Lenovo ThinkPad X1 Yoga 5th Gen firmware listed for machine type 20UC, compressed as an 11.1 MB RAR. The name carries no board number, revision or BIOS version. It differs in size from the 20UB package of the same generation, so the two should not be assumed interchangeable. Technicians program such images onto the SPI flash with an external programmer to fix corrupted firmware. Save and verify the original chip contents first and make sure the image matches the chip capacity.
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 @biosfilebins. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →