论文部分内容阅读
故障现象:一台康佳彩霸T2977X型74cm(29英寸)直角平面彩电,在正常收看中偶尔“自动停机”。但红灯亮,停机后用遥控器或主机电源开关强行开机能正常工作。分析与维修:该机是康佳集团销售量最大的机型,但是“自动停机”是该类型机的通病。其检修过程如下:开机测主开关电源输出电压为+140V稳定不变,但自动停机后+140V电压立刻降为0V,开关管V401
Symptom: a Konka Cho tyrants T2977X 74cm (29 inches) rectangular flat color TV, in normal viewing occasional “automatic shutdown.” But the red light, stop using the remote control or the host power switch to force the boot to work properly. Analysis and Maintenance: This machine is the largest sales of Konka Group models, but “automatic shutdown” is the common problem of this type of machine. The overhaul process is as follows: turn on the test main switch power supply output voltage of + 140V stable, but automatically shut down after + 140V voltage is immediately reduced to 0V, switch V401