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故障现象:接通电源后,VRT 指示灯瞬间闪亮一下即灭,按面板上各功能键均无效,显示屏上仅有“0:00”在闪跳。分析与检修:因故障发生后录像带留在机内,无法用出盒键取出,故先断电卸下后盖极,用“手工操作法”取出机内录像带。在磁带出盒过程中,仔细观察机内传动机构的动作未见异常。根据现象分析,该故障不是出在系统控制电路,就是出在电源电路。先检查电源电路,测电源输出接插件 P1001各脚对地电阻未见异常,通电测量该接插件各脚电压均正常,说明电源电
Symptom: After the power is turned on, the VRT indicator blinks momentarily and extinguishes. Pressing all the function keys on the panel is invalid. Only “0:00” is blinking on the display. Analysis and Maintenance: After the incident occurred in the video cassette left in the machine, can not be removed with the box key, so the first off after removing the lid, with “manual method” to remove the machine video. In the tape out of the box, carefully observe the movement of the machine without exception. According to the phenomenon analysis, the fault is not in the system control circuit, is out of the power circuit. First check the power circuit, measuring the power output connector P1001 pin resistance to the ground no exception, power measurement of the connector pin voltage are normal, indicating the power supply