How to repair an old television set

The repair of the old TV set needs to understand its basic structure and working principle. Television sets mainly include picture tubes, image processing circuits, etc. If you encounter a malfunction, you can repair it according to the following steps:

1. Check whether the power cord is plugged in tightly and whether the power supply is normal. Check whether the TV switch is damaged, disassemble the TV to check whether the power board is obviously burned out.

2. Check for loose parts connecting cables. Input signal cables, tuners and various other wiring can be disassembled to check for failed parts.

3. Check for obvious part of the problem, for example, if the TV set has a distorted picture or black and white problems, it may be a problem with the image processing circuit. Check for good connections between circuits and blocked channels.

4. Check the status of the TV's desensitized tuner and FM tuner. The tuner is one of the main input circuits of the TV set, but it is prone to problems, such as tuning out small signals, false tuning, etc. to check and debug the fine settings.

5. Check the picture tube. The picture tube is the most critical part of the TV set, it needs to be driven by high voltage to work properly. If there is a problem, the internal circuitry of the tube may be damaged. Try removing the tube and checking for damage or flaking coatings.

Repairing an old TV requires more specialized knowledge of electronics. If you can't fix it yourself you can hand it over to a professional repair organization. (301 words)