The Melco 10512‑01 is a 15‑year‑old industrial DC power supply used in motor drive and control cabinets. Common failure modes for this class of units include failed bridge rectifier diodes, overheated or burnt MOSFETs, degraded output capacitors, and loose or corroded terminal connections that can cause intermittent voltage drops or over‑voltage spikes. Begin diagnostics by verifying the input AC voltage and polarity to the supply’s inlet; then measure the DC output under no load and with a representative load to check for correct voltage regulation and ripple. Inspect all fuses, connectors, and heat sinks for signs of damage or overheating, and review any logged error codes on the associated controller for clues to power‑supply related faults.[oss-gpt-20b]