| 故障表现为：图象雪花大 检修及分析：通电试机图象雪花大，AV图象正常，检测高频头 VCC、总线电压均正常，怀疑高频头问题，更换后故障依旧。由此中频电路发现R204电阻开路，更换R204 27欧电阻后故障机修到这里，终于修好值得探讨。。 |
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