

Typical related work situations to master:hours

Adhere to OSH practices

Important pertinent Content (knowledge):

Personal Protective Equipment Safety symbols Fire safety Electrical safety Handling heavy objects and tools High voltage handling tools, equipment and

component Static charges handling methods Protection from rays(laser, X-ray etc) Handling of chemicals Disposal of electronic components and equipment Environmental rules and regulations First Aid

Potentially useful teaching methods (optional):

Assignments Lectures Demonstration Guided practice/Group work Individual practice Presentation


Module Title and Code: Module 02: Basic ElectricityTime Frame: 30hrs


At the end of this module student should be able to1. Identify the

Characteristics of Single phase and Three phase AC & DC Voltage & Current

2. Perform basic electrical circuit wiring with protective devices

Typical related work situations to master: Wiring of basic Electrical Circuit according to BS Standard


Introduction to Power Generation Transmission & Distribution Single phase and Three phase AC & DC Voltage & Current Basic Electrical Circuit wiring and Protection

devices Introduction to British Standards(BS)


Lectures Demonstration Guided practice/Group work Individual practice Presentation


Module Title and Code: Module 03: Basic ElectronicTime Frame: 60 hours


At the end of this module student should be able to1. Identify electronic components and related symbols2. Identify electronic equipment and tool

Typical related work situations to master:hours Identification of electronic components and tools Identification of electronic equipment


Electronic components (Types, characteristics and symbols)

SMD & Normal Resistor Capacitor Diodes Inductors Transformers Transistors Thermistor Relay(Mechanical and Solid state) FET Thyristors Photodiode Photo SCR OptoCoupler Crystal oscillators and filters ICs and Processors

Equipment Clip on Meter Multimeter (Analogue/Digital) Oscilloscope (Analogue/Digital) PC based measuring interfaces Logic Probe Logic IC tester Frequency counter Transistor onboard checker/analyzer RLC Meter Function Generator RS232 Communicators and software Bios and flash memory programmer Temperature/Over heat meter

(Thermometer) Power supply tester


Lectures Demonstration Guided practice/Group work Individual practice Presentation Assignments


Module Title and Code: Module 04: Measure values of electronic components

Time Frame: 200hrsReference to NCS: See Competency ProfileCompetencies (job functions and soft skills) and descriptions:

At the end of this module student should be able to1. Read Electrical and Electronic Symbols2. Read resistor value using standard codes with E series3. Measure resistance using analog/digital Multimeter and replace if required4. Measure current using analog/digital Multimeter5. Measure voltage using analog/digital Multimeter (AC/DC)6. Measure SMD resistor using standard coding7. Read capacitor values using standard codes8. Read capacitors using standard numerical codes9. Read SMD capacitors using manufacture’s codes10. Measure/check capacitor using Multimeter(Analog/Digital) and replace if

required11. Read Inductor value using standard codes12. Measure voltage using Oscilloscope (Analog/Digital)13. Measure peak voltage using Oscilloscope (Analog/Digital)14. Calculate frequency using Oscilloscope (Analog/Digital)15. Measure impedance using RCL bridge (Analog/Digital)16. Measure capacitor value using RCL bridge (Analog/Digital) and capacitor meter17. Measure inductors using RCL bridge (Analog/Digital)18. Test continuity using analog/digital Multimeter and rectify fault19. Test and measure thermistor using analog/digital Multimeter and replace if

required20. Test and measure clock signal and data pulses using Oscilloscope21. Measure clock pulse frequency and amplitude measurements22. Measure and check crystal oscillators and replace if required23. Carry out soldering and de-soldering activities

Typical related work situations to master: Use measuring equipment and measure values of electronic components Soldering practice


Symbols, Codes, data sheet and schematic diagrams Measuring equipment and tools Service manual Manufacture rated data for commonly used electronic

components (Refer Module 03)Potentially useful teaching methods (optional):



Module Title and Code: Module 05: Information Technology

Time Frame: 30 hoursReference to NCS: See Competency ProfileCompetencies (job functions and soft skills) and descriptions:

At the end of this module student should be able to1. Use Microsoft Office package2. Use Internet for download software3. Use Electronic circuit simulation and calculation using software4. Perform Data sheet referring5. Perform Interface Handling

Typical related work situations to master: Data sheet referring, Interface Handling and estimating


MS Office Internet for download software and manuals Electronic simulation, calculation software Data sheet referring Interface Handling


Practical at IT laboratory Assignments


Module Title and Code: Module 06: Test and replace electronic componentsTime Frame: 160hrs


At the end of this module student should be able to1. Check bridge rectifier, dual rectifier and rectifier diodes and replace if required2. Check signal diode using analog/digital Multimeter and replace if required3. Test LED using analog/digital Multimeter and replace if required4. Test Zener diode and replace if required and replace if required5. Test varicap diode using analog/digital Multimeter and replace if required6. Test NPN/PNP transistor and replace if required7. Test low frequency range transistors using analog/digital Multimeter and replace

if required8. Test high frequency range transistors using analog/digital Multimeter and replace

if required9. Test power transistor using analogue/digital Multimeter and replace if required10. Test junction FET transistor (N Chanel / P Chanel) and replace if required11. Check MOSFET using analog/digital Multimeter and replace if required12. Check SCR using analog/digital Multimeter and replace if required13. Check triac using analog/digital Multimeter and replace if required14. Check photo diode using analog/digital Multimeter and replace if required15. Check photo transistor using analog/digital ultimeter and replace if required16. Check photo SCR using analog/digital Multimeter and replace if required17. Check photo triac using analog/digital Multimeter and replace if required18. Check Opto couplers using analog/digital Multimeter and replace if required19. Check transformers using analog/digital Multimeter and replace if required20. Check IC using Multimeter and oscilloscope and replace if required21. Check relay using Multimeter and replace if required22. Read data sheets of transistors, diodes, rectifiers and other semi-conductor

devices using internet

Typical related work situations to master: Identification and replacing of above component


Symbols, Codes, data sheet and schematic diagrams Measuring equipment and tools Service manual Manufacture rated data for commonly used electronic

components (Refer Module 03)Potentially useful teaching methods (optional):



Module Title and Code: Module07: Digital Electronic


At the end of this module student should be able to1. Familiar with logic circuits

Typical related work situations to master: Test logic gates (TTL, CMOS) Develop combinational logic circuits Develop flip-flop using NAND and NOR gates Develop adder/subtractor circuits Develop BCD counter Develop ADC and DAC convertor


Introduction to digital signals(TTL, CMOS, Logic families)

Numbering system Boolean Algebra(Basic laws and Theorem) Logic gates Combination logic Sequential logic Memory cell Seven Segment Display (SSD) applications Converters(ADC and DAC)


Lectures Demonstration Assignment (Mini project)- Implementation of a

selected project using logic


Module Title and Code: Module08: Operational amplifiers and applications


At the end of this module student should be able to1. Develop different types of operational amplifier circuits

Typical related work situations to master: Develop inverting/ non inverting amplifiers Develop comparators Develop summing (mixer), differential amplifier circuit Develop filters Develop instrumentation amplifiers


Types of amplifiers Comparative amplifiers

o Triggerso Schmitt triggero Comparator

Non Comparative amplifierso Inverting and non-invertingo Buffero Summing

Filters and Oscillators Filters

o Low passo High passo Band pass

Oscillatorso RCo LCo Colpitts


Lectures Demonstration Assignment – implementation of practical

oscillator by using Op amp


Module Title and Code: Module09: Diagnose faults in electronic appliances


At the end of this module student should be able to1. Gather information from the customer2. Check the existing condition of the appliances3. Clean, service and resold dry joints4. Perform troubleshooting process5. Identify and list out defective components and parts6. List out suspicious components and parts

Typical related work situations to master:

Diagnosing of faults in different electronic circuitImportant pertinent Content (knowledge):

Trouble shooting guides and methods Diagrams and service manuals Communicate with customer


Lectures Demonstration Guided practice/Group work Individual practice Role plays


Module Title and Code: Module10: Repair power supply unit

Time Frame: 60 hrsReference to NCS: See Competency ProfileCompetencies (job functions and soft skills) and descriptions:

At the end of this module student should be able to1. Check and repair AC input filtering stage2. Check and Repair voltage rectification stage3. Check and Repair regulatory stage4. Check and Repair DC conversion stage5. Check and Repair output stage6. Check and Repair control and feedback stage7. Refer power switching and control IC data sheets and check using oscilloscope

Typical related work situations to master: an Repair faults in different types of power supply units


Type of power supply Linear SMPS Direct (Transformer less) Inverter power supply (Step up and step

down) Power codes Fuses and protection (AC) Filters Smoothing’s Power supply oscillators Regulation Methods

Zener diode IC regulators Transistor series Transistor shunt

Protection Over Voltage Protection(OVP) and Over

Load/Current Protection(OLP) Short Circuit (SCP) Zener diode Transistor SCR


Lectures Demonstration Guided practice/Group work Individual practice Presentation Assignment


Module Title and Code: Module 11: Repair Amplifier StageTime Frame: 90 hrs


At the end of this module student should be able to1. Repair pre amplifier stage2. Repair digital signal processing stage3. Repair output driving stage4. Repair DA (Digital to Analog) processing stage5. Repair digital amplifier stage6. Repair sound drivers/speakers stage7. Refer relevant control IC data sheets and check using oscilloscope

Typical related work situations to master: Repair faults in different types of amplifiers


Types of amplifiers Class A Class B Class C Class AB Class D Transistor differential

Transducers


Lectures Demonstration Guided practice/Group work Individual practice Presentation Assignment: Design a class D subwoofer amplifier


Module Title and Code: Module12: Repair Main Control BoardTime Frame: 90 hrs

Reference to NCS: See Competency ProfileCompetencies (job functions and soft skills) and descriptions: At the end of this module student should be able to

1. Repair/replace signal input and output stages2. Repair signal input selection stage3. Repair timing control signal and pulse4. Repair signal processing stage (SOC, DSP and other processers)5. Repair memory and storage devices6. Repair driver and output stage7. Repair input-output protection circuits8. Repair power and power protection circuits9. Repair control and communication circuits10. Refer relevant control IC data sheets and check using oscilloscope

Typical related work situations to master: Repair different stages and circuits of main control board


Audio, Video, sensor input, data input and output

Input , Output signal sources(HDMI 1.0/2.0/2.4/3.0, USB 1.0/2.0/3.0/3.1/4.0,WiFi WLAN , VGA, Bluetooth, CVBS, optical, IR, RF)

Input , Output signal standards (Audio, Video, Communication – Ex. MPEG4, HAVC, H264, H265, I2C, UART)

Resolution, frame rate, bit rate and file type Optical data reading Motherboard block diagram and identify

sections Input Output switching and controllers HDMI/VGA/USB switching Sensors and actuator interfacing Motor driver controllers(Stepper, servo) Voltage distribution section (Regulators and ICs) PCB layers and assemble Amplifier and circuits Basic processor and software knowledge Audio, video, motion enhancement etc. Boot loader, kernel, main firmware,

Configuration settings (HDCP, EDID) etc. Memory ICs , Memory circuit and digital

controls Biosand programming




Module Title and Code: Module 13: Repair optical devices and sensorsTime Frame: 60 hr

Reference to NCS: See Competency ProfileCompetencies (job functions and soft skills) and descriptions: At the end of this module student should be able to

1. Clean optical lenses and photo sensors2. Replace optical assembly and photo devices3. Remove safety solder points and protection devices4. Adjust photo sensors and optical devices5. Replace motors and other mechanical parts6. Adjust mechanical timing7. Replace and adjust motion detect switch and sensors8. Replace/repair servo control IC or circuit9. Replace processor ICs10. Upgrade firmware or factory reset11. Final testing and refer relevant manufacture details

Typical related work situations to master: Repair devices and sensors


Introduction to storage devices(CD, DVD,BD, 3D Blue Ray)

Block diagram of DVD/VCD /Blue ray(BD) players Describe each block Optical reading methods(focusing, tracking, sliding) Timing and mechanical calibration Sensors and switches Servo motor control and mechanical control Digital co-axial cable, digital optical cable




Module Title and Code: Module 14: Rectify software issuesTime Frame: 60hrs

Reference to NCS: See Competency ProfileCompetencies (job functions and soft skills) and descriptions:At the end of this session student should be able to

1. Identify software defects2. Re-install software by USB and online3. Re-install software by memory programmers

Typical related work situations to master: Re-install software by memory programmers, USB and online


Memory ICs EEPROM, Flash memory, EMMC Identify OS and version Upgrade method, precaution, term and

condition Using OFF Line memory/Bios programmer




Module Title and Code: Module 15: Repair/Replace wireless communication devices


At the end of this session student should be able to1. Repair/Replace WIFI unit2. Repair/Replace Bluetooth module3. Repair/Replace IR module

Typical related work situations to master: Repair/replace WIFI, Bluetooth and IR module


Basic knowledge on Data communication Basic knowledge on software and factory mode

configuration




Module Title and Code: Module16: Install Audio Video system

Time Frame: 30hrsReference to NCS: See Competency ProfileCompetencies (job functions and soft skills) and descriptions: At the end of this session student should be able to

1. Identify customer requirement2. Decide most suitable project plan3. Ensure legal and environment requirement4. Asses utility requirement5. Ensure safety requirement6. Install the system7. Check system for proper installation and operation


Install different type of Audio Video systemImportant pertinent Content (knowledge):

Environmental standards Legal requirement Cables and accessories selection Sound level measuring and monitoring Basic sound proofing




Module Title and Code: Module 17: Install satellite receiver (TVRO)Time Frame: 60

Reference to NCS: See Competency ProfileCompetencies (job functions and soft skills) and descriptions: At the end of this session student should be able to

1. Install satellite dish antenna2. Install LNB/LNBF, feeder horn3. Adjust polarization4. Set up the set-top box5. Adjust antenna tracking6. Connect LNBF and set-top box using coaxial cable(50ohms/75ohms) and F- connector7. Connect tracking motors to the system8. Check remote control functions

Typical related work situations to master: Install satellite receiver


Identification of satellite system Satellite in the region Transmission and broadcasting bands(C band and

KU band) Antenna basics and type Polarization and azimuth angle Cable types(50ohms/75ohms)




Module Title and Code: Module18: Perform network configuration

Time Frame: 30hrs


1. Identify customer requirement2. Identify faults in installed system3. Identify faults in customer network4. Identify faults in settings5. Verify connectivity


Perform network configurationImportant pertinent Content (knowledge):

Basics on Data Communication Basic Knowledge of switches, routers and protocol Network speed measurements


Lectures Demonstration Guided practice/Group work Individual practice Presentation Assignment


Module Title and Code: Module19: Repair display devices

Time Frame: 60hs


1. Disassemble and assemble display panel2. Repair/replace LCD panel3. Repair/replace touch panel4. Repair LFD panals(LED/LCD)5. Repair back light section


Repair different types of display devicesImportant pertinent Content (knowledge):

Display types TFT LCD(Open cell/module) LED panel(Module types) OLED

Display components Timing/switching control (T-Con)boards Gate and source driving boards Chip on Film(COF) Chip on Glass(COG) Chip on Array (COA) LVDS data cable Logic data cable LED driver circuit

Back light driver circuit Types of back lights(Edge/Direct LED/

CCFL /QLED) LED convertor LCD invertor


Lectures Demonstration Guided practice/Group work Individual practice Assignment-Industry visit


Module Title and Code: Module20: Prepare estimates for repair/service/ configuration

Time Frame: 20hsReference to NCS: See Competency ProfileCompetencies (job functions and soft skills) and descriptions:At the end of this session student should be able to

1. Identify faults of the equipment/configuration2. Identify required parts, material and equipment3. Calculate the cost for the parts, material and equipment4. Calculate the cost for labour hours5. Calculate overheads and contingency expenses6. Calculate profit margin7. Prepare total estimate8. Obtain customer’s approval



Warranty periods Market prices of parts, material and equipment Overheads and Profits Taxes Prepare quotations Record keeping Approved forms and formats


Prepare an estimate for given repair/service Prepare estimate for given installation and configuration


Module Title and Code: Module21: Interact with customerTime Frame: 18hrs

Reference to NCS: See Competency ProfileCompetencies (job functions and soft skills) and descriptions:At the end of this session student should be able to

1. Information gathered from the customer2. Check and accept the equipment for repair/service3. Handover the equipment after repair / service

Typical related work situations to master:hours Communication with the customer


General principles in interacting with customer Welcome and Greeting Listening skills Work ethics


Role play- Customer handling Industry visit

Resource Persons for development of NCS and Curricula

Mr. P.H. Tharanga Nandika Silva,

Director (Master Control Room), MTV Channels (Pvt) Ltd, P.O. Box. 36, Araliya Uyana,

Depanama, Pannipitya.

Mr. P.W.M. Chaminda Karunatilake,

Electronic Engineer, CK Electronic and Computer Systems, No. 44/1, Old Road, Nawinna,

Maharagama.

Mr. S.P. Kosala Chandimal Jayarathne,

Engineer (Transmission), EAP Broadcasting Company Ltd, No. 676, Galle Road, Colombo 03.

Mr. G.T.Galagedara,

Senior Engineer, Singer PLC, No. 128, N.M. Perera Mawatha, Colombo 08.

Mr. Channa Fernando,

Proprietor, Fernando Electricals, No.391/36, Walawwatta, Ganemulla.

Mr. L.S. Priyankara,

Engineer (Operations), MTV Channels (Pvt) Ltd, P.O. Box. 36, Araliya Uyana, Depanama,

Pannipitya

Mr. U.A. Aquinas Vijith,

Instructor, National Youth Services Council, Akmeemana.

Mr. A.G.Kariyavasam,

Senier Instructor, National Youth Services Council, Maharagama

Mr. S. Nanayakkara,

Instructor, Technical College, Kegalle.

Mr. G.K.R. Pathdmajith,

Training Officer, Vocational Training Authority of Sri Lanka, 352/2 Elvitigala Mawatha,

Narahenpita

Mr. U.Samarasingha,

Vocational Training Authority of Sri Lanka, 352/2 Elvitigala Mawatha, Narahenpita

· Web viewData sheet referring, Interface Handling and estimating Important pertinent Content...

Documents

Transcript of · Web viewData sheet referring, Interface Handling and estimating Important pertinent Content...