658彩票官网

658彩票官网

创维26LED10液晶电视8M81机芯开机有伴音,显示屏一半无光栅

测量5800-D26T00-0980背光灯板背光灯驱动电路1的升压输出端C02两端输出电压正常,但测量背光灯驱动电路2 的输出端C11两端电压仅为16V,判断背光灯驱动电路2未工作。检查U03的⑥脚无激励脉冲输出,测量U03的①脚电压仅为0.9V,低于正常值2.5V,检查①脚外部的电路元件,发现分压电阻R24阻值变大,由正常时的20kΩ增大到100kΩ,更换R24后,故障排除。
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点击次数:  更新时间:2018/3/30  【打印此页】  【关闭

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