电脑电源解析及故障解决案例（Computer power analysis and troubleshooting cases）.docVIP

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电脑电源解析及故障解决案例（Computer power analysis and troubleshooting cases）.doc

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电脑电源解析及故障解决案例（Computer power analysis and troubleshooting cases）

电脑电源解析及故障解决案例（Computer power analysis and troubleshooting cases） Computer power analysis and troubleshooting cases Computer power analysis and troubleshooting cases, computer power analysis and troubleshooting cases Computer power analysis and troubleshooting case ~ ~ please remember this site URL: source: love easy essence net: 6 love easy essence network, power supply (ATX) understanding chapter Lets have a casual look! OK is under understanding! The power is not so expensive right now! There is no need to risk life to repair it! Ha ha ~ ~ ~ ~) The whole circuit can be divided into two parts: the first part is the circuit from the power input to the switch transformer (including the auxiliary circuit of the auxiliary power supply) The circuit is directly connected with the AC 220V voltage and will be struck by an electric shock, called a high voltage side circuit. The other part will be the circuit after the switch transformer, and will not communicate with the 220V Directly connected, called the low voltage side circuit. The two circuit by high voltage ceramic capacitors, to eliminate electrostatic interference. The whole circuit is composed of AC input circuit, rectifier and filter Circuit, push-pull switch circuit, auxiliary switch power supply, PWM pulse width modulation circuit, PS-ON control circuit, protection circuit, output circuit and PW-OK signal formation Circuit composition. Heres a brief introduction to how each component works: 1 、 AC input circuit including input protection circuit and anti-interference circuit. The input protection circuit refers to the over-current, overvoltage protection and current limiting circuits in the AC input circuit Interference circuit has two aspects: first, the microcomputer power supply to the power grid through the interference signal suppression ability: two, refers to the switching power supply oscillation, high harmonic into Interference to other devices and monitors and interference to the microcomputer itself.