Q1: How to deal with the blown fuse of switching power supply (smps)?
If the fuse of a switching power supply blows, it usually signals an internal circuit fault, often caused by grid voltage spikes or surges that lead to excessive current. First, inspect the input-side components such as rectifier diodes, high-voltage filter capacitors, and inverter switching tubes for breakdown, open circuits, or damage. Check the circuit board for burnt parts or electrolyte leakage; if none are visible, use a multimeter to test for short circuits or breakdowns. Even after replacing the damaged component, do not power on the unit immediately—make sure all high-voltage components on the board are fully checked and verified normal first to avoid damaging the new parts.
Q2: How to extend the service life of a switching power supply?
To extend the life of a switching power supply, install it in a well‑ventilated area away from dust, moisture, and high temperatures. Avoid overloading or running it at full power continuously. Use a stable power input and install it properly to reduce vibration. Keep the unit clean and ensure good heat dissipation. Operate within its rated voltage and load range, and avoid frequent switching on and off.
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