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一台步步高BK—784复读机,电机不转动。经检查确认是电机稳速块2606AD损坏,经多方努力均无法买到,正当笔者发愁时发现”手头上有几块LM317,它是一款性能优良的稳压集成电路,外围元件少,输出电压连续可调范围为1.25～32V,且它的输出电流达1.5A。正好在电机的工作范围之内,代换电路见图1所示。具体代换方法:先将电机稳速电路上的元件全部拆除,再把LM317及外围元件安装在原来印刷线路板
A backgammon BK-784 video machine, the motor does not rotate. The inspection confirmed that the motor speed block 2606AD damage, after many efforts are unable to buy, just when I worry about that "a few blocks on hand LM317, it is a good performance of integrated circuits, less peripheral components, the output voltage Continuously adjustable range of 1.25 ~ 32V, and its output current of 1.5A. Just within the working range of the motor, the substitution circuit shown in Figure 1. Specific substitution method: the first motor speed circuit components All demolition, then the LM317 and peripheral components installed in the original printed circuit board