The Tectrol TC36S‑1489 is a 100–240 VAC, 12 A, 50/60 Hz industrial power supply rated at 750 W, used to convert mains input to the regulated DC outputs required by heavy‑duty controllers or drives. Common failure modes for this model include degraded electrolytic capacitors on the rectifier/filter stage, resulting in output voltage sag and overheating of the internal switching regulator; a burnt or failed MOSFET can also cause complete loss of output or intermittent operation. Initial diagnostics should verify that the input mains is within spec (100–240 V, 12 A), measure the regulated DC outputs for correct voltage and ripple, inspect the PCB for bulging or cracked capacitors and check the temperature of the switching regulator under load; if these checks fail, proceed to component‑level testing of the rectifier bridge and MOSFETs.[oss-gpt-20b]