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故障现象:重放时,屏幕上有严重的杂波,记录后重放,无图像、无声音,摄像,监视均正常。检修过程:根据进带、出带、重放加载、走带等动作均正常的情况,分析该故障与视频磁头或机械走带路径有关。打开外壳,首先擦试磁头鼓,结果开机后重放故障依旧。尔后仔细观察机械部分,发现磁带加载到位后,磁带包绕在磁鼓上运行时,在入导柱一侧磁带脱离运行轨迹,向上方位移了3～4mm。导致视频磁头不能
Symptoms: playback, the screen has a serious clutter, record playback, no images, no sound, camera, monitoring are normal. Maintenance process: According to into the belt, a belt, replay load, take the belt and other movements are normal situation, analysis of the failure and video heads or mechanical transport path. Open the shell, the first rub test head drum, the results after the boot playback failure still. After careful observation of the mechanical part, it was found that when the tape was loaded in place and the tape was wrapped around the drum, the tape deviated from the running track on the side of the guide post and moved upward by 3 to 4 mm. Cause the video head can not