论文部分内容阅读
近两年来,牡丹54C3A彩电出现随意关机的故障率较高,主要表现在等待电源指示灯亮,不能开机,且伴有较小的“噗噗”声;或能开机,但数分钟后又自动关机,这种故障出现后,有的彩电能自动开机且反复发作,有的须人为关机后再开机。不管故障现象表现如何,但可以肯定,90％以上是遥控板上的电源控制三极管V959性能变劣所致。V959原电路设计采用日本三
In the past two years, Peony 54C3A color TV appeared a higher failure rate of random shutdown, mainly in the waiting for the power indicator light, can not boot, and accompanied by smaller “pop puff” sound; or can boot, but then automatically shut down after a few minutes , After this kind of breakdown arises, some color televisions can be switched on automatically and recurrently, some people must turn off the power and then boot. Regardless of the performance of the fault phenomenon, but it is certain that more than 90% of the remote control board is the power control transistor V959 performance deterioration. V959 original circuit design using Japan III