Spellman PCM5P120X2887 is a 120‑watt high‑voltage AC/DC power supply module that supplies a fixed polarity output (positive or negative as specified at order). It features a power‑factor‑corrected front end, universal input voltage capability (85 VAC to 265 VAC), and built‑in voltage and current regulation for stable operation in industrial or medical imaging equipment. Common failure points for this class of units include worn capacitors on the rectifier/filter stage, degraded MOSFETs or IGBTs in the switching section, and overheating of the internal heat sink due to inadequate airflow. First‑check diagnostics: verify input voltage and phase continuity with a multimeter; confirm output polarity and voltage against spec while monitoring for ripple; inspect the module for burn marks, swollen electrolytics, and ensure the cooling fan or heatsink is unobstructed.[oss-gpt-20b]