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开关电源是数字高清彩电中故障率最高的电路,开关电源出现故障后,会导致各种其他故障,最常见的现象就是不开机,整机无反应,电源指示灯不亮。除此之外,还会引起行幅不正常、开机后,关机保护等现象。下面详细介绍开关电源常用的维修方法、常见故障的维修和开关电源模块级代换技法。1.开关电源的维修方法(1)假负载法开关电源在负载短路时输出电压会降低,同理,在
Switching power supply is the highest failure rate of digital high-definition color TV circuit, switch power failure, will lead to a variety of other failures, the most common phenomenon is not boot, the machine no response, the power light does not shine. In addition, will also cause the line is not normal, boot, shutdown protection and so on. The following details of the commonly used switching power supply maintenance methods, maintenance of common failures and switching power supply module level substitution techniques. 1. Switching power supply repair methods (1) fake load switching power supply output voltage will be reduced in the load short-circuit, the same token, in the