If the fuse blows instantly upon power-up, the bridge rectifier or the secondary Schottky diodes are often shorted.
Unlike many modern designs that use a dedicated standby power chip, some S-360-12 variants use a self-oscillating start-up mechanism. Primary Stage: s36012 power supply circuit diagram
: Most variants use the TL494 or a compatible PWM controller to manage the switching frequency and maintain a stable output voltage. If the fuse blows instantly upon power-up, the