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在检修电视机的过程中,遇到行管损坏,又一时买不到原型号或参数(这些参数主要指Vcbo、Icm、Pcm)相一致的代换管时,用参数相近的管子进行代换是常用的处理方法。在代换原则上,代换管的参数应与原管一致或稍大一些。在实际工作中,当代换管的几项参数无法全部满足代换原则时,鉴于原管参数在设计电路时都留有一定的余量,因此,在反向击穿电压Vcbo满足要求的前提下,Icm、Pcm略低于原管的管子进行代
In the process of overhauling the TV, encountered pipe damage, but also can not buy a prototype or parameters (these parameters mainly refers to Vcbo, Icm, Pcm) consistent replacement pipe, the pipe with similar parameters substitution Is commonly used approach. Substitution principle, the replacement pipe parameters should be consistent with the original tube or slightly larger. In practical work, when several parameters of the current pipe change can not all satisfy the principle of substitution, given that the original pipe parameters have a certain margin when designing the circuit, under the premise of the reverse breakdown voltage Vcbo meeting the requirements, Icm, Pcm slightly lower than the tube of the original tube on behalf of