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例1 机型:NV—M3000EN 故障现象:不能开机,电源指示灯不亮;按出盒键也不执行。分析与检修:一般摄像机在电源未打开时、若按下出盒键也能执行,同时电源指示灯在出盒期间是亮的,待出盒完毕后再熄灭。根据上述情况分析,故障发生在电源本身以及键输入至系统控制CPU之间。倘若机器在按下电源开关时能闪亮,证明故障范围更广。除具有以上故障外还会涉及到逐多方面,比如:上载系统坏导致CPU在开机后不能自检,或是电路局部短路引起的电压异常;空气湿度大带来的结露……,种种异常现象
Example 1 Model: NV-M3000EN Fault phenomenon: can not boot, the power light does not light; press the box button is not executed. Analysis and Maintenance: General camera power is not turned on, press the box button to perform, while the power indicator light is out of the box until the box is completed and then off. According to the above analysis, the fault occurred in the power itself and the key input to the system control CPU. If the machine can shine when the power switch is pressed, it proves that the fault range is wider. In addition to the above failure will also involve more than one by one, for example: the upload system is bad lead to the CPU after the boot can not be self-test, or the circuit caused by a partial short circuit voltage anomaly; dew condensation caused by air humidity ... ..., phenomenon