The power MOSFETs can fail, creating a short to ground. B. PS4 Turns On and Instantly Shuts Down
The ADP-200ER is a switching power supply that operates with high voltage—up to ~400V DC on the main capacitor. Always ensure the unit is unplugged and the main capacitor is discharged before touching any components. Conclusion Adp-200er Schematic
Measure continuity across the main input fuse (F1) using a multimeter. If open-loop (OL), a short circuit occurred on the primary side. The power MOSFETs can fail, creating a short to ground
The schematic will label the windings: