The Sorenson DCS150‑20 is a 3 kW programmable DC power supply that delivers up to 150 V and 20 A through high‑frequency switching regulation for development, system integration, and burn‑in applications. Common failure points in this class include input voltage sag or ripple causing the internal controller to trip, overheating of the main MOSFETs or transformer winding leading to thermal shutdown, and degradation of the output filter capacitors that can produce noise or voltage droop. First‑check diagnostics: verify the mains supply meets the rated 115/230 V ±10 % and inspect the input fuse; measure the output voltage and current under load to confirm regulation within tolerance; visually inspect for burnt components, loose connections, or signs of thermal damage on the PCB and heat sink.[oss-gpt-20b]