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3.待机电路待机控制电路由微处理器QA01的⑦脚、Q830和Z80l内部的Q3、Q4、ZD2、Q2组成。待机控制电路主要控制两种电源改变状态:一是控制主开关电源输出电压,待机电路通过稳压环路的Q883、Q862,对主开关电源的Q80l实施控制,开机时输出额定高电压125V,待机时降到额定值的1/2左右;二是控制行振荡和小信号处理电路的电源,待机电路对行振荡稳压电路Q430和小信号处理稳压电路Q420、Q830进行控制,开机时向行振荡和小信号处理电路提供电源,待机时切
3. Standby circuit Standby control circuit by the microprocessor QA01 feet, Q830 and Z80l internal Q3, Q4, ZD2, Q2 composition. Standby control circuit mainly controls two kinds of power to change the state: First, control the main switch power output voltage, the standby circuit through the regulator circuit Q883, Q862, the main switching power supply Q80l implementation control, boot rated output high voltage 125V, standby Down to about 1/2 of the rated value; the second is to control the oscillation of the line and the small signal processing circuit power supply, the standby circuit to the line oscillation regulator circuit Q430 and small signal processing regulator circuit Q420, Q830 to control the boot line Oscillation and small signal processing circuit to provide power, standby cut