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故障现象:使用外接电源时,电源指示灯亮,机心运转正常,录、放音无声。收音及存储电台正常。用电池工作时,一切正常,但使用一周后(电池电源)也出现上述现象。分析:开机后电源指示灯亮,机心也转动正常,说明电机伺服基本工作正常。此机的收音信号通过杜比解码块 IC102(BA1102FS)的②、(24)脚输入,经⑥脚和(20)脚输出到录放块 IC101及均衡电路,然后到功放 IC103
Symptom: When using an external power supply, the power indicator light, movement of normal operation, recording, playback silent. Radio and storage radio normal. When working with the battery, everything is normal, but after a week of use (battery power) this is also the case. Analysis: After power on the power indicator light, movement is also normal, indicating that the basic work of motor servo is normal. This machine’s radio signal through the Dolby decoding block IC102 (BA1102FS) ②, (24) feet input, the foot and (20) feet through the output to the recording block IC101 and equalization circuit, and then to the amplifier IC103