FCT Syllabus for Senior Secondary School. SS 3 Radio TV and Electronics Scheme of Work Federal –Schemeofwork.com
RADIO TV & ELECTRONICS SS 3 FIRST TERM SCHEME
| WEEK | TOPIC/CONTENT | ACTIVITIES |
| 1 | SAFETY PRECAUTION IN TELEVISION WORKSHOP. Power supply. Picture tube. Extra-high voltage section.Components ratings. | The teacher provides working TV set. He also instruct students with adequate guidelines to dismantle the set. He will identify the danger power VI3anode cap, filter capacitor in power section fuse and other safety component ratings. The students follow teacher’s guide to dismantle the TV set and observe the demonstration on the appropriate procedure for identifying the danger points, and all the appropriate practices in handling those danger points on the TV set. |
| 2 | KIRHHOFF’S LAWS Definition of Kirchhoff’s first and second laws. Diagram and algebraic expression of Kirchhoff’s first and second laws. Calculation involving Kirchhoff’s first and second laws. Application of Kirchhoff’s laws. | The teacher ; defines the laws, states their algebraic expression, uses vector diagram to explain the laws, draws a simple circuit to illustrate the laws. The students draw the vector and circuit diagrams and solve numerical problems involving the laws. |
| 3 | FAULT FINDING EQUIPMENTS. Identification, uses, and operations of; Oscilloscope.Signal tracer.Digital frequency counter.Logic probe. | The teacher introduces technique for trouble-shooting in TV set. He lists the common faults in the various stages of a TV receiver, starting with the tuner stage, amplifier stage, video amplifier stage, etc, present trouble-shooting instruments e.g. pattern generator, IF sweep generator, EHT meter, etc, and demonstrate their operations and applications. The students should identify the fault finding equipments, and observe their usage. |
| 4 | RESISTIVE INDUCTIVE CAPACITIVE (RLC) CIRCUITS. Calculation of capacitive reactance.Calculation of inductive reactance.Calculation involving RC circuits.Calculation involving RL, LC, and RLC series circuit and parallel RLC circuits. | The teacher reminds the students of the concepts of reactance, emphasizing the similarities and differences between purely reactive load circuits, and purely resistive load circuits. He also demonstrates the procedures for calculating capacitive reactance, inductive reactance, RC, RL, LC, series RLC. The students ask and answer questions, and participate in the calculations. |
| 5 | FEEDBACK. Concept of feedback.Negative and positive feedbacks and their differences.Advantages of a negative feedback.Effects of a positive feedback on amplifiers, bandwidth noise, gain and distortion. | The teacher explains; negative and positive feedback. Uses circuit diagrams to illustrate types of negative feedback. Demonstrate the effect of positive feedback on amplifiers. Explain the advantages of negative feedback. The students observe the teacher illustrate the various types of feedback and teacher’s demonstration of the effect of feedback on an electronic communication system. |
| 6 | OSCILLATORS AND MULTI-VIBRATORS. Principles of oscillators.Types of oscillators- hartly, colpit, tuned collector, etc.Types of multivibrator (IC555), astable, bistable, mono-stable.Construction of a typical oscillator circuit. | The teacher defines oscillator and multi-vibrator, uses schematic diagram to discuss oscillators in their circuits. Builds simple oscillators and multi-vibrator, and use cathode ray oscilloscope to determine their outputs. The students observe the teacher in the course of explanation and demonstration, and identify oscillators and multi-vibrator units in a complex circuit diagram. They also build simple oscillator and multi-vibrator, and use CRO to check the output. |
| 7 | TELEVISION TRANSMITTER Basic working principles of a TV transmitter.Block diagram of a TV transmitter.Stages of aTV transmitter. | The teacher explains the basic working principles of a TV transmitter, in order to generate the video and audio signals, modulate, amplify and process the signal for transmission. He also displays the chart of the block diagram of a TV transmitter. He uses the block diagram in the chart displayed to explain the functions of each of the stages of a TV transmitter. The students observe the chart, listen to teacher’s explanation, and draws the block diagram. |
| 8 | IMAGE REPRODUCTION IN TV RECEIVER 1. Principles of scanning. 2. Video signal. | The teacher describes with the aid of a sketch or chart, the principles of scanning in a TV receiver. He specifically explains the sequency of movement of electron gum in the cathode ray tube with the aid of live TV set, and how the video signal enters the set through antenna, and follow the circuits to the CRT. The students draw the chart in their notebooks, and listen to teacher’s explanation. |
| 9 | SOUND REPRODUCTION IN TV RECEIVER. Principles of FM detection. | The teacher explains with the aid of block diagram of a TV receiver, how the audio signal is recovered and reproduced. While students draw the audio signal flow chart for the reproduction of the sound signal. |
| 10 | MONOCHROME TV RECEIVER Concept of TV receiver.Application of TV system.Functions and operation of monochrome (B/W) TV receiver. | The teacher explains the basic system of TV receiver, draws block diagram of monochrome TV receiver, displays flow chart for monochrome TV receiver, and explains the operation of each stage of the monochrome TV receiver, starting from the antenna to the tube. While the students take notes on the explanation of TV receiver, draws the block diagram of monochrome TV receiver, and participates actively in activities, while the teacher explains the functions and operations of monochrome TV receiver. |
| 11 | PRINCIPLES OF OPERATION OF COLOR TV RECEIVER. Block diagram of color TV receiver and functions of each stage.Processing of picture and sound signal at different stages of a color TV receiver. | The teacher draws the diagram of color TV receiver, displays the flow chart of color TV receiver, showing different stages, uses the flow chart to explain the functions of each stage of color TV receiver, and applies flow chart and color TV receiver panel. Also, the teacher describes the processing of picture and sound signals at different stages of a color TV receiver, while the students take notes, draw the block diagram of color TV receiver, and observe the teacher’s demonstration with the color TV panel and ask or answer questions where necessary. |
RADIO TV & ELECTRONICS SS 3 SECOND TERM SCHEME
| WEEK | TOPIC/CONTENT | ACTIVITIES |
| 1 | PRINCIPLES OF COLOR SIGNAL TRANSMISSION AND RECEPTION Primary color in TV.Color TV systems and standards;-PAL, SECAM, and NTSC.Color signal components. | The teacher lists and explains the primary color, provides charts on the primary color, and explains it, explains color TV standards and systems;- PAL, NTSC, and SECAM, emphasizes the need for compatibility in color TV system, and explains Q,I,Y and B,G components display chart of color matrix. |
| 2 | DIAGNOSIS AND REPAIR OF BLACK AND WHITE TV RECEIVER. Procedures for TV repairs.Use of service information (mamal) and circuit diagram.Identification of symptoms and repair of fault common to tuner, IF, amp, video amp, CRT, and synchronizing stages.Fault cleaning instruments, e.g signal generator, color- pattern generator etc. | The teacher test for symptoms of a faulty TV set, diagnosis and clears fault common to the tuner IF and other stages in TV set, demonstrates the removal, installation, and adjustments of CRT, demonstrates the setting of presets and non-preset on a TV receiver, and investigates on CRO; synch pulse stage and line time base stage. While the students observe the teacher on; testing symptoms of each stage, diagnosing faults common to all the stages and demonstrates the use of different instruments to clear faults as well as demonstrate the setting of preset and non-presets. |
| 3 | DIAGNOSE AND REPAIR OF A COLOR TV RECEIVER Symptoms of basic fault of a color TV receiver.Fault clearing at each stage of color TV receiver.Static and dynamic color convergence comparison.Color bar generator and signal testing. | The teacher compares and discusses static dynamic color convergence, demonstrates the operation of color bar generator to test signal, demonstrates how to identify symptoms in each stage of color TV receiver, demonstrate with the use of multimeter and CRO, how to clear faults common to each of the stages and test for high voltages, while the students identifies normal operation of a color TV set, identifies symptoms, and clear faults at each stage after observing the teacher demonstrates on how to clear fault at each stage of a color TV and on their own carry out the repair operations demonstrated by the teacher. |
| 4 | BUSINESS MANAGEMENT Accounting practicesCost benefit analysisPurchasing method; accounting ledger, repair order form and inventory sheet. | The teacher explains the basic concept of account balancing, meaning of credit and debit, as applied in business management, and demonstrates how to fill business record appropriately while the students pay attention and take notes. |
