机型:环宇33cm(17英寸)黑白电视机故障现象:满屏回扫线。诊断过程:某日上午,接到一位同行电话,想叫我去他那帮一下忙,处理一下他认为很棘手的软故障。他告诉我,一台环宇43cm(17英寸)黑白电视机,出现了回扫线,有图像。他查遍了有关场消隐信号的所有电路,甚至代换了视放级所有的元件,故障依旧。我知道这位同行,虽不是老手,倒也有两下子,尤其是心细、 Model: Universal 33cm (17 inches) black and white TV Symptom: Full screen flyback line. Diagnostic process: One morning, I received a colleague’s phone call and wanted me to go to his favor for a moment and deal with soft faults that he considered very troublesome. He told me that there was an image of a looping 43cm (17-inch) black-and-white television with a retrace line. He searched all the circuits for field blanking signals, and even replaced all the elements of the playback stage, the fault still. I know this colleague, although not a veteran, there are two things, especially the heart,