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故障现象 一台夏警VC—A5080T录像机,接通电源VTR开关能进行加载,多功能显示屏工作状态显示也正常,按重放或录像健时加载导柱、副加载臂、压带轮均能到位,磁鼓电机转动,但主导轴伺服电机不转动。数秒钟后,VTR电源指示熄灭,录像机进入自保护,再按VTR开关,指示灯虽亮,但操作各功能键均不起作用。 分析与检修 主导轴伺服电机是决定磁带运行速度的主要部件,主导轴紧贴压带轮,收带盘和供带盘的转动都是靠主导轴伺服电机直接驱动。如果主导轴电机不转,传感器无信号输出,在这种情况下,录像机就不能进入工作状态。
Fault phenomenon A summer police VC-A5080T VTR, power VTR switch can be loaded, multi-function display working status is also normal, press the playback or video health load guide column, the sub-arm, the pressure wheel can In place, the drum motor rotates, but the capstan servo motor does not rotate. After a few seconds, the VTR power indicator goes out, the recorder goes into self-protection, and then press the VTR switch, the indicator light is on, but the operation of each function key does not work. Analysis and maintenance of the main shaft servo motor is to determine the speed of the main components of the tape, the main shaft close to the press wheel, take-up reel and the supply reel are driven by the main shaft servo motor direct drive. If the main shaft motor does not turn, the sensor no signal output, in this case, the recorder can not enter the working state.