What are the main parts of a black-and-white television receiver? What is the function of each part?
Four 、 switch power supply part: provide the necessary DC power for the whole machine
Three, sound processing part: mainly including second sound in, sound frequency discriminator, low-frequency amplifier circuit, etc.;
Two, grating forming part mainly includes synchronous separation circuit, line scanning circuit, field scanning circuit, high voltage circuit, etc.;
First, the image processing section: mainly including high frequency tuner, middle discharge and visual reset;
