现象:打电话时听不清对方的讲话,感觉非常遥远,听起来相当吃力。分析:若拨号和发话都很正常,表明故障出在受话支路上,可能是消侧音线圈似断非断、变比效率低、耳机效率低或其间的连线松动、氧化接触电 Phenomenon: I can not hear each other’s speech when I’m on the phone, it feels very far away, and it sounds pretty strenuous. Analysis: If the dial-up and speech are normal, indicating that the fault is in the receiving branch, the cancellation of side-tone voice coil may be off, variable efficiency inefficient, low efficiency headphones or the connection between the loose, oxidative contact power