海信彩电解码板无图像,满屏消隐线
开机屏幕上有十几条较粗的消隐线,而且扫描不到屏幕两边,无字符。从故障现象判断,可能扫描驱动信号有问题,测量集成电路TDA9332H的+8V供电电压正常,试代换晶振Z301无效,测量#10脚、#11脚总线电压正常,怀疑TDA9332H存在故障,更换后故障排除。
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