The Sony Magnescale PU10A‑2 is a compact 40 VA industrial power supply that accepts 100–120 VAC at 50/60 Hz and delivers three DC outputs with a primary 5.7 VDC rail rated for up to 2 A. Typical failure modes on this class of unit include degraded output voltage due to failed filtering capacitors, overheating of the internal switching regulator, or burnt-out rectifier diodes that can cause loss of one or more DC rails. First‑check diagnostics: verify input voltage and ripple with an oscilloscope; measure each DC output against spec while monitoring for dropout or excessive heat; inspect the board for cracked solder joints, bulging capacitors, or signs of thermal damage before proceeding to component replacement.[oss-gpt-20b]