Two NPN power bipolar junction transistors (BJTs), frequently 13009 series , are arranged in a half-bridge layout.

: Two high-voltage NPN bipolar junction transistors (typically 13009 series or similar power MOSFETs) are mounted directly to an aluminum heatsink.

Large MOSFETs or BJTs (like the 13009 series) that chop the DC voltage into high-frequency pulses.

: 85~264V AC (selectable via switch, usually 110V/220V). Efficiency : Typically between 78% and 86%. Cooling : Built-in temperature-controlled DC fan.

: Unlike modern circuits that feature an independent auxiliary chip to kickstart power to the controller, the S-360-12 reverse-engineered designs show an older self-oscillating configuration. A network of resistors and diodes forces a tiny, un-timed oscillation between the primary transistors right at startup. This initial pulse generates enough auxiliary voltage on the transformer secondary to wake up the central controller chip. 4. The Controller and PWM Driver Stage

: The main primary switching transistors (13009) or the main input bridge rectifier have suffered a short circuit. Replace both transistors, inspect their accompanying base resistors, and test the rectifier block.

: The TL494 controls the duty cycle of the pulses driving the main transistors, operating typically between 25 kHz and 50 kHz.

The is a widely used industrial switch-mode power supply (SMPS) designed to convert alternating current (AC) into a stable direct current (DC) output. Typically rated for a 12V DC output with a 30A capacity (360 Watts), this power supply is a staple in 3D printing, LED lighting strips, CCTV security systems, and radio communication setups.

is a widely used 360W switching power supply (SMPS) designed to convert AC input into a stable 12V DC, 30A

: It initiates oscillation through minor biases in one of its two primary BJTs, which induces voltage in the driver transformer to jumpstart the main controller. Controller : Once running, the circuit is typically managed by a TL494 PWM controller

Suppresses electromagnetic interference and protects the circuit from voltage surges.