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1.“X射线”过高保护“X射线”过高保护由稳压二极管D431和电阻R432组成,对行输出变压器T402的④~⑦绕组感应电压,经D408整流、E416滤波后的电压进行检测。行输出电路正常时,C416两端的电压低于D431的稳压值15 V;当因开关电源输出的VCC+115 V电压过高、行逆程电容器开路等原因,会使行逆程时间变短,行输出变压器T402各绕组感应电压升高,使T402的⑦脚电压升高,经D406整流、C416滤波后的14 V电压上升,使稳压二极管D431击穿,将高电平通过XE02A/B
1 “X-ray” high protection “X-ray” high protection by the voltage regulator diode D431 and resistor R432 composition of the output transformer T402 ④ ~ ⑦ winding induced voltage, rectified by D408, E416 filtered The voltage is detected. When the output circuit is normal, the voltage across C416 is lower than the regulated value of D431 by 15 V. When the voltage of VCC + 115 V output by the switching power supply is too high, the open-circuit capacitor is open, the reverse run time will be shortened , Line output transformer T402 each winding induction voltage increases, so that T402 ⑦ pin voltage increases, rectified by D406, C416 filtered 14 V voltage rise, the Zener diode D431 breakdown, the high through the XE02A / B