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一、创维STR—S6709组成的开关电源中,Q601(D1640)代用管的选用在创维大多数机芯中采用STR—S6709组成的并联型开关稳压电源,该电源性能好,底板不带电,稳压范围宽,一般市电在80～260V之间变化时,主电源+B输出电压相当稳定。在维修中发现给STR—S6709⑨脚供电的晶体管Q601是易损元件,常使彩电出现不能开机的故障现象。该管原装型号在市场上难以买到,故我用调压器,通过对一台29NL/5T20创维彩电的实测来确定其代用管参数。
First, Skyworth STR-S6709 switching power supply, Q601 (D1640) Selection of alternative tubes in most of the movement in Skyworth STR-S6709 composed of parallel switching power supply, the power performance, the floor is not charged, stable A wide range of pressure, the general mains changes between 80 ~ 260V, the main power supply + B output voltage is quite stable. Found in the maintenance of STR-S6709 ⑨ feet of the transistor Q601 power supply is a fragile component, often do not turn on the color TV failure phenomenon. The tube original model is difficult to buy in the market, so I use a voltage regulator, through a 29NL / 5T20 Skyworth TV measured to determine the parameters of its substitute tube.