Code 45CIQ100 is the only detail in this 333 KB PDF, listed as a schematic without any brand, model or board revision. It looks like a semiconductor part number closely related to 45CKQ100, possibly differing in package or terminal configuration, so expect a datasheet. Open it with any PDF viewer to check the pinout, mechanical drawing and electrical ratings. Since related codes differ in configuration, confirm the exact marking on your part before using it as a replacement reference.
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 @cyberlanelectonik. 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.