Ilpi-354 V.a Schematic <2026 Update>

| Reference Designator | Component | Role in Schematic | |----------------------|-----------|--------------------| | | 3.15A Slow-Blow Fuse | Overcurrent protection | | RV1 | 14D471K Varistor | Surge suppression (MOV) | | IC1 | ILP-354 PWM | Switching control & voltage regulation | | Q1 | IRF840 | Primary switching transistor | | T1 | Ferrite Transformer | Isolation & voltage step-down | | D9 | PC817 | Galvanically isolated feedback | | U2 | TL431 | Precision shunt regulator (sets output voltage) |

— Chris, vintage test gear tinkerer

Troubleshooting the ILPI-354 V.a Power Board: A Repair Guide Ilpi-354 V.a Schematic