# Vacuum A0 PCBA static validation

- Candidate PCB DRC (KiCad CLI 10.0.6): 0 violations, 0 unconnected items. The JSON report lists default excluded checks; inspect them before manufacturing.
- Schematic ERC on the matching project copy: 48 warnings, 0 errors. Every warning is the missing `Project` symbol-library alias in this local KiCad configuration. The custom `Vacuum_Shunt` footprint table resolves in the paired project.
- KiCad integrated schematic-parity run on a paired scratch copy: 217 parity warnings, 0 physical DRC violations, 0 unconnected board items. The warnings are preserved in `paired_drc_parity.json`; net names differ by root-sheet `/` prefix and KiCad also reports footprint/library-name comparisons.
- Independent KiCad netlist-to-IPC-D-356 comparison: 164 component reference/pin pairs; 152 connected pairs agree after root-slash normalization and 12 are explicitly unconnected/N.C. on both sides; no missing reference/pin pairs or other net mismatches. Sixty-six via records are excluded from the component-pad comparison. See `pad_net_comparison.json` and rerun with `compare_pad_nets.py`.

This candidate is not fabrication released. Resolve project/library parity warnings and review BOM/footprints/clearances, then perform DFM and physical tests with the actual blower, USB-C PD adapter, UI harness, and reference product. Firmware hard-locks fan output off. No sample, energized board, air-flow, dust capture, acoustic, thermal, EMC, electrical-safety, lifetime, or manufacturing test has been performed.
