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高士达KR—39、KR—99一类视频录像机,采用相同的开关电源。整个开关电源部分安装在一个金属盒内,与主电路插接。开关电源主要由脉冲调宽集成块FA5311和场效应管K903及外围元件组成。此开关电源由于市电电压升高及负载加重(例如卡带)等原因,较易损坏。损坏时,表现为K903击穿,FA5311多数也同时损坏,有的甚至炸裂。K903尚可用同类的K1611和K1198代换,但FA5311市场却无货供应,尚未找到
Goldstar KR-39, KR-99 a video recorder, using the same switching power supply. The entire part of the switching power supply installed in a metal box, and the main circuit plug. Switching power supply mainly by the pulse width modulation integrated block FA5311 and FET K903 and external components. This switching power supply is more susceptible to damage due to higher mains voltage and heavier loads (such as cassettes). Damage, the performance of K903 breakdown, FA5311 most also damaged, and some even burst. K903 is still available with similar K1611 and K1198 substitution, but the FA5311 market is not available, have not yet found