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实例4 机型:长虹 C2170(TA 机心)型机故障现象:接通电源,机内发出“呜、呜……”的啸叫声,屏幕无光栅。分析与维修:打开后罩,接通电源,迅速测试主电源电压为70V。断开行输出管 c 极,再次测试主电源
Example 4 Model: Changhong C2170 (TA machine) -type machine Fault phenomenon: connected to the power, the machine issued “woo, Woo ... ” howling, the screen without grating. Analysis and Maintenance: Open the back cover, turn on the power, quickly test the main power supply voltage of 70V. Disconnect the output tube c pole and test the main power again