论文部分内容阅读
录音机在使用过程中,经常会出现放音变调的现象,表现为带速不稳、声音变是低沉或尖细。遇到此类故障时,可以从以下几个方面进行检查、处理。一、电源电压异常。电源电压异常情况有两种。1.市电电压过高或过低。我校以前长期处于欠压状态,配置的录音机普遍出现放音变调的情况,当市电正常时,“故障”自动消失。2.录音机的电源电路部分有故障。主要是整流二极管开路、滤波电容失效等造成整机供电不足。可对这些元件进行逐个检查,遇有上述问题及时更换。二、传动机构工作不良。 1.飞轮稳速部分对整机传动机构起着平衡恒速的重要作用。当其中的传动皮带老化变长或各
Tape recorders in the course of the use, often changing tone playback phenomenon, manifested as instability with the belt, the sound becomes low or tapering. In the event of such failure, you can check from the following aspects, processing. First, the power supply voltage anomalies. There are two types of power supply voltage abnormalities. 1. Mains voltage is too high or too low. I used to be in a state of under-voltage for a long time, and the configuration of the tape recorders generally changed the tone. When the mains is normal, the “fault” disappears automatically. 2. Recorder power circuit part of the fault. Mainly rectifier diode open, filter capacitor failure caused by insufficient power supply. These components can be checked one by one, in case of the above problems promptly replaced. Second, the transmission is not working well. 1. Flywheel steady part of the whole transmission mechanism plays an important role in the balance of constant speed. When one of the drive belt longer or longer aging