故障现象:一台三洋牌GP59058P型20吋彩电,出现三基色完全反相,而且故障现象稳定不变。将色度钮调到最小位置,使彩色处于关闭状态,黑白图像正常,不带任何彩色,说明白平衡正常。检修方法:从故障现象来看,可排除显像管电路与视放电路故障。由于无示波器与彩色信号发生器,用万用表检查色解码电路。检查μPC1423集成块各脚在路 Symptoms: A Sanyo GP59058P 20-inch color TV, the three primary colors appear completely inverted, and the failure of the phenomenon of stable. Turn the chroma button to the minimum position, turn the color off, and the black and white image is normal without any color, indicating that the white balance is normal. Maintenance methods: From the point of view of failure, CRT circuit can be excluded and the visual circuit fault. Because no oscilloscope and color signal generator, check the color decoder circuit with a multimeter. Check the μPC1423 manifold for each leg on the road