Master firmware dump for the Epson L220 ink tank printer, marked as an original 1M image and supplied as an 888 KB RAR archive. The 1M tag most likely refers to a 1 MB flash image taken from the formatter board. Technicians use such dumps to revive boards that no longer boot or show persistent errors, writing the image to the SPI flash with a programmer such as a CH341A. Keep a backup of the existing chip and check that its capacity agrees with the image before flashing.
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 @biosarchive. 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 →