Welcome to the definitive chip-level repair resource for the Acer Travelmate X349-M, featuring the PEGATRON X3 REV 1.0 motherboard. This guide is specifically curated for professional repair technicians and electronics engineers engaged in advanced troubleshooting. Whether you are dealing with a 'No Power' state, liquid damage, or firmware corruption, the schematics and boardview files provided below are essential for tracing signals and identifying failed SMD components.
Motherboard Specifications
| Feature | Details |
|---|---|
| Laptop Brand & Model | Acer Travelmate X349-M Series |
| Motherboard Code | PEGATRON X3 REV 1.0 |
| Platform/CPU Architecture | Intel Skylake / Kaby Lake-U (Integrated PCH) |
| EC/KBC Controller | ITE IT8987E (Programmable) |
| Primary Power Rails | VIN (19V), +3VALW, +5VALW, +VCC_CORE, +1.0V_PCH |
Common Chip-Level Faults & Diagnostic Notes
- 19V DC-IN & Current Sense Resistor (PR301/VIN) Short-Circuit Diagnosis: If the motherboard is not drawing current, inspect the first and second input MOSFETs. Use a multimeter to check for a short to ground on the main B+ rail (PR301). Common failures include shorted MLCC capacitors (PC series) near the CPU or GPU power phases.
- 3.3V / 5V Standby Rail & PWM Buck Controller Troubleshooting: The standby IC (often a TPS or RT series) must output LDO voltages before the main 3.3V/5V rails are enabled. If the LDO is present but the inductors show 0V, verify the EN (Enable) signals from the EC. A warm EC chip usually indicates an internal short on the +3V_LDO line.
- Power-On Sequence & BIOS/EC Firmware Corruption: If the power button is pressed but the laptop fails to initialize, verify that RSMRST# is being released (3.3V) by the EC. If signals like PM_SLP_S3# are missing, the issue may lie in a corrupted BIOS or ME Region. Always backup original dumps before flashing a clean ME region firmware.
Free Schematic / Boardview Download
📥 Download ACER TRAVELMATE X349-M (PEGATRON X3 REV 1.0) Schematic / Boardview
Direct file link. Verified clean archive.
Need Additional Repair Assistance?
Explore our technician resources:
- 🛠️ Diagnose No-Power & Short-Circuit faults step-by-step: Interactive Laptop Diagnostic Lab
- 🛒 Original Replacement Motherboards & IC Components: Official Spare Parts Mega Store
