Uses widely available MOSFETs and capacitors, easing component-level repair. ⚠️ Limitations
| Pin Number | Label (Typical) | Function | Voltage | | :--- | :--- | :--- | :--- | | 1 | AC/L | Live Input (Hot) | 110-230V AC | | 2 | AC/N | Neutral Input | 110-230V AC | | 3 | FG | Frame Ground / Earth | 0V (Chassis) | | 4 | +V | Main Output Positive | 12V, 24V, or 5V (Check label) | | 5 | COM | Common Ground (Secondary) | 0V | | 6 | +V_SB | Standby Voltage (if present) | 5V / 0.5A | | 7 | PS-ON | Power On signal (Active Low) | 5V / 0V Enable | ipkbl-sr 35w schematic
I believe this is a power / regulator board used in certain laptops (possibly ThinkPad models with USB‑C / slim tip charging). The silkscreen reads something like: Uses widely available MOSFETs and capacitors