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长虹牌Ｃ２５８９Ｐ型彩电故障检修１０例李炳娟［例１］故障现象有图像有伴音，但图像上部出现数条回扫线。分析检修因回扫线没有布满整个屏幕，说明场消隐脉冲已加到视放电路，故障是因场输出级工作不良或供电不足，使场逆程时间延长，不能消除电子束的轨迹所致。本机场...
Changhong card C2589P color TV troubleshooting 10 cases Li Bingjuan [Example 1] Symptoms of the phenomenon of the image sound, but the image appears several flyback lines. Analysis and repair because the flyback line is not covered the entire screen, indicating that the field pedestal pulse has been added to the video circuit, the fault is due to field output stage poor or insufficient power supply, the field inverse time, can not eliminate the trajectory of the electron beam To This airport ...