The method of identifying color TV sets in the home appliance industry of the blister machine

Turn the chroma knob to the minimum, adjust the brightness and contrast, the image is clear and soft, with clear layers.

When the chroma knob is turned large, there should be no chaotic flow of colors during the transition from black and white to color images. After calling out the clearest image, continue to turn the frequency fine-tuning button, the image will become rough and distorted, close the frequency self-tuning switch, the image should be restored immediately. Observe whether the colors harmonize naturally. In addition to environmental interference, the appearance of wavy, reticulated and striped images on the screen is abnormal. The volume is appropriately turned up, and the sound is pleasant and not distorted. To adjust the measurement, the contrast knob should have an obvious effect. Tilt the preselectors one by one, and the screen flickers only slightly. Turn off the power switch, the screen does not leave light strips or light spots.