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索尼KV—G25M1彩电属于BG—1S机芯,该机型采用BT—AG401型高频头,其损坏后不易购买且价格昂贵。但通过适当增加一些电路,可用TDQ—3型高频头进行代换。原机高频头与TDQ—3型高频头工作条件有很大差异,如图1所示。其工作电压为9V,U/V、L/H为频段切换电压组合。为了满足TDQ—3型高频
Sony KV-G25M1 color TV belong to the BG-1S movement, the model uses BT-AG401-type tuner, the damage is not easy to buy and expensive. However, by appropriate increase in some of the circuits available TDQ-3 type tuner substitution. The original machine tuner and TDQ-3 type tuner working conditions are very different, as shown in Figure 1. The operating voltage of 9V, U / V, L / H for the band switching voltage combination. In order to meet the TDQ-3 type of high-frequency