该语言复读机上市早,社会拥有量大,随着时间的推移,故障机器也就相对较多。为方便检修,笔者根据实物绘制了电路如图1所示。表1～表4是正常工作时的实测数据。下面根据电路图对工作原理给予简要分析。该机音频前置放大电路没有采用市场较为流行的录放集成块 TA7738,而采用分立元件;功放电路 IC 采用 TDA2822M;电机稳速 IC 采用 D6650;系统控制 CPU为黑石膏封装的贴片元件,上面没有标记型号;DSP 及 The language repeater machine market early, the community has a large amount, over time, the fault machine is relatively large. For the convenience of maintenance, I draw the circuit according to the kind shown in Figure 1. Table 1 ~ Table 4 is the normal working hours of the measured data. The following based on the circuit schematic to give a brief analysis of the working principle. The aircraft audio preamplifier circuit is not used in the market more popular recording and storage block TA7738, and the use of discrete components; amplifier circuit IC using TDA2822M; motor speed IC using D6650; system control CPU for the black gypsum packaging chip components, above no Mark model; DSP and