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家电检修技术2006年第12期2.高压电源失压检测电路高压电源失压检测电路如图8(b)所示。该电路为单路电压欠压、失压检测电路,大多用到电压较高的被检测电路中,被检测电压通过R5、R6分压电阻,接到PNP检测管V1的基极。被检测电压正常时,R6上端电压高于检测管的发射极电压,通过R2?
Appliance repair technology in 2006 No. 12 2. High-voltage power loss detection circuit High-voltage power supply voltage loss detection circuit shown in Figure 8 (b) below. The circuit is a single voltage undervoltage, loss of voltage detection circuit, most of the voltage used to be detected circuit, the detected voltage through the R5, R6 divider resistance, PNP detection tube connected to the base of the V1. When the detection voltage is normal, R6 upper voltage is higher than the detection tube emitter voltage, through R2?