PDF reference, 218 KB, for the LA7286, an IC from the LA series, a prefix associated with Sanyo linear integrated circuits. The name carries only the part number, so no function is stated and the content should be checked inside the document. Classified as a schematic, it likely includes pinout, block diagram and an application circuit. Repair technicians use such sheets to find supply pins, confirm expected voltages and follow signals through the chip. Match the complete marking, including any suffix, before using it for a replacement.
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.