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如图所示断开1或2引线,36镇流器输入功率约为20W灯不亮,三极管剧烫,经查DB3不良.测试该DB3转折电压电流同其他没有明显差别.请各位高手分析原因,并提供DB3的全面检测方法和质量较好的厂家.谢谢
