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一台长城14英寸数控彩色显示器,故障现象为:屏幕上方约5cm宽的部分突然出现不均匀的扫描线,图像上部稍被压缩,其它部分显示正常,基本不影响使用。顺着场偏转线圈向回查,发现电阻R731和二极管D601已被烧焦,型号规格无法辨认。测得电阻约为1kΩ,二极管已被击穿。更换一只1kΩ、1/8W电阻和一只
A Great Wall 14-inch CNC color display, the fault phenomenon: the top of the screen about 5cm wide part of the sudden emergence of uneven scanning lines, the upper part of the image is slightly compressed, the other part of the display normal, the basic does not affect the use. Follow the field deflection coil back to check and found that the resistor R731 and diode D601 have been burned, model specifications can not be identified. Measured resistance of about 1kΩ, the diode has been breakdown. Replace a 1kΩ, 1 / 8W resistor and one