故障现象:收录机在录放音时,转动和传动部件的机械噪声大。故障分析:产生机械噪声的原因大体有两个:一是传动、转动部件因使用时间长久,磨损严重,变形厉害造成的:二是因缺油或脏污、有异物阻塞引起的。检修方法:针对不同的噪声其检修方法不同。1.在放音状态下伴有周期性的“吱吱”声。这种响声可能是由于磁带质量低劣、工艺 Symptom: Tape recorders in the recording and playback, rotating and transmission parts of the mechanical noise. Failure Analysis: Generating mechanical noise in general there are two: First, transmission, rotating parts due to the use of a long time, severe wear and tear, caused by devastating: Second, due to lack of oil or dirt, foreign body obstruction caused. Maintenance methods: for different noise its maintenance methods are different. 1. In the playback state accompanied by a periodic “creak” sound. This noise may be due to poor quality tape, process