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接通市电后,操作任何功能健都无声。经检查是电源变压器烧坏。看随机图纸的标称值,次级输出18V,用一只18V黑白电视机用的变压器换上。再接通电源,也无论任何状态工作,喇叭上只有“卟卟”的声音,几秒钟后一点声音也没有了,但是电平指示有节奏地在闪动。根据以上故障分析,认为故障出在遥控音量控制或功放部分。用万用表直流档检查,功放TDA2003,发
Connected to the electricity, the operation of any health function is silent. After the inspection is the power transformer burnout. Look at the nominal value of random drawings, the secondary output 18V, with a 18V black and white TV with the transformer replaced. Then turn on the power, no matter what the state of work, the speaker only “porphyrin” sound, a few seconds later the sound is gone, but the level indicator rhythmically flashing. According to the above fault analysis, that the fault is remote control volume control or amplifier section. DC file with a multimeter check, amplifier TDA2003, hair