HA17324 reference in PDF form, 64.4 KB, for the Hitachi quad operational amplifier in the 324 family. Though classed as a schematic, it is most likely the datasheet with pinout, absolute maximum ratings and typical characteristics. Use it to locate each op-amp section and its supply pins, check bias and output voltages while diagnosing analog stages, and confirm whether a common LM324 can stand in, which is usually the case for this pin-compatible quad amplifier.
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.