GX-JD22B Home Appliance Audio and Video Maintenance Training and Assessment Equipment

一、 Product Overview

     The home appliance audio and video maintenance skills training and assessment device is developed in accordance with the "Technical Specification for Home Electronic Product Maintenance Workers, Vocational Skills Training and Appraisal Equipment" issued by the Ministry of Labor and Social Security and the teaching and training requirements of vocational education. It is suitable for vocational colleges and schools to apply electronic technology, electronic appliance application and maintenance, and other professional television principles and maintenance Practical training and teaching of courses on principles and maintenance of household electronic products. It is also suitable for home appliance majors in technical schools, vocational training schools, vocational education centers, and appraisal stations/institutions, as well as audio and video maintenance practical operations for home appliance maintenance workers, as well as skill appraisal and assessment for intermediate and senior workers.

  二、Technical parameters

1) Input power supply: single-phase three wire AC220V ± 10% 50HZ;

2) Working environment: temperature -10 ℃~+40 ℃, relative humidity<85% (25 ℃);

3) Machine capacity: ＜ 300VA;

4) Safety protection: action current ≤ 30mA, action time ≤ 0.1s.

三、Practical training projects

1. Understanding the Internal Structure of LCD TVs

2. Understand the basic structure of each main unit in LCD TV

3. Working principle of LCD TV

4. General principle block diagram of power circuit board

5. EMI filter and rectifier filter circuit

6. Switching transformer

7. PWM controller FAN6755

8. FAN6755 power supply circuit

9. FAN6755 power failure and overvoltage protection circuit

10. FAN6755 Drive Output and Overcurrent Protection Circuit

11. FAN6755 feedback circuit

12. Schematic diagram of high-voltage inverter circuit

13. Controller KA7500C

14. Working Principle of LCD TV Main Circuit Board

15. Working principle of LCD display screen

16. Maintenance ideas for LCD TV power board

17. Maintenance ideas for LCD TV digital motherboard

18. Basic maintenance methods for LCD televisions

19. Maintenance methods for important components

20. Maintenance methods for abnormal power output

21. Maintenance methods for abnormal backlight lights

22. Fault detection with images and no sound

23. Detection process for invalid keying/remote control

24. Normal sound and blue screen detection process

25. Use of intelligent assessment software