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本文将美多牌CT6620型收录机的各种常见故障和检修方法扼要叙述如下.该机的电路图见本刊1982年第11期.在检修该机时,只需卸去机箱下四只螺钉,整个机芯即可从机壳前面拉出,十分方便.低放和功放公用通道该机的低放和功放是收、录、放公用的,其常见故障是无声、严重失真和有噪声等.一、无声或音轻1.取出机芯后,首先开机检查220伏电源是否输入,扬声器右下角的电源指示灯(14伏)与收音刻度板上三只照明灯(6.3伏)是否发光,如都不亮,应检查220伏保险丝(0.2安)是否熔断.
In this paper, the United States and more brand CT6620-type recorders a variety of common faults and maintenance methods briefly described in the circuit diagram of the machine see article No. 1982. In the maintenance of the aircraft, just unload the chassis under the four screws, the whole The movement can be pulled out from the front of the case, is very convenient. Low-amp and amplifier common channel Low-power amp and amplifier is received, recorded, put public, its common fault is silent, serious distortion and noise. , Silent or light 1. Remove the movement, the first boot 220V power supply is to check whether the power indicator light (14V) in the lower right corner of the speaker and the three lights (6.3V) on the radio calibration board emit light, Not bright, should check the 220-volt fuse (0.2 A) is blown.