一台松下L15录像机,电源部分开关电源膜块STRD1816及稳压膜块STK5392损坏。据用户反映该机曾送过几个地方维修,均未修好,换上好的膜块开机即烧坏。由此判断电源部分还有隐患,估计为某个元件在高电压下有软击穿现象,但这种损坏一时很难判断。而且线路板也因原先的维修人员将许多元件焊上焊下,许多铜皮已浮起,若处理得不好,以后还会出现接 A Panasonic L15 VCR, the power part of the switching power supply film block STRD1816 and regulator block STK5392 damage. According to the user to reflect the aircraft had sent several places to repair, were not repaired, put a good piece of film that is burned boot. Judging from the power part there are hidden dangers, it is estimated as a component under high voltage soft breakdown phenomenon, but this damage is difficult to judge at a time. And the circuit board due to the original maintenance staff will be welded on many components, many copper skin has floated, if not handled well, there will be after the connection