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1.电源电路无电压输出开机前,应确认器件没有掉件及连焊。如开机异常,按如下顺序查找。(1)测量电源板输出5 V电压开机测量输出端XP802的⑩、脚(5 V—S端)是否有5 V电压输出,若有5 V电压输出,则检测待机控制电路电压;若没有5 V电压输出,则进行下一步,测量主电源电压。(2)测量主电源电压测量C810(450 V大电解电容)两端电压是否在300 V左右(交流220 V输入),若没有300 V电压,测量前面是否有交流输入或熔丝是否损坏;若有300 V电
1. Power supply circuit voltage output before boot, you should confirm that the device has no pieces and even welding. Such as boot abnormal, according to the following order to find. (1) Measure the power supply board output voltage of 5 V. Measure whether there is a 5 V voltage output on the ⑩ of the XP802 at the power-on measurement terminal (5 V-S terminal). If there is a 5 V voltage output, V voltage output, proceed to the next step and measure the mains voltage. (2) Measure the mains voltage Measure whether the voltage across C810 (450 V electrolytic capacitor) is around 300 V (220 V AC input). If there is no 300 V voltage, measure whether there is AC input or if the fuse is damaged in the front. There is 300 V electricity