Case:
Samsung HM321ix does not power, and the customer describes the normal use suddenly becomes the situation.
Solution:
This is an original Samsung mobile hard disk. Opening the box and found that it is the circuit board of the Samsung new USB interface. It has no important IC damage. It is less likely to judge the short circuit of IC.Use a multimeter meter measuring circuit board to power up, and find that there is no output voltage in the rear level. The basic problem is locked at the DC entrance. After detection, it is found that there is a simple protection circuit in the circuit board.Add an empty board measurement to judge the MOS tube, replace the same type of MOS tube re -measurement and find that the insurance inductance performance is poor. After replacement of insurance, the fault is excluded. The circuit board can be powered normally.