Recently, the chassis was found to have signs of leakage. The electric pen was used to test on the computer case. It was found that the front panel and the side panel of the chassis were normal. That is, the electric pen light was on when the rear panel was touched, and the seam was the brightest.
The problem of charging the chassis is more common, but in most cases the voltage is lower than 36V, and the user is not easy to detect. The charging of the chassis does not fully explain the leakage of the power supply or the motherboard. Because the power supply circuit itself is connected to the capacitor between the input and the ground to achieve the filtering effect. The ground wire is connected to the power supply or the chassis of the chassis. of. If the power supply is not properly grounded, it is possible to measure the chassis voltage to ground. Therefore, if you find that your chassis is live, the first thing to do is to connect the ground wire to the power supply (the top of the three power outlets is the ground wire). Many households' grids do not bury the ground wire according to the specifications. This is a safety hazard. Electricians need to be asked to improve the power grid. You can also connect the ground port to the metal water pipe to achieve the grounding effect.
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