Part B: Vocational Skills
- Unit 1: Basic Occupational Safety and Precautions
- Unit 2: Microphones and Loudspeakers
- Unit 3: Recorders
- Unit 4: TV System
- Unit 5: Modern Appliances
1. Basic Occupational Safety and Precautions
2. Microphones and Loudspeakers
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Construction, working principle and frequency response of Carbon Microphone, Variable Reactance Microphone, Capacitance Microphone, Piezo-Electric Microphone, Moving Coil Microphone.
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Frequency ranges of musical instruments, Intensity and Dynamic Range, Constructions and working principles of Moving Coil Loudspeaker, Impedance and Power Level of loudspeaker, Frequency characteristics of Practical Loudspeakers: Woofer, Tweeter, Squawker, and Loudspeaker Enclosure.
3. Recorders
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Analog and digital sound recording, Disk recording and reproduction, working principle with block diagram of disk recording and reproduction.
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Principle of magnetic recording and playback, Requirement of bias,Working principle with block diagram of a tape recorder system.
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Principle of optical recording, CD/ DVD manufacturing and recording, CD/ DVD player system, Advantages/ Disadvantages.
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Steps for Fault finding & Analysis.
4. TV System
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Working principle with block diagram of TV transmitter and receiver, Brief description with circuit diagram: TV Tuner, Video IF stage, Sound stage, Picture tube & its associated circuit, Synchronizing circuits, Horizontal & vertical deflection circuits, Remote control of a TV receiver, Idea of bandwidth, blanking and synchronization pulses, modulation scheme, monochrome system, extension of colour transmission.
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Channel and cable type TV system, Head end processor, Trunk & cable distribution system with block diagram, Scrambling.
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Introduction to LCD and LED TV systems, Introduction to high definition systems.
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Steps for Fault finding & Analysis.
5. Modern Appliances
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Working principle and block diagram of following: Microwave oven, Telephone, Fax machine, Printers, Scanners.
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Steps for Fault finding & Analysis.
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