Ilpi354 Va Schematic Updated

| Pin | Name | What you should see (Updated notes) | Common Failure | | :--- | :--- | :--- | :--- | | 1 | EN0 | 3.3V (from VIN divider) | 0V = Bad resistors (R319/R320) | | 3 | VREG3 | 3.3V linear out | Short to GND (replace IC) | | 4 | VREG5 | 5V linear out | 2V-4V = Blown cap on 5V rail | | 6 | VO1_ON | 3.3V enable for 5V PWM | Check R326 pull-up | | 17 | VIN | 19V (via 2-ohm resistor) | Open resistor (look for burnt) | | 18 | EN1 | 3.3V (S5 enable) | 0V = S5 state stuck | | 23 | TRIP1 | OCL (Overcurrent latch) | 0V = Replace IC |

The updated schematic is available immediately. You can access the files below: ilpi354 va schematic updated

For engineers maintaining a library of service manuals, here is the precise changelog incorporated into the "ilpi354 va schematic updated" document (Rev 2.3): | Pin | Name | What you should

| Component | Old Schematic (Rev 1.0) | Updated Schematic (Rev 2.3) | Failure Symptom if Old Used | | :--- | :--- | :--- | :--- | | ZB101 (Zener) | 18V | 22V / 1W | IC503 latch-up on power-off | | R217 | 10kΩ | 33kΩ | 12V rail too high (14V+) | | C211 | 1000uF/25V | 1500uF/35V (Low ESR) | Ripple noise on audio output | | D118 | 1N4148 | UF4007 (Ultrafast) | Diode overheating, burning board | burning board |