The Modicon AS‑P810‑000 is a 2 A AC power supply module used in Schneider Electric’s Modicon 984 PLC series to provide regulated DC output for the controller and peripheral I/O. Common failure points for this class of industrial power modules include overheating due to overcurrent, failure of the internal rectifier bridge or smoothing capacitors, and degradation of the voltage regulator IC under prolonged high ambient temperatures. First‑check diagnostics: verify input AC voltage and frequency with a multimeter; inspect the module for burn marks, swollen electrolytics, or loose connections; measure the output DC rails to confirm proper regulation before proceeding to replace components or re‑soldering as needed.[oss-gpt-20b]