The Tectrol 070‑139205C1 is a modular industrial DC power supply used to regulate voltage and current for control panels, servo drives, and other factory automation equipment. Common failures in this model include capacitor degradation on the input filter (causing ripple or overheating), transformer winding insulation breakdown, and failure of the main switching MOSFETs due to over‑voltage spikes; these often present as a loss of output voltage, excessive heat, or audible noise. First‑check diagnostics: verify that the unit receives its rated AC input and that the output rails match spec with a multimeter; inspect the board for bulging electrolytics, burn marks, or loose connections; and review any diagnostic LEDs or error codes supplied by the host controller before proceeding to component testing.[oss-gpt-20b]