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故障现象:一台新科W—701A型放音机,按下放音键,耳机内有“卟卟”声,响声过后声音全无,但走带机构运转正常。
Symptoms: A new Branch W-701A playback machine, press the release button, the headset has a “porphyrin porphyrin” sound, no sound after the sound, but the transport mechanism is operating normally.