一台长虹LED 32B3060开机指示灯不亮,电源板号HSS30D-1MF 184,查电源12V在1.5-4.8V之间跳动,拔掉到主板的电源排线,12V慢慢上升到12.22V,一 带负载立马降为零V左右,该机电源芯片采用NCP1251六脚贴片,由于没有电路图,就顺着电路跑,最后查出是二极管D202短路,换之12V及25V电压正常,修复后把原机数据做了个备份,与大家共同分享.
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