Jymc220bi Schematic 2021

IC_SW --- INDUCTOR ---(+) OUTPUT (+5V) | DIODE (cathode to SW, anode to GND_primary) | GND_primary (tied to AC neutral)

Would you like a for common failure modes (no output, blinking LED, overheating) instead? jymc220bi schematic 2021

It seems you are looking for the (circuit diagram) for a JYMC220BI board, likely from around 2021 . IC_SW --- INDUCTOR ---(+) OUTPUT (+5V) | DIODE