Общие неисправности из регулируемые питание питание
Перегорел предохранитель
Generally, a blown fuse indicates a problem with the internal wiring of the power supply. Because the power supply works in the state of high voltage and high current, the fluctuation and surge of the grid voltage will cause the current in the power supply to increase instantaneously and cause the fuse to blow. The focus should be to check the rectifier diodes at the power input end, high-voltage filter electrolytic capacitors, inverter power switch tubes, etc., and check whether these components have breakdown, open circuit, damage, etc. If the fuse is indeed blown, you should first check the components on the circuit board to see if the appearance of these components is burnt or if the electrolyte overflows. If the above situation is not found, use a multimeter to measure whether the switch tube has a breakdown or short circuit . Special attention should be paid to: When a certain component is found to be damaged, it must not be turned on directly after replacement. This is likely to cause damage to the replaced component due to other high-voltage components still having faults. All high-voltage components in the above circuit must be safely checked After checking and measuring, the fault of blown fuse can be completely ruled out.
No DC напряжение выход или нестабильный напряжение выход
If the fuse is intact, there is no output of DC voltage at all levels under load. This situation is mainly caused by the following reasons: open circuit and short circuit in the power supply, failure of the overvoltage and overcurrent protection circuit, failure of the auxiliary power supply, failure of the oscillating circuit, overload of the power supply, and rectification diodes in the high frequency rectification filter circuit. Breakdown, filter capacitor leakage, etc. After measuring the secondary components with a multimeter and excluding the breakdown of the high-frequency rectifier diode and the short circuit of the load, if the output is zero at this time, it is certain that the control circuit of the power supply is faulty. If there is a partial voltage output, it means that the pre-stage circuit is working normally, and the fault is in the high-frequency rectification and filtering circuit. The high-frequency filter circuit is mainly composed of a rectifier diode and a low-voltage filter capacitor to output DC voltage. The breakdown of the rectifier diode will cause the circuit to have no voltage output, and the leakage of the filter capacitor will cause failures such as unstable output voltage. The damaged components can be checked by statically measuring the corresponding components with a multimeter.
Плохо питание нагрузка емкость
Poor load load capacity of the power supply is a common fault, which usually occurs in old-fashioned or long-working power sources. The main reason is that the components are aging, the switching tube is unstable, and the heat dissipation is not perform in time. It should focus on checking hapether the Set Heat Heat leakage, the rectifier diode is damage, and the high-voltage filter capacitor is is поврежден.
