NIOS 604 — TV Repairing

This is a complete, free study companion for NIOS 604 — TV Repairing — built around what the exam actually asks. The topics examiners repeat most are Electrical and CRT safety precautions, Use of multimeter, oscilloscope and signal generator, and Rectifier and filter circuit in TV power supply. The syllabus runs to 12 chapters. Below you'll find the full topic-frequency ranking, the exam paper pattern, every chapter, a step-by-step study plan, and the official downloads — everything in one place.

Everything here is free. We're an independent student resource, not the official NIOS body, so always confirm the current syllabus and exam dates on the official NIOS website before you rely on them.

Key information

Subject code: 604
Level: Class 12
Programme: CL12
Exam: On-Demand Examination System
Conducted by: National Institute of Open Schooling (NIOS)

Most frequently examined topics

#	Topic	Times asked
1	Electrical and CRT safety precautions	2
2	Use of multimeter, oscilloscope and signal generator	2
3	Rectifier and filter circuit in TV power supply	2
4	Scanning, raster, field and frame	2
5	Block diagram of TV receiver	2
6	Tuner: RF amplifier, mixer and local oscillator	2
7	Antenna and tuner fault symptoms	2
8	Superheterodyne principle	2
9	Automatic gain control	2
10	CRT construction and working	2
11	Brightness, contrast, focus and screen controls	2
12	Intercarrier sound system	2

Counted across the official previous-year question papers we have analysed for this subject. It shows what has been asked before — it does not predict what will appear in your exam. Always confirm the current syllabus on the official portal.

What you will study (chapters)

Chapter 1: Safety, Tools and Test Instruments
Chapter 2: Basic Electricity and Electronics for TV Repairing
Chapter 3: Television Transmission and Reception Principles
Chapter 4: Antenna, Feeder and Tuner Circuits
Chapter 5: RF and IF Sections of a TV Receiver
Chapter 6: Video Detector, Video Amplifier and Picture Tube
Chapter 7: Sound Section in a TV Receiver
Chapter 8: Sync Separation and Deflection Circuits
Chapter 9: EHT, Power Supply and Protection Circuits
Chapter 10: Colour Television Principles and Circuits
Chapter 11: Fault Diagnosis and Troubleshooting Methods
Chapter 12: Practical Servicing, Alignment and Maintenance

Official textbook

NIOS 604 — TV Repairing — official textbook / study material — Free download from the official source.

How to study NIOS 604 — TV Repairing and score well

Start with the highest-frequency topics — In NIOS 604 — TV Repairing, Electrical and CRT safety precautions, Use of multimeter, oscilloscope and signal generator, Rectifier and filter circuit in TV power supply, and Scanning, raster, field and frame appear again and again in past papers. Master these first — they return the most marks for the time you put in.
Practise with previous-year papers — Solve the last 5–10 years of NIOS NIOS 604 — TV Repairing papers under timed, exam-like conditions. Past papers show exactly which topics repeat and how questions are worded.
Revise actively, not passively — Write a one-page summary for each of the 12 chapters — key definitions, formulas and the points examiners reward — then re-test yourself instead of re-reading.
Mark your answers with the official scheme — After each practice paper, score yourself against the official marking scheme. It shows how marks are awarded step-by-step, so you learn to present answers the way examiners expect.

Exam tips: how to score higher in NIOS 604 — TV Repairing

Where students lose marks: rushing the high-weightage questions, skipping the steps the marking scheme rewards, and saving easy sections for last. Read the whole paper first, attempt your strongest section early to bank marks, and always show your working.

Manage your time: split your time in proportion to the marks each section carries, keep a few minutes at the end to check, and never leave a question blank — a partial, structured answer still earns partial marks.

Frequently asked questions

What are the most important topics in NIOS 604 — TV Repairing?

Based on past papers, the most frequently asked topics include Electrical and CRT safety precautions, Use of multimeter, oscilloscope and signal generator, Rectifier and filter circuit in TV power supply. The full ranked list with how often each appears is in the "Most important topics" section above.

Where can I download NIOS 604 — TV Repairing previous-year question papers?

Official NIOS previous-year question papers are available on the official NIOS website. Open the Question Papers section for the direct link, plus the exam pattern and the topics that repeat most.

How can I prepare for NIOS 604 — TV Repairing faster?

Start with the highest-frequency topics, learn the exam pattern so you know how each section is marked, and practise with past papers. A subject-aware study tutor can quiz you on exactly these topics.

A Gyani AI tutor trained on the NIOS 604 — TV Repairing syllabus and past papers can quiz you on the most-asked topics and show you exactly what to revise.