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下面还以康艺8080—2S型收录机为例,介绍一下电源电路的常见故障及检修方法。 3.交流供电整机不工作用干电池供电时,整机工作正常,改用交流供电时整机所有功能均不工作。分析与检修:(电源原理图详见上一讲图2),直流供电与交流供电的切换点是关CZ_2。既然直流供电整机工作正常,说明开关CZ_2之后的电路是正常的,因此故障在开关CZ_2之前的整流滤波电路中。在整流滤波电路中,最易出现故障的有这几个地方:
The following is also to Kang Yi 8080-2S-type recorders, for example, introduce common faults and power circuit repair methods. 3. AC power supply machine does not work With the battery power supply, the whole machine is working properly, switch to AC power supply when the machine does not work all the features. Analysis and Overhaul: (power schematic shown in Figure 2 above), DC power supply and AC power switching point is off CZ_2. Since the DC power supply is working properly, it indicates that the circuit after the switch CZ_2 is normal, so the fault is in the rectifying and filtering circuit before the switch CZ_2. In the rectifier filter circuit, the most prone to failure in these places: