Troubleshooting ideas for switching power supply-- Moso power supply professional agent imported switching power supply

by:MOSO     2020-02-19
Switching power supply failure (No voltage output) : The switching power supply has no output. If the fuse is blown and black is serious, check whether there is a short circuit fault. Usually, 300V filter capacitor, degaussing resistor and switching power supply tube damage are more common. If there is no obvious short circuit, detect whether 300 v dc is normal, repair 300V rectifier filter circuit if abnormal, and repair switching power supply if normal. If the switching power supply has no voltage output, it should focus on checking the starting circuit, positive feedback branch and power switch tube. If necessary, the control branch can be disconnected to determine whether the oscillation circuit is normal, but at this time, step-down maintenance is carried out. In addition to the basic circuits mentioned above, some new TV power supplies mostly adopt many protection circuits. When the power supply is over-voltage, over-current, abnormal load or the protection circuits and protective components are not good, it will also cause no output failure of the power supply, which should be paid attention. In addition, you can refer to 'three none (Caused by the power supply part)'To overhaul. The output voltage is low and there is abnormal noise: the output voltage is low and there is abnormal noise, which is usually a failure of the power supply itself or a failure of the power supply load. False load can be used to judge whether the power supply is normal, if it is confirmed that the output voltage of the power supply is too low, besides the voltage stabilizing control loop, the positive feedback loop, the load loop and the switching transformer should also be checked. If the power supply is normal with false load, it is mostly a power load failure, which can be referred to as 'three no (Caused by row part)'And' three none (Caused by the power supply part)'To overhaul. If the row part is normal, it can be detected whether other power supply loads are normal. Unstable output voltage: usually the instability of the output voltage of the power supply may be caused by the power supply itself or by the load of the power supply. The method with false load can be used to judge whether the power supply is faulty. If it is confirmed to be a power failure, the voltage stabilizing control part should be mainly overhauled. If the load is not good, please refer to 'three none (Caused by row part)'To overhaul. In addition, you can refer to 'three none (Caused by the power supply part)'To overhaul. If the row part is normal, it can be detected whether other power supply loads are normal. High output voltage: for the output voltage of the power supply is too high, the fault should be in the voltage stabilizing control loop, and very few are in the power switch tube and switching transformer. Moso power supply has been committed to the agent sales of imported power supplies since 1993 and has won the trust of many outstanding power supply enterprises. The agent has EMERSON switching power supply ( ASTEC switching power supply, ARTESYN switching power supply), MURATA-PS switching power supply (C &D) , COSEL switching power supply, ARCH switching power supply, VICOR switching power supply, CHEROKEE switching power supply, ROAL switching power supply and other superior imported switching power supply brands. Moso power supply is fully supported by various suppliers, adhering to the company's consistent purpose, providing users with * Good, * New power products, and is committed to providing users with a full range of power system solutions. Please call 0755-83562355 consultation, thank you!
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