| Symptom | Likely Failure | Fix | |---------|----------------|-----| | No output, input present | Blown fuse (F1) or dead IC | Check continuity across F1. Replace IC if VIN pin is live but no SW activity. | | Output voltage low or pulsing | Short circuit on output or faulty feedback divider | Disconnect load. Measure R1,R2. Check output capacitor ESR. | | Board gets extremely hot | Shorted Schottky diode (D1) or inductor saturation | Diode test: should show ~0.2V drop one way only. Replace inductor if core cracked. | | Output voltage equals input | IC’s switch transistor shorted | Replace IC immediately; output side components may be overvoltaged. | | No output, but IC warm | Enable pin floating or wrong voltage | Some ICs have an EN pin; tie to VIN or GND as per datasheet. |
In the neon-drenched sprawl of Neo-Saitama, the wasn’t just a power supply module—it was the heart of a ghost. wx-dc12003 schematic
If you're designing an enclosure for this, you can find ready-to-print 3D models on Thingiverse. | Symptom | Likely Failure | Fix |