例1 故障现象:与电视机配接时,图像出现行不同步的斜影条,但电视机接收电视信号又正常。分析检修:根据故障现象判断、问题可能出在录像机伺服系统中。因为磁鼓转速、主导轴转速过快造成速度成倍增加时,就会引起此类故障。但是此机伴音正常,说明主导轴转速正常(因为主导轴转速不正常时, Example 1 Symptom: When connected with a TV set, the picture shows an oblique bar that is out of sync, but the television receives the TV signal again. Analysis and maintenance: According to the phenomenon of failure to judge, the problem may be in the video recorder servo system. Because the drum speed, the main shaft speed is too fast resulting in double the speed, it will cause such failures. However, this machine sound normal, indicating the normal speed of the main shaft (because the main shaft speed is not normal,