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按下“电源开/关”键,红色待机指示灯瞬间点亮后即熄,无法进入待机状态。正常待机时为红灯,按“待机”键红灯灭、绿灯亮,进入收看状态。开盖检查元件表面无异常。电源及有关保护电路如图1所示。将表笔依次搭在电源次级整流二极管VD713、VD714、VD715负极后,按下“电源开/关”键,瞬间分别显示电压为:12～
Press “power on / off ” button, the red standby indicator lights immediately after extinguished, can not enter the standby mode. Normal standby for the red light, press “standby ” button red light off, the green light, into the watch state. Open the cover to check the surface of the device without exception. Power and related protection circuit shown in Figure 1. The test leads followed by the power secondary rectifier diodes VD713, VD714, VD715 negative, press the “power on / off ” button, instantly showed the voltage is: 12 ~