康佳T2910A型彩电接收电视信号时,图像向上不断滚动
测TA8659AN 33脚(复合同步信号)的直流电位偏低,正常应为6.2V,检查相关外围元件R343、C315、R337、C314,发现R337变值。更换R337后,故障排除。
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