Printer firmware for the L360, likely an Epson ink-tank model, labelled master and marked OK, in an 888 KB RAR archive. No version or chip details are given in the name. Technicians use such dumps to reprogram the main board flash memory with a programmer when a printer is bricked or its firmware is corrupt. Read and save the original chip first, check the image fits the target chip size, and confirm the board is from the same model.
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 →