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金星C—6438型彩电遭雷击后损坏。检修此机有两条路径:一是电源电路;二是信号输入电路。因此首先检查电源电路及高频头电路,发现电源电路中部分铜箔已掀起,于是接好断路的铜箔,检测负载无短路,开机检查,电源指示灯不亮。测C_(807)有300V电压。接上假负载,各路电压均无输出,此电路采用N801(TEA2261)作为电源振荡和反馈控制电路,而N802(TEA5120)作为采样稳压控制电路。测N801第(16)脚无12V电压
Venus C-6438 TV was damaged after lightning. Overhaul this machine has two paths: First, the power circuit; the second is the signal input circuit. Therefore, first check the power circuit and the high-frequency circuit and found that part of the power supply circuit has been set off the copper foil, then cut off the copper foil, the test load without short circuit, power check, the power light does not shine. Test C_ (807) has 300V voltage. Connect the false load, no output voltage of each circuit, this circuit uses N801 (TEA2261) as the power supply oscillation and feedback control circuit, and N802 (TEA5120) as a sampling regulator control circuit. Measured N801 (16) feet without 12V voltage