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aft xin hao yi chang de pan duan he diao zheng
Author(s): 
Pages: 28
Year: Issue:  3
Journal: Family Electronics

Keyword:  接收频率彩色电视机电路失效电视信号万用表通道图像检波信号异常鉴频曲线高频头;
Abstract: <正> 为保证彩色电视机接收频率的稳定性,在中放(通道)IC中都设有AFT电路。如果中放AFT电路失效,电视机会出现收台后不能锁台等故障。通过观察AFT的鉴频曲线,可判断AFT电路的正常与否。
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