Laptop schematic labelled SPEARS Intel UMA, built around Wistron board number 07211-3 with a 4W001 code and the date-like token 0326, marked revision R-3, as a 1.41 MB PDF. UMA means integrated graphics only, without a discrete GPU section. Wistron, an ODM supplying several brands, uses this five-digit dash pattern for boards. Technicians use it to follow power rails, the EC and charger circuits, and signal paths. Confirm the board number and the revision printed on the PCB match before relying on the values shown.
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 @alischematics. Enginerys does not host this file.
All sources (5)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @alischematics | 13 Sept 2021 | Open file on RM Schematics |
| @SCHEMATICWORLD | 17 Feb 2022 | Open file on RM Schematics |
| @ShareMan_Electronic_Files | 28 Apr 2025 | Open file on RM Schematics |
| @cynetitsolution | 15 May 2026 | Open file on RM Schematics |
| @schematics_bios | 5 Aug 2026 | Open file on RM Schematics |
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.