Schematic for an X421EA mainboard at revision 2.1, provided as a 10 MB PDF. The name states no brand, but X421EA matches ASUS VivoBook model naming; verify against the board markings. A schematic like this lets a technician follow power-on sequencing, check which rails should appear in standby, trace charger and VRM circuits and look up part values. Confirm the revision on the PCB reads 2.1, since a 2.0 board may differ in component placement or circuit details.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @notebookschematic. Enginerys does not host this file.
All sources (3)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @notebookschematic | 5 Feb 2025 | Open file on RM Schematics |
| @ShareMan_Electronic_Files | 5 May 2025 | Open file on RM Schematics |
| @schematiclaptopramkushwaha | 13 Sept 2025 | Open file on RM Schematics |
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.