LED board schematic from the Lepus (ZHX) project, RAMP stage, a 342 KB PDF that covers only the small indicator sub-board. It pairs with the mainboard and USB board drawings of the same series. Expect status LED drivers, current-limiting resistors and the connector that links back to the main board. Technicians use it when indicators fail to light, to confirm the connector pinout or to check whether the fault lies on the sub-board or the mainboard. The name names no brand, so confirm that the board code matches.
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 @afsschematicfree. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.