9. Principle of Black and White/Colour television: C.R.T. concept of
scanning, formation of picture, synchronization. Block diagram of
Television. Preparing individual charts.
10. Principle and method of tuning of T.V. receiver (B/W, colour).
11. Tuning and adjustment of T.V.
12. Installation of T.V. antenna :- Dipole, dish difference in transmitting
and receiving antenna in terms of action and efficiency.
13. Telephone – Locating fault, socket connections, working principles.
Laboratory equipment required ;
Chart of symbols and units, colour charts. Demonstration board
containing various accessories, voltmeter, battery/cell wires, digital
multimeter, connecting wires, resistance of assorted values and other
passive
components.
e.g.
resistor,
capacitor,
inductors,
active
components, tube devices, semi conductors, soldering iron, soldering
wire, flux, cutter, sand paper, PCB, tools, ammeter, voltmeter, dry cells,
power supply, rheostat , connecting wire, amplifier, transformer, spares
of transformer tools, all electronic devices which are taken in the activity.
Qualification of the teacher :
Teacher with a B.Sc (Hons) in Electronics or B.Sc with Electronics as a
subject or an equivalent Diploma from a recognized university or institute
is eligible.
Product outcome:
Repaired electronic devices and record file will be produced. Other
electronic devices will be made in the class.
Record work :
A proper file should be maintained to record circuits, diagrams and
experiments. The entire theoretical aspects of electronic devices studied
should be recorded.
Evaluation :
The electronic devices file should be evaluated from time to time and
grading done as per CBSE grading system. The working efficiency of the
student in the laboratory should also be assessed and grading done.
Final evaluation should be on the overall working and file work.
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