一台创维skyworth 8000T-2922型彩电,故障现象三无,开盖检查,电源指示不亮,测主电源电压只有20V,当断开控制管Q603的基极时,主电压及其它的几组电压也都恢复正常,经查是Q602的集电极电阻R622由原来的12欧变成了无穷大,更换后故障排除. |
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