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例1 [现象]不能录象,自动保护关掉电源。 [分析与检查]检查录象带良好。装入摄象机观察,加载正常。按录、放键都自动保护停机,但快进、快退正常。经仔细观察,发现快进或快退时磁鼓不转动,重放或录象时,磁鼓转速逐渐变慢,最后停止,自动保护。取出录象带,用手轻轻转动磁鼓,似有摩擦现象,正常时磁鼓转动灵活,无阻力。判断上、下磁鼓间有异物,使磁鼓转速变慢,引起自动保护。 [措施]拆下上磁鼓后用酒精清洗,清理下磁鼓,待酒精蒸发后,恢复安装,磁鼓转动灵活,试机
Example 1 [phenomenon] can not record, automatic protection turn off the power. [Analysis and Inspection] Check the tapes are good. Into the camera observation, loading normal. Press, put the keys are automatically protected down, but fast forward, rewind back to normal. After careful observation, found that the fast forward or rewind the drum does not rotate, playback or video, the drum speed gradually slow down, the last stop, automatic protection. Remove the video tape, gently rotating the drum, seems to be friction phenomenon, the normal rotation of the drum flexible, non-resistance. Judge the upper and lower drums have foreign objects, the drum speed slowed down, causing automatic protection. [Measures] Remove the drum after cleaning with alcohol, clean the drum, until the alcohol evaporates, restore the installation, the drum rotation flexible, test machine