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彩色电视机的电路结构是比较复杂的,特别是目前出的大屏幕彩电,增加了许多新的功能。因此,更加难以区分引起故障的原因,加大了维修的难度。但是,有些常见故障则可以一锤定音,直接找出故障的部位或故障元件,而且准确度很高。下面我举数例加以说明,供电子专业的学生及家电维修爱好者参考。例1 故障现象:开机时图像模糊,声音正常,只能看到一些彩色影像,随后图像逐渐清楚,轻则几分钟恢复正常,重则要几十分钟才能恢复。排除方法:更换显像管驱动板上的显像管管脚插
Color TV circuit structure is more complicated, especially the current large-screen color TV, adding many new features. Therefore, it is more difficult to distinguish the cause of the malfunction and increase the difficulty of the maintenance. However, there are some common faults that you can hammer out and find the faulty parts or faulty components directly, with high accuracy. Here I give a few examples to illustrate, for electronic professional students and appliance repair enthusiasts reference. Example 1 Symptom: When you turn on the camera, the image is fuzzy and the sound is normal. You can only see some color images. Then the image gradually becomes clear, ranging from a few minutes to normal, and then it takes tens of minutes to recover. Remedy: Replace the CRT driver board on the CRT pin