Samsung PSPF651B01A power supply board

Samsung PSPF651B01A is a 15‑V, 5 W AC‑to‑DC power supply board commonly used in Samsung and Dell TV models (e.g., W5001CHD, W4201CHD). Known failure modes include melted or cracked capacitors on the input side, burnt output diodes, and broken PCB traces due to vibration or thermal cycling. First‑check diagnostics: verify 120 VAC input voltage and ripple with a multimeter; measure the regulated 15 V DC output and inspect for dropout or spikes; visually inspect the board for burn marks, cracked components, or loose solder joints. If those tests are normal, proceed to check the fuse and any associated protection circuitry before re‑soldering or component replacement.[oss-gpt-20b]

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