有线电视数字机顶盒出现故障后,要根据故障现象,确认故障发生在有线网络还是机顶盒,然后按照先观察后测量,先重点后一般,先主要部件后一般部件“的原则进行检查和维修。例如,当机顶盒出现故障时,我们首先想到的是电源供电部分是否有问题,只有电源供电电路正常,机顶盒其他电路才能正常工作。在检修过程中,有些问题不一定是机顶盒故障,而是其他原因造成的,具体表现和检查方法如下。 Cable TV digital set-top box failure, according to the fault phenomenon, to confirm the failure occurred in the cable network or set-top boxes, and then follow the first observation after the measurement, the first focus after the general, the first major components after the general components ”principle of inspection and repair. , When the set-top box fails, we first think of the power supply is part of the problem, only the power supply circuit is normal, set-top box other circuits to work.In the repair process, some problems are not necessarily set-top box failure, but for other reasons The specific performance and inspection methods are as follows.