Power Supply Boards

Power-supply boards (switching and linear) are responsible for providing stable and clean voltages to all sections of an electronic system, and their failure is one of the most common causes of equipment downtime. Switching supplies typically include PFC circuits, high-frequency transformers, power switches (MOSFET or IGBT), secondary rectifiers and feedback control circuits. Specialized diagnostics cover measurement of output ripple and noise, testing of electrolytic capacitors for ESR and capacitance, inspection of transformers and optocouplers, and analysis of behavior under variable load. Professional repairs include replacement of faulty capacitors with high-quality, long-life parts, replacement of power switches and driver circuits, elimination of control-loop oscillation problems, and complete thermal and electrical stability testing. These services ensure that the power supply delivers accurate voltages, low ripple and long-term reliability after repair.