This device consists of a common oscilloscope and an auxiliary circuit.It was mainly designed for finding out failed parts on PCB(printed circuit board)when PCB is off from host machine and powered─off.The current/voltage curves of PCB were measured with this device and displayed on the screen,then the features of the curves were analyzed and compared.Characteristics were distinguished,which led to fining out the failed parts.It is a trouble shooting device for engineers to maintain electronic PCB’s.
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