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该机子画面正常,主画面缺红色,分析此机电路原理,估计故障部位在主通道的色度解码部分,即IC6001(TA8719AN)。原理图上没有标注该集成块各脚电压值,查有关资料,发现此集成块与TA8659AN可互换。因此,以TA8659AN的电压参数作依据,测量发现TA8719AN(60)脚(R—Y色差信号输入端)电压为11.2V,比正常值5.9V高5.3V,估计故障系此脚电压升
The machine screen is normal, the main picture of the lack of red, the analysis of the circuit principle, the estimated fault location in the main channel of the chroma decoding part, that IC6001 (TA8719AN). Schematic diagram does not mark the voltage value of the foot of the manifold, check the relevant information and found that the manifold and the TA8659AN interchangeable. Therefore, TA8659AN voltage parameters as the basis, the measurement found TA8719AN (60) feet (R-Y color difference signal input) voltage of 11.2V, higher than the normal 5.9V 5.3V, it is estimated that the Department of foot voltage rise