彩色电视机在发生大故障前往往有先兆,用户如果细心观察,及时修理,就可以避免大故障,减少损失。 开机后,整个图像画面逐渐缩小变暗。说明输出部分或稳压电源有故障,继续使用可能损坏行输出管或电源调压管,造成荧光屏无光。 Color TV in the event of a major fault often have a warning, the user if careful observation, timely repair, you can avoid major problems and reduce losses. After power on, the entire image is gradually dimmed. Description of the output section or the power supply is faulty, continue to use may damage the line output tube or power regulator, causing the screen no light.