power supply 880-292 board

The 880‑292 is the phase‑control circuit board for Century Solar welders (model series 83170/83171). Common failures include burnt or tripped MOSFETs, degraded electrolytic capacitors on the power rail, and cracked traces from vibration; a shorted output can also trip the internal fuse. Check the input voltage and continuity of the main power rails first, then inspect for visible burn marks or swollen caps, and verify that the phase‑control IC outputs match the expected PWM waveform before proceeding to component replacement.[oss-gpt-20b]

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