【摘 要】
：
1.观察故障现象,配合电压测量确定故障部位由于以STR—S6709为核心的初级保护电路执行保护时,都是使振荡电路停振或控制驱动电路停止工作,保护时开关电源无电压输出;以HICl01
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1.观察故障现象,配合电压测量确定故障部位由于以STR—S6709为核心的初级保护电路执行保护时,都是使振荡电路停振或控制驱动电路停止工作,保护时开关电源无电压输出;以HICl015为核心的次级保护电路与待机控制电路联动,保护时与待机状态相似,开关电源输出电压降到正常值的1/2左右。检修时,可根据指示灯的变化和测量开关电源输出电压,判断故障范围。
1. Observe the phenomenon of failure, with the voltage measurement to determine the fault site As STR-S6709 as the core of the primary protection circuit to perform the protection, the oscillation circuit is to stop oscillation or control the drive circuit to stop working, the protection of the switching power supply voltage output; HICl015 as the core of the secondary protection circuit and standby control circuit linkage, protection and standby mode is similar to the switching power supply output voltage dropped to about 1/2 of the normal. Overhaul, according to the indicator light changes and measurement of switching power supply output voltage, determine the fault range.
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