论文部分内容阅读
1.用试验电源给机器供电的时候,按开机按钮后有开机电流(100mA左右),但是放开按钮后电流就下降为零,实际是接近于零为几十微安故障分析与检修:该故障一般是开/关机电路的三极管电流放大倍数太小或者三极管损坏所致,当按“开机”键时,PLAYON应该为接近电池电压、PWRON应该为高电平(3.3V),如果该两点电压异常,通常是三极管损坏,或者就是BAV70损坏,或是3.3V稳压ICXC6365A以及1.8V的ATl366DC-DC损坏。排电路的
1. With the test power supply to the machine, press the boot button after the boot current (100mA or so), but the release of the button after the current dropped to zero, the actual is close to zero for tens of microamperes Failure Analysis and Maintenance: The Fault is generally on / off transistor circuit current amplification is too small or damaged transistor, when you press the “power on” button, PLAYON should be close to the battery voltage, PWRON should be high (3.3V), if the Two voltage anomalies, usually damaged transistor, or BAV70 damage, or 3.3V regulator ICXC6365A 1.8V ATl366DC-DC damage. Row of circuits