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故障现象:据用户讲,有时开机能启动,如不关机就一直正常。相隔一段时间开机就不启动,但电源指示灯亮。经多次推压电源开关,偶尔能启动。分析与检修:怀疑是开关电源问题,检查开关电源各组输出电压均正常。当时把底板翻转,开机一切正常了。凭经验,认为可能是某元件虚焊造成(该机是第一次检修)。笔者把 TDA8361的全部引脚及其相关元
Symptom: According to the user, sometimes boot to start, if not shut down on the normal. After a period of time does not start the boot, but the power indicator light. After pressing the power switch several times, occasionally can start. Analysis and maintenance: suspected switching power supply problems, check the switching power supply output voltage of each group are normal. At that time flip the floor, boot everything is normal. Experience, that may be caused by a component Weld (the aircraft is the first overhaul). I put all the TDA8361 pin and related elements