RADIO, TELEVISION AND ELECTRONICS WORKS
WAEC SYLLABUS ON RADIO, TELEVISION AND ELECTRONICS WORKS
PREAMBLE:
This examination syllabus evolved from the Senior Secondary School curriculum forTrade Subjects. It is intended to give candidates insight into the world of Radio,Television and Electronics Works; improve their attitude towards the maintenance andrepairs of radio, television and electronic equipment and enable them to appreciate therelationship between science and technology.
OBJECTIVE
The objective of the syllabus is to test the candidates’ knowledge and understanding ofthe following:(i) Workshop Safety Rules and Regulations;
(ii) Basic Electricity;
(iii) Electronic Tools and Instruments;
(iv) Electronic Devices and Circuits;
(v) Electronic Communication Systems;
(vi) Workshop Practice and Maintenance;
(vii) Entrepreneurship in Radio, Television and Electronics Works.
EXAMINATION SCHEME
There will be three papers, Papers 1, 2 and 3, all of which must be taken. Papers 1 and 2 shall bea composite paper to be taken at one sitting.
PAPER 1:
will consist of forty multiple-choice objective questions, all of which are to beanswered in 45 minutes for 40 marks.
PAPER 2:
will consist of six short-structured questions. Candidates will be required to answerany four in 1 hour for 60 marks.PAPER 3:
will be a practical test of 2 hour duration. It will consist of three skill-basedquestions out of which candidates will answer two for 90 marks.A list of materials for the test shall be made available to schools not less than twoweeks before the paper is taken for materials procurement and relevant preparations.
Alternative to Practical Work:
Alternatively, in the event that materials for the actual practical test cannot beacquired the Council may consider testing theoretically, candidates’ level ofacquisition of the practical skills prescribed in the syllabus. For this alternativetest, there will be two compulsory questions to be answered in 2 hours for 100marks.Industrial Attachment:
This should be done by the candidates during the long vacation between theirSS II and SS III course. It will be supervised and assessed by their subjectteachers. It will carry 10 marks.DETAILED SYLLABUS
| TOPIC | CONTENTS | NOTES |
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1. Workshop Safety Rules and Regulations | 1.1 Sources and Prevention of Hazards | Concept of safety Sources of hazards Treatments should include electric shock, damp or wet floor, wrong handling of tools, improper workshop dressing, horse play in theworkshop |
1.2 Safety Checks in Servicing Radio Receiver | Preparation of work areas Capacitor discharges Working on power lines and live circuits Handling of tools | |
1.3 Safety Precautions in Television Workshop | Power supplies in T.V. Picture tube High voltage section Component rating | |
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2. Basic Electricity | 2.1 Structure of matter | Definition and structure of matter Atomic structure |
2.2 Conductors, insulators and semiconductors | Qualitative treatment only - definition and uses | |
2.3 Current, voltage and resistance | Definition, units and symbols of voltage,current and resistance Laws of attraction and repulsion of charges | |
2.4 Electronic components | Identification of components by name, type,graphical symbol, value and rating Treatments should include resistors, capacitors,inductors, diodes, transformers, transistors,integrated circuit etc | |
2.5 Resistors and Capacitors | Graphical symbols, types, values and ratingsColour code of resistors and capacitors. Comparison between meter measured andcolour code values. Testing of capacitors | |
2.6 Kirchhoff’s Current and Voltage Laws | Concepts, definitions and calculations | |
2.7 Diodes and Transistors | Types, graphical symbols and structure. Treatments should include testing for diodesand transistor configuration (CC,CE and CB) | |
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2.8 Battery | Graphical symbol of a battery( primary celland secondary cell) and types Testing of battery Treatments should include difference betweenwet and dry cells | |
2.9 Ohm’s law | Definition Symbols and relationship between voltage,current and resistance. Resistors in series and parallel | |
2.10 Electric power | Definition, measurement and calculation | |
2.11 Direct and Alternating Current | Definitions, difference, uses and measurementof d.c. and a.c. | |
2.12 Alternating waveform | Definition and calculation Treatments should include r.m.s., peak, andaverage values, frequency and period in an a.c.waveform | |
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3. Electronic Tools and Instruments | 3.1 Electronic hand tools | Types and uses Treatments should include screw drivers,diagonal cutters, soldering gun, soldering iron,lead sucker or de-soldering tools, pocket knife,stripper and soldering wick |
3.2 Electronic measuring instruments | Identification, uses and operation. Treatments should include voltmeter, ammeter,ohmmeter, multi meter. Basic a.c. and d.c. circuit, measurements ofvoltage, current and resistanceOhmmeter for testing semiconductor devices. Identification of faulty meter. | |
3.3 Fault Finding Equipment | Identification, uses and operation Treatments should include oscilloscope, signaltracer, digital frequency counter, logic probe,TV analyzer | |
4. Electronics Devices and Circuits | 4.1 Meaning of Electronics and Electronic circuit | Definition |
4.2 Concept of emission and photoelectricdevices | Definition and application Treatments should include types of emissione.g. Thermionic, photoelectric, field andsecondary | |
4.3 Semiconductors devices | Semiconductor theory and types Semiconductor diodes Treatment should include rectification,principles of operation, characteristics andapplication | |
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4.4 Power Supply Unit | Principle and operation, schematic diagram. Rectification and types. Filters. Construction of stabilized low d.c. powersupply unit | |
4.5 Amplifiers | Operation, construction and uses of Class A, B,C and AB amplifiers | |
4.6 Resistive, Inductive, Capacitive (RLC)circuits | Quantitative treatments only | |
4.7 Feedback | Concept of feedback Differences between types and theiradvantages Effect of a positive feedback on amplifiers,bandwidth, noise, gain and distortion | |
4.8 Oscillators and Multivibrators | Principle and types of oscillator. Construction of a typical oscillator circuit. Types of multivibrator. Treatments to include astable, bistable andmonostable. | |
We provide educational resources/materials, curriculum guide, syllabus, scheme of work, lesson note & plan, waec, jamb, O-level & advance level GCE lessons/tutorial classes, on various topics, subjects, career, disciplines & department etc. for all the Class of Learners | ||
5. Electronic Communication Systems | 5.1 Electronic Communication Systems | Definition and types Block diagram, operation and function of eachstage Noise |
5.2 Electromagnetic spectrum | Definition and classification Propagation of radio waves Radio frequency band- VLF, LF, MF, HF,VHF,UHF,SHF and EHF Application of frequency range in electroniccommunication – frequency spectrum to beintensified | |
5.3 Transducer | Definition, types and functions Treatments should include loudspeaker,microphone, video camera, video displayunit(cathode ray tube(CRT),Liquid CrystalDisplay(LCD)) | |
5.4 Modulation and demodulation | Definition, principle of operation and types ofmodulation AM and FM waveforms and envelopes Percentage of modulation – modulation indexand modulation factor | |
5.5 Radio transmitter and receiver | Meaning and function of carrier wave in radiocommunication. Definition and types of demodulation | |
5.5 Radio transmitter and receiver | Function(s) and operation Block diagram and function of each stage Types of radio receivers – Tuned RadioReceiver(TRF), super heterodyne receivers(FMand AM) Advantages and disadvantages of each | |
5.6 Selectivity and sensitivity | Definition. Concept and function of tuner in radio receiver. Identification of tuner stage in radio receiver | |
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5.7 Resonant circuit | Definition, types of resonance ( series andparallel) Concept of bandwidth and bandwidth ranges Calculation involving frequency ranges todetermine bandwidth Treatments should include derivation of theformula for resonant frequency | |
5.8 Satellite Communication Systems | Elements and types Transmission and receptionAntenna | |
5.9 Television Transmitter | Working principle Block diagram Stages | |
5.10 Image and Sound Reproduction in TVreceiver | Principle of scanning Video signals Principle of FM detection | |
5.11 Monochrome Television Receiver | Concept of Television Function and operation Application of television system | |
5.12 Principles of operation of Colour | Block diagram and function of each stage Processing of picture and sound signal | |
5.13 Principle of Colour Signal, TransmissionandReception | Primary colours in television Colour television systems and standards –PAL, SECAM and NTSC Colour signal components | |
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6. Workshop Practice and Maintenance | 6.1 Soldering and Desoldering in ElectronicCircuits | Techniques and precautions Types of solder Types of flux – amber resin and NaCl solutions |
6.2 Electronic Repairs | Dismantling and reassembling of power supplyunitin a radio set Dismantling and reassembling RF, IF detector Stages in a radio receiver set AF amplifier circuit Installation and maintenance of a car radio set | |
6.3 Fault finding and repairs in radio receiver | Diagnose fault by using fault finding pieces ofequipment and logical trouble shootingprocedure Components responsible for faults Remedies for the faults Alignment of RF and IF stages of a radio setusingthe necessary equipment and tools | |
6.4 Electronic Measuring Instruments | Use of multimeter Treatments should include measurement of thecorrect value of current, voltage and resistancein active and passive electronic componentsandcircuits | |
6.5 Diagnosis and Repair of Black and WhiteTVReceiver | Procedure for TV repairs Use of service information manual and circuitdiagram Identification of symptoms and repair of faults Fault clearing instruments | |
6.6 Diagnose and Repair of a ColourTelevisionReceiver | Symptoms of faults Fault clearing at each stage Static and dynamic colour convergencecomparison Colour bar generator and signal testing | |
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7. Entrepreneurship in Radio, TelevisionandElectronic Works | 7.1 Business Management and Finance | Accounting practices Cost benefit analysis Purchasing method Business records(Accounting ledger, Repair order form, Inventory sheet) Sources of capital e.g. Banks and Credit Unions |
7.2 Customer Relations | Daily appearance at work Customer psychology Working relations Telephone courtesy | |
7.3 Business Opportunities in Radio, TV andElectronics works | Business Opportunities in Radio and TV Work Satellite installation Electronic specialist Radio and TV consultant Radio and TV technician Sales and Service Craft man Antenna and TV installation work | |
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LIST OF FACILITIES AND MAJOR EQUIPMENT/MATERIALS REQUIRED
(1) Screw drivers(2) Diagonal cutters
(3) Soldering gun,iron and lead
(4) Desoldering tools
(5) Pocket knife
(6) Stripper
(7) Semiconductor diodes
(8) Digital and analog multimeters
(9) Loudspeaker, microphone
(10) Cathode Ray Tube/LCD
We provide educational resources/materials, curriculum guide, syllabus, scheme of work, lesson note & plan, waec, jamb, O-level & advance level GCE lessons/tutorial classes, on various topics, subjects, career, disciplines & department etc. for all the Class of Learners
(12) Old electronics panel
(13) Resistors, capacitors, inductors, transistors
(14) Vero board/breadboard
(15) D.C. power supplies
(16) Transformers
(17) Radio and television sets
(18) Oscilloscope
(19) Signal generator
(20) Magnifying glass
(21) Pattern generator (TV)