【摘 要】
：
2.主/副开关电源电路(1)二次开机后检查ICl(L6599D)的7脚,若低于1.5 V就会停振(7脚正常电压为1.66 V,待机时为1.2 V),一般ICl的7脚低于1.5 V停振,是由于PFC电路工作不正常或
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2.主/副开关电源电路(1)二次开机后检查ICl(L6599D)的7脚,若低于1.5 V就会停振(7脚正常电压为1.66 V,待机时为1.2 V),一般ICl的7脚低于1.5 V停振,是由于PFC电路工作不正常或输出的PFC电压低于380 V引起的。要判定ICl工作不正常是否与PFC电路有关,可将PFC驱动电路U1的供电8脚和7脚外接电阻R6均断开,取消PFC电路,再把ICl的7脚分压电阻R17阻值由原来的10 kΩ改大为12 kΩ,若输出电压能正常,则检查R13、R14及PFC电路相关元器件即可。
2. Main / Sub switch power supply circuit (1) Check the ICl (L6599D) pin 7 after the second power-on and stop it if it is less than 1.5V (normal voltage of 7 feet is 1.66 V and standby time is 1.2 V) ICl 7 feet below 1.5 V stop vibration is due to PFC circuit is not working properly or the PFC output voltage is lower than 380 V caused. ICl to determine whether the work is not normal and PFC circuit, PFC drive circuit U1 can supply 8 feet and 7 feet external resistor R6 are off, cancel the PFC circuit, then the ICl’s 7-pin resistor R17 resistance value from the original 10 kΩ is changed to 12 kΩ, if the output voltage can be normal, then check R13, R14 and PFC circuit related components can be.
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