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故障现象:一台TOPCON单色显示器在联机时加电,工作指示灯亮,有高压启动的声音,开机数秒钟后,机内出现“吱吱”声,且显示器没有光栅(该类机在正常情况下联机才有光栅).故障分析:根据机内发出的“吱吱”叫声和工作指示灯亮这一现象,可以说明稳压电路基本正常,故障可能是行输出电路及行输出负载电路存在短路现象,从而引起电源负载过重而发出不正常的叫声.
Symptom: A TOPCON monochrome monitor is powered on when it is on-line. The working indicator light is on and there is a high-voltage start-up sound. After a few seconds of power-on, a “creak” sound appears inside the monitor and the monitor has no raster Under the grating on the line.) Failure Analysis: According to the machine issued a “creak” sound and the work light is on, this shows that the regulator circuit is normal, the fault may be the line output circuit and line output load circuit short circuit Phenomenon, thus causing the power load is too heavy and made abnormal calls.