The Power Systems Inc. PS 1610‑1 is a modular industrial DC power supply unit commonly used in motor drives, PLCs, and control panels. Known failure modes for this class of supplies include output voltage sag due to degraded rectifier diodes or filter capacitors, overheating from overcurrent or poor ventilation, and failure of the internal protection IC causing intermittent shutdowns. First‑check diagnostics: verify input AC voltage and polarity, measure output DC rails for correct voltage and ripple; inspect for visible signs of component damage (burn marks, bulging caps); confirm that the thermal fuse or watchdog reset circuitry is functioning and that any built‑in diagnostic LEDs or fault codes are clear.[oss-gpt-20b]