power supply 302 power supply

The PWS‑302‑1S is a 300 W ATX cold‑swap server power supply used in SuperMicro 1U chassis and similar rack‑mount systems. Typical failure modes include degraded electrolytic capacitors causing ripple or dropout, fan motor stalling or bearing wear leading to overheating, and output voltage drift due to aging MOSFETs or regulator ICs. First‑check the input mains for proper voltage and polarity, then verify the 12 V/5 V/3.3 V rails with a multimeter while monitoring current draw; inspect the internal fan and heat sink for dust or mechanical failure, and review any diagnostic LEDs or error codes on the motherboard that may indicate PSU status.[oss-gpt-20b]

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