PDF schematic for the LKN4 UMA board, numbered 10223-SA and 11223-1, packed in a 4.28 MB RAR. UMA means integrated graphics only, without a discrete GPU. The five-digit-dash format follows Wistron's numbering, which also covers boards used in Lenovo ThinkPads. Technicians use the circuit pages to follow power rails, check the sequencing of enable signals and identify components around a short. Open it in a PDF viewer and confirm the board number printed on the PCB matches before trusting values.
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 @schematicslaptop. Enginerys does not host this file.
All sources (6)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @schematicslaptop | 13 Mar 2022 | Open file on RM Schematics |
| @pepeelectronica | 26 Apr 2022 | Open file on RM Schematics |
| @cyberlanelectonik | 18 Jul 2026 | Open file on RM Schematics |
| @schematics_bios | 25 Jul 2026 | Open file on RM Schematics |
| @schematics_bios | 2 Aug 2026 | Open file on RM Schematics |
| @schematics_bios | 14 Aug 2026 | Open file on RM Schematics |
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.